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? 2010 x-powers limited - all rights reserved x-powers datasheet single cell li-battery pwm c harger and power system management ic AXP202
vq.qw wppiqpwe cc confidential page 2/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 1 introduction AXP202 is designed to be a highly-in tegrated power system managemen t ic that is optimized for applications requiring single-cell li-battery (li-ion/po lymer) and multiple output dc-dc converters. it is offering an easy-to-use and flexible complete soluti on which can fully meet t he increasingly complexity of accurate power control required by modern application pr ocessor system. AXP202 comprises an adaptive usb-compatible pwm charger, 2 buck dc- dc converters, 5 ldos, multiple 12-bit adcs of voltage, current and tem perature as well as 4 c onfigurable gpios. to guarantee the safty and stability of power system, ax p202 has integrated variou s protection circuits such as over voltage protection(ovp)/under voltage protection(uvp) over temperature protection(otp) over current protection(ocp). with intelligent power select, ips? circuits, ax p202 can distribute power safely and transparently among external ac-adapter, li-battery and loaded application system, and it can still work normally when there is no battery (deeply discharged/infectiv e battery) but only external input power source. the AXP202 provides a small, simple solution for obt aining power from three different power sources, single-cell li-ion battery, usb port, and ac-adapter, and it can support rechargable backup battery too. to ensure compatibility with a wide range of syst em processors, AXP202 uses a stwo wire serial interface (twsi),through which appl ication processor is capable of enabling/disabling power rails, programming voltage, visiting internal registers as well as measurement data (including fuel gauge). with the power monitoring results of high precis ion (1%, determined by the 1% bias resistance), end users will be always posted with the real-time power consumpti on, which can bring them an unprecedented experiences of power management. AXP202 is available in a 6mm x 6mm 48-pin qfn package. product application z portable handset: smartphone, pmp/mp4, digital camera, digital camcorder, pnd, pda, ptv z mobile connected devices such as xpad,mid z dpf, portable dvd player ultra mobile umpc and umpc-like entertainment and education machine z application processor systems z other battery and multi-power systems pin description
vq.qw wppiqpwe cc confidential page 3/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 2 feature ? intelligent power select(ips) o wide input voltage 2.9v~6.3v (amr -0.3v~11v) o configurable highefficient ips system o adaptive usb(supporting usb3.0) or ac-adaptor with voltage/current-limit (4.4v/900ma/500ma/100ma) o equivelent resistance of batter power path less than 75m ? fully integrated pwm charger o max charge current up to 1.8a o support battery temperature monitoring o support usb compatible charger( supporting usb3.0) o support battery of various voltage such as 4.1v/4.15v/4.2v/4.36v o automatic charge procedure management o directly drive led to indicate charge status o automatical scaling of charge current according to the system load ? backup battery o backup battery to supply power for rtc o support backup battery charge with adjustable charge current ? 2 synchronous duck dc-dc o dc-dc1 : pwm charger o dc-dc2 : 1.6a ,with voltage from 0.7v to 2.275v and 25mv/step, supporting voltage ramp control(vrc) o dc-dc3 : 1.2a with voltage from 0.7v to 3.5v and 25mv/step ? 5 low-dropout linear regulator(ldo) o ldo1:always-on 30ma ldo1 o ldo2:200ma low noise with voltage from 1.8v to 3.3v and 100mv/step o ldo3:200ma with voltage from 0.7v to 3.5v and 25mv/step o ldo4:200ma low noise with voltage from 1.8v to 3.3v and 100mv/step o ldo5:50ma low noise with voltage from 1.8v to 3.3v and 100mv/step ? signal capture system o 12 channel on-chip 12-bit adc o support 2 external signal input o provide battery and external input power current and voltage o on-chip coulometer and fuelgauge with high precision o provide various power management data such as transient power consumption(ma or mw), remaining battery life(% or mah) charge state(%) and charge time o two-level low-power warning & protection o provide AXP202 die temperature ? host interface o host can exchange data with pmic via twsi o flexible interrupts and sleep management o flexible pin function configuration. multiple gpio can be set as io, adc and so on o on-chip configurable timer o 12 registers for data storage during system power-off ? system management o support soft reset and hard reset o support soft power-off and hard power-off o support exteranl wakeup triggers o support output voltage monitoring and self-diagnosis o output pwrok indicating system reset or power-off o external power detection(plugin/removal/inqualified drive capability) o support soft power-on for input & output o overvoltage/undervoltage protection(ovp/uvp) o overcurrent protection(ocp) o overtemperature protection(otp) o support otg vbus power state setting/monitoring ? highly integration o internal reference voltage with high accuracy (0.5%) o on-chip mosfet o customizable timing and output voltage
vq.qw wppiqpwe cc confidential page 4/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 3 typical application
vq.qw wppiqpwe cc confidential page 5/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 4 absolute maximum ratings symbol description value units acin input voltage -0.3 to 11 v vbus input voltage -0.3 to 11 v t j operating temperature range -40 to 130 ts storage temperature range -40 to 150 t lead maximum soldering temperature (at leads 10sec) 300 v esd maximum esd stress voltage human body model >4000 v p d maximum power dissipation 2100 mw 5 electrical characteristics v in =5v bat=3.8v t a = 25 symbol description conditions min typ max units acin v in acin input voltage 3.8 6.3 v i out v out current available before loading bat 500mv voltage drop 2500 ma v uvlo acin under voltage lockout 3.8 v v out ips output voltage 2.9 5.0 v r acin internal ideal diode on resistance pin to pin, acin to ipsout 170 m ? vbus v in vbus input voltage 3.8 6.3 v i out v out current available before loading bat 500 900 ma v uvlo vbus under voltage lockout 3.8 v v out ips output voltage 2.9 5.0 v r vbus internal ideal diode on resistance pin to pin, vbus to ipsout 300 m ? battery charger v trgt bat charge target voltage -0.5% 4.2 +0.5% v i chrg charge current 1200 1800 ma i trkl trickle charge current 10% i chrg ma v trkl trickle charge threshold voltage 3.0 v
vq.qw wppiqpwe cc confidential page 6/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 v rechg recharge battery threshold voltage threshold voltage relative to v target -100 mv t timer1 charger safety timer termination time trickle mode 40 min t timer2 charger safety timer termination time cc mode 480 min i end end of charge indication current ratio cv mode 10% 15% i chrg ma backup battery v trgt backup battery charge target voltage 2.5 3.0 3.1 v i chrg backup battery charge current 50 200 400 ua i backup current when use backup battery 10 15 ua ntc charge 2.112 v tl cold temperature fault threshold voltage discharge 0 3.226 3.264 v charge 0.397 v th hot temperature fault threshold voltage discharge 0 0.282 3.264 v v te ntc disable threshold voltage falling threshold hysteresis 0.2 v ideal diode r ds(on) on resistance(bat to ipsout) 75 m ? symbol description conditions min typ max units off mode current i batoff off mode current bat=3.8v 27 a i suspend usb vbus suspend mode current bat=3.8v vbus=5v n_vbusen=1 86 a logic v il logic low input voltage 0.3 v v ih logic high input voltage 2 v twsi v cc input supply voltage 3.3 v addres s twsi address 0x68 f sck clock operating frequency 400 1200 khz t f clock data fall time 2.2kohm pull high 60 ns
vq.qw wppiqpwe cc confidential page 7/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 t r clock data rise time 2.2kohm pull high 100 ns dcdc f osc oscillator frequency default 1.5 mhz dcdc2 i lim2 pmos switch current limit pwm mode 2300 ma i dc2out available output current pwm mode 1800 ma v dc2out output voltage range 0.7 2.275 v dcdc3 i lim3 pmos switch current limit pwm mode 1400 ma i dc3out available output current pwm mode 1000 ma v dc3out output voltage range 0.7 3.5 v symbol description conditions min typ max units ldo1 v ldo1 output voltage i ldo1 =1ma -1% 1.3 3.3 1% v i ldo1 output current 30 ma ldo2 v ldo2 output voltage i ldo2 =1ma 1.8 3.3 v i ldo2 output current 200 ma psrr power supply rejection ratio i ldo2 =60ma 1khz tbd db e n output noise,20-80khz vo=3v , io=150ma 28 v rms ldo3 v ldo3 output voltage i ldo3 =1ma 0.7 3.5 v i ldo3 output current 200 ma psrr power supply rejection ratio i ldo3 =10ma 1khz tbd db e n output noise,20-80khz vo=1.8v , io=150ma tbd v rms ldo4 v ldo3 output voltage i ldo3 =1ma 1.8 3.3 v i ldo3 output current 200 ma psrr power supply rejection ratio i ldo3 =10ma 1khz tbd db e n output noise,20-80khz vo=1.8v , io=150ma 18 v rms ldo5 v ldo5 output voltage i ldo5 =1ma 1.5 3.3 v i ldo5 output current 50 ma psrr power supply rejection ratio i ldo5 =10ma 1khz tbd db e n output noise,20-80khz vo=1.8v, io=30ma 18 v rms
vq.qw wppiqpwe cc confidential page 8/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 6 typical characteristics dc-dc efficiency vs. load(3.8vin) dc-dc load transient(typical)
vq.qw wppiqpwe cc confidential page 9/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 dc-dc ripple v ref vs temperature
vq.qw wppiqpwe cc confidential page 10/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 v trgt vs temperature off mode current vs v bat
vq.qw wppiqpwe cc confidential page 11/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 7 pin description num name type condition function description 1 sda io data pin for serial interface,normally it connects a 2.2k resistor to 3.3v i/o power 2 sck i the clock pin for seri al interface,normally it connects a 2.2k resistor to 3.3v i/o power 3 gpio3 io reg9eh[7] gpio 3 4 n_oe i power output on/off switch gnd:on ipsout:off 5 gpio2 io reg92h[2:0] gpio 2 6 n_vbusen i vbus to ipsout selection gnd:ipsout select vbus high:ipsout do not select vbus 7 vin2 pi dcdc2 input source 8 lx2 io inductor pin for dcdc2 9 pgnd2 g nmos ground for dcdc2 10 dcdc2 i dc-dc2 feedback pin 11 ldo4 o output pin of ldo4 12 ldo2 o output pin of ldo2 13 ldo24in pi input to ldo2 and ldo4 14 vin3 pi dcdc3 input source 15 lx3 io inductor pin for dcdc3 16 pgnd3 g nmos gnd for dcdc3 17 dcdc3 i feed back to dcdc3 gpio 1 18 gpio1 io reg93h[2:0] adc input gpio 0 low noise ldo/switch 19 gpio0 io reg90h[2:0] adc input 20 exten o external power enable 21 aps pi internal power input 22 agnd g analog ground 23 bias io external 200kohm 1% resistor 24 vref o internal reference voltage 25 pwrok o power good indication output 26 vint po internal logic power, 2.5v 27 pwren io it is the power domain enable signal 28 ldo1 o ldo1 output for host rtc block
vq.qw wppiqpwe cc confidential page 12/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 29 dc3set io it set the dcdc3 default voltage 30 backup io backup battery pin 31 vbus pi usb vbus input 32 33 acin pi adapter input 34 35 ipsout io main battery 36 chgled o charger status indication 37 ts i battery temperature sensor input or external adc input 38 39 bat po system power source 40 ldo3in o ldo3 input source 41 ldo3 i output pin of ldo3 42 batsense i pwm charger current sense port1 43 chsense o pwm charger current sense port2 44 vin1 pi pwm charger input source 45 lx1 io inductor pin for pwm charger 46 pgnd1 g nmos ground for pwm charger 47 pwron i power on-off key input 48 irq io irq output 49 ep g exposed pad, need to connect to system ground
vq.qw wppiqpwe cc confidential page 13/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 8 functional block diagram bat bat temperature monitor output voltage monitor/lbo ldo2 dc-dc3 dc-dc2 serial interface ldo4 ips irq sck sda vbus ipsout aps control logic pwron pwren gpio1 gpio0/ldoio0 gpio2 dc3set pwrok agnd ep batsense ldo1 n_rsto reference voltage ts n_vbusen acin register chgled bias chsense 12 bit adc current monitor voltage monitor temperature monitor ldo2 ldo4 ldo1 lx2 dcdc2 pgnd2 vin2 lx3 dcdc3 pgnd3 vin3 vref backup ldo24in vint n_oe pwm charger lx1 pgnd1 vin1 ldo3 ldo3 exten ldo3in
vq.qw wppiqpwe cc confidential page 14/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 9 control and operation once AXP202 is powered on, sck/sda pin of twsi will be pulled up to io power and then host can adjust and monitor AXP202. remarks: ?host? here refers to system processor. remarks: ?external power? below includes acin and vbus input. 9.1 power on/off & reset power enable key (pek) the power enable/ sleep/wak eup key can be connect ed between pwron pin and gnd of AXP202. AXP202 can automatically identif y the ?long-press? and ?short-press? and then correspond respectively. power on source 1. acin vbus and battery 2. n_oe changes from high to low 3. pek power on system power-on is initiated whenev er the following conditions occur: 1. n_oe is low and a valid power source has pl ugged in (acin or vbus>3.8v, and battery voltage is higher than power off voltage), AXP202 will be tu rned on. ( developer can decide whether AXP202 shall be turned on when there is a valid power source plugging in) 2. n_oe is low and the system is powered off, press pek can power on axp 202 (in application, host alarm output signal can be connect ed to pwron and parallel with pek. whenever there is a valid alarm signal ((low level)), AXP202 can be powered on). 3. when there is a external power source or battery, when n_oe changes from high to low, AXP202 will be turned on. after power on, dc-dc and ldo will be soft booted in preset timing sequence, and then either host or pwren pin can enable/disabl e corresponding power.
vq.qw wppiqpwe cc confidential page 15/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 power off when you push-and-hold pek longer than irqlevel, host can write ?1? into?reg32h [7]? to inform AXP202 to shutdown, which can disable all power output except ldo1. system power-off is initiated whenev er the following conditions occur: 1. input voltage is too lo w( low-power protection) 2. power output voltage is too low due to overload( overload protection) 3. input voltage is too high( ov ervoltage protection)( see more deta ils in chapter ? intelligent power select? 4. have waited more than 2s(default) when n_oe changes from hight to low 5. push pek longer more than offlevel( default 6s), and system will cut off all power output except ldo1( there is no need for an extra reset key) remarks: with the automatic prot ection mechanism, AXP202 can protec t whole system by preventing components from irriversable damage due to system abnormality. sleep and wakeup when the running system needs to enter sleep mode, reg31h [3] will determine whether one or several power rails should be disabled or change to other voltage. wakeup can be triggled by either pek signal, or the rising/falling edge of gpio0 gpio1 gpio2 gpio3 (to be the rising or falling edge, or both can be programmed by reg90h[7:6] reg92h[7:6] reg93h[7:6] and reg95h[7:6]), with all power rails resume to default voltage in default power on timing sequence. note: pek irq reg42h[1] gpio0 input edge irq reg44h[0] gpio1 input edge irq reg44h[1] gpio2 input edge irq reg44h[2] gpio3 input edge ir reg44h[3] should be ?enable? to notify the processor to exit sleep mode via irq pin. see control process under sleep and wakeup modes as below:
vq.qw wppiqpwe cc confidential page 16/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 system reset and output monitoring (pwrok) the pwrok in AXP202 can be used as the reset signal of application system. during AXP202 startup, pwrok outputs low level, which will then be pulled high to startup and reset the system after each output voltage reaches the regulated value. when application system works normally, AXP202 w ill be always monitoring the voltage and load status. if overload or under-volt age occurs, the pwrok will instantly drive low to reset the system and prevent data losses. 9.2 power path management (ips) power input of AXP202 may come from li-battery, usb vbus input, external power acin (such as ac adapter). ips can select proper power accordi ng to external power and li-battery status. o if only li-battery is available, and no external power input, li-battery is used for power input; o if external power is available (vbus or acin), it is preferred in power supply write ?1? to reg31h[3] to start the sleep and pmu will save reg12h setting at that time disable corresponding power or modify the voltage sleep and wait to be wakeup wakeup restore the power to the default output voltage. y n
vq.qw wppiqpwe cc confidential page 17/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 o if li-battery is available, it will ?seamlessly?switch to li-battery once external power is removed o when both vbus and acin are available, acin will be applied to supply power in priority, and li-battery will be charged. o if acin drive capability is not enough, vbus will be enabled to achieve acin/vbus common power supply. o if the drive capacity is still insufficient, c harge current will be reduced to zero, and battery is used for power supply. therefore, compatibility of the system with external power s of different drive ability can be dramatically improved, and no s pecial customized adapters are requi red to be provided on the part of manufacturers. please refer to the following diagram. as shown above, when acin prov ides insufficient load ability, ipsout voltage will fall, and bat will change from charge to discharge to s upply load current together with acin. host can set ips parameters and read the feedback by visiting internal registers in AXP202 via twsi. voltage-limit/ current-limit mode and direct mode
vq.qw wppiqpwe cc confidential page 18/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 in order not to affect the usb communication, vb us is always working under voltage-limit mode by default. in this mode, AXP202 ensures that vbus voltage remains above a configurable reference voltage vhold which can meet the usb specification. the default vhold is 4.4v, adjustable in reg30h [5:3] register. if the system has limit on current obtained from usb vbus, a current-limit mode is provided (see reg30h[1] register), with 900ma/500 ma/100ma (reg30h [0]) selectable. if the system just utilizes the usb for power s upply rather than communication, or the usb power adapter is utilized, AXP202 can be set to ?vbus dire ct mode? by modifying register reg30h[6], and then AXP202 will give priority to t he application power demand. when t he drive ability of usb host is insufficient or system power consumption is large then the vbu s voltage is lower than vhold, AXP202 will release irq to indicate the weak power supply ability of host vbus, which may affect usb communication, and then host software will follow up. AXP202?s reaction to external power supply plugin AXP202 can automatically det ect the plugin of external powersand judge whether the power is usable or not. the result will be set in corresponding regist ers, and irq will be released to inform the host at the same time. the following table has listed the status bits and meanings of external power registers. register status bits description reg00h[7] indicating the presence of external acin reg00h[6] indicating whether the ex ternal acin is usable or not reg00h[5] indicating the presence of external vbus reg00h[4] indicating whether the external vbus is usable or not reg00h[3] indicating whether the vbus voltage is above v hold when used reg00h[1] indicating whether acin/ vbus short circuits on pcb or not reg00h[0] indicating whether the system is triggered to startup by acin/vbus or not the status bit of ?indicating whether the vbus voltage is above v hold or not when used? enables the host to judge when it receives irq7(indicating weak supply ability)whethe r vbus is pulled low by system load input or the external power itself is below v hold , which may facilitate host software to decide either to keep on working in voltage- limit mode or switch to direct mode. when to select vbus as input power n_vbusen and register reg30h[7]: is used to determined when shall vbus be used as power
vq.qw wppiqpwe cc confidential page 19/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 supply. n_vbusen reg30h[7] input power description low 0 vbus select if vbus is valid and no acin is available low 1 vbus high 1 vbus select if vbus is valid high 0 acin/bat not select vbus low-power warning and low-power protection (automatic poweroff) with AXP202, the value of v warning (low-power warning voltage) and v off (automatic shutdown voltage) can be set. if the system pow er is found to be lower than v warning, irq19/irq20 will be released. if aps is lower than v off, AXP202 will automatically ent er shutdown mode, and di sable all other outputs except ldo1. there are two-levels in v warning , namely, level 1 and level 2, whic h can be defined differently in applications. for example, use level1 to indicate insufficient power while level 2 can be used to indicate the oncoming shutdown. the default values of v warning and v off can be respectively set in registers reg3ah reg3bh and reg31h[2:0]. over-voltage protection if the external power voltage exceeds 6.3v, AXP202 will release irq1/4 for indication. if the external power voltage exceeds 7v, AXP202 will automatically shut down the system. 9.3 adaptive pwm charger AXP202 integrates a constant curren t/voltage pwm charger to automatic ally control the charge cycle, with a built-in safety clock capable of automatic c harge termination without proc essor intervention. this charger features automatic charge current scaling in accordance wi th the system power consumption, as well as battery detection, trickle charge and activation. in additi on, the built-in tem perature detection circuit can automatically decrease the charge current when the te mperature is too high or too low. compared with traditional linear charge, this pwm charger features dramatic efficiency increase and power consumption decrease in sy stems that require large power consumption and fast battery charging, and thus great ly improve the system temperature performance. adaptive charge startup
vq.qw wppiqpwe cc confidential page 20/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 the default state of the charger is ?enable?. (it c an be programmed via registers. refer to register reg33h.) when external power is plugged in, AXP202 w ill firstly judge whether it is chargeable. if the charger is suitable for the power, and the charge f unction is usable, AXP202 will automatically start the charge, and send irq to host for indication. at th e same time, ghgled pin will output low level to drive external led to indicate the charging state. charge voltage/current : i trkl v trkl i chrg v trgt two symbolic voltages v trgt =charge target voltage. the v trgt is 4.2v by default, which c an be set by register (refer to?reg33h[6:5]?) . at the same time, AXP202 will autom atically adjust the charge target voltage when external power voltage is low. v rch =automatic recharge voltage. v rch =v trgt -0.1v charge current the charge current is 500maor 1200ma by def ault, which can be set by reg33h [3:0]. charge process if the battery voltage is lower than 3.0v, the charger will automatically enter t he pre-charge mode, with charge current be 1/10 of the preset value. if the battery voltage is still below 3.0v 40 minutes later (adjustable, see ?reg34h ?), charger will automatically enter t he battery activate mode. refer to ?battery activate mode? section for details.
vq.qw wppiqpwe cc confidential page 21/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 once the battery voltage exceeds 3.0v, the charger enters constant current m ode. if the charge current is below 65% of the preset value, the system will release irq17 to indicate that ?drive ability of external power is insufficient, as a result, the charge current is lower than the preset value, which may lead to longer charge time, so stronger power is preferr ed, or the power-consum ing functions should be disabled to shorten the charge time.? when the battery voltage reaches the v trgt, the charger will switch from the constant current mode to constant voltage mode, and t he charge current will fall. when the charge current is lower t han 10% or 15% (adjustabl e, see register ?reg 33h?) of the preset value, a charge cycle ends, and axp 202 will release irq18 while the chgled pin will stop indicating the charging state. when the battery voltage is below v rch again, the automatic charge will restart, and irq17 will be released. in non-precharge mode, if the charge cycle is not ending after 480 minutes (adjustable, refer to register ?reg34h?), the charger w ill automatically enter the battery activate mode. battery activate mode at the enterring the battery activa te mode from either pre-charge m ode or constant current mod(the timer expires), AXP202 will release irq10 in both case s to indicate that the battery may be damaged. in battery activate mode, the charger always inputs relatively low current to batteries. AXP202 will exit activate mode and release irq11 only if the battery voltage has reached v rch. AXP202 will indicate whether the charger is in batte ry activate mode or not in register reg01h. chgled chgled pin is used to indicate charge state and warnin g. there are four states , namely, charging, not charging, battery abnormal warning, and external power over-voltage warning. chgled is nmos open drain output, so a led can be directly driven by a current-limit resistor to show the four states. the following table has displayed its two operation modes. reg34h[4] status performance remark charging low level not charging high resistance battery abnormal 1hz flicker the charger enters t he battery activate mode, or the battery temperature is too high/low. 0 over-voltage 4hz flicker external voltage input is too high. charging 1hz flicker 1 non-chargeable high no external power is available.
vq.qw wppiqpwe cc confidential page 22/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 resistance not charging low level over-voltage 4hz flicker external volt age input is too high, or the battery temperature is too high/low. battery temperature detection AXP202 can connect a temperature-s ensitive resistor via the ts pin to monitor the battery temperature when the battery is charging or discharging. the diagram is shown below. ntc ts bat c2 10uf gnd in the diagram above, vth/vtl refer to the high tem perature threshold and low temperature threshold, which is programmable via registers reg38h /39h/3ch/3dh respectively. vte=0.2v. the temperature-sensitive resi stor is suggested to choos e the ntc temperature-sens itive resistor, which is 10kohm and 1% accuracy at 25 . AXP202 will send constant current via ts pin, and the current can be set as 20ua 40ua 60ua and 80ua (see registerreg84h) to adapt to different ntc resistors. when the current goes through the temperature-sensitive resistor, a test voltage is generated, which will be measured by adc, and compared with regul ated value to releas e corresponding irq or suspend the charge. if the resistance value of temperatur e-sensitive resistor is too high or too low, extra resistors can be serial or parallel connected to expand the detect extent. if the battery is free from temperature-sensitive resi stor, ts pin can be linked to the ground, and in that case, AXP202 will automatically disable the battery temperature monitoring function. battery detection
vq.qw wppiqpwe cc confidential page 23/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 AXP202 will automatically detect the ba ttery presence, record the result in registers (refer to reg01h) and release irq13, irq14. the battery detection can be enabled and disabled by host. (refer to register reg32h.) 9.4 backup batttery AXP202 supports backup battery charge and discharge . when no main power (bat/acin/vbus) is available, ldo1 will choose the ba ckup battery to support the operation of some circuits, such as the system real-time clock, etc. when there is a main power, reg35h[7] can be set to charge the backup battery, whose target voltage is 3.0v by default (adjustable via reg35h[6:5]) and charge current is 200ua by default ( adjustable via reg35h[1:0]). 9.5 multi-power outputs the following table has listed the multi- power outputs and their functions of AXP202. output path type default voltage application examples drive ability dcdc2 buck configurabl e 1.25vcore 1800 ma dcdc3 buck configurable 2.5vddr 1000 ma ldo1 ldo configurable rtc 30 ma ldo2 ldo configurable analog/fm 200 ma ldo3 ldo configurable 1.3v pll 200 ma ldo4 ldo configurable 1.8v hdmi 200 ma ldo5 ldo configurable vmic 50 ma AXP202 comes with two synchronous step-down dc-dcs, five ldos, as well as multiple timing and controlling methods. the work fr equency of dc-dc is 1.5mhz by def ault, which is adjustable via registers. external small inductors and capacitors can be connected as well. in addition, both dc-dcs can be set in pwm mode or auto mode (automatically switchable acco rding to the AXP202 load). see register reg80h. dc-dc2/3 dcdc3 output voltage ranges from 0.7 v to 3.5v and output voltage of dcdc2 is ranged from 0.7-2.275v which can be programmed via registers. (refer to ? register reg23h 27h?). dcdc2/3 output capacitor is recommended to us e small esr ceramic capacitors above 10uf x7r
vq.qw wppiqpwe cc confidential page 24/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 when the output voltage is set above 2.5v 2.2uh inductors is recommende d; when the output voltage is set under 2.5v 4.7uh inductors is recommended. besides, the inductor saturation current should be larger than 50% of the largest demanded current in power circuitry. inductor recommendation list: inductors module no. current spec dc internal resistance murata lqh55pn2r2nr0 2100ma@2.2uh 30mohm murata lqh55pn4r7nr0 1400ma@4.7uh 60mohm murata lqh44pn2r2mp0 2000ma@2.2uh 49mohm murata lqh44pn4r7mp0 1700ma@2.2uh 80mohm tdk vlf5010st-2r2m2r3 2700ma@2.2uh 41mohm tdk vlf5014st-4r7m1r7 1700ma@4.7uh 98mohm tdk slf6045t-4r7n2r4-3pf 2400ma@4.7uh 27mohm capacitors module no. temperature spec allowance tdk c2012x5r0j475k x5r/x7r 10%@4.7uf tdk c2012x5r0j106k x5r/x7r 10%@10uf murata grm31e71a475k x7r 10%@4.7uf murata grm21e71a106k x7r 10%@10uf murata grm31e71a106k x7r 10%@10uf ldo 1 ldo1 is always on and can be used to supply continuous power for application rtc with 30ma drive ability 30ma. ldo2/3/4 ldo2/4 output noise is as low as 18uvrms and can be used to supply power for analog circuits of application system. ldo3 can supply power for syst ems like sram or pll with 200ma drive ability. ldo5 ldo5 also features the low noise design, and its drive ability is 50ma soft start all dc-dcs and ldos support soft start which can av oid the impact of dram atic current change on the input path in system boot stage. self-diagnosis: load monitoring and current-limit protection
vq.qw wppiqpwe cc confidential page 25/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 all dc-dcs and ldos support load monitoring and current-limit f unctions. when the load current exceeds its drive ability, all output voltage will decreas e to protect the internal circuits. when the two dc-dcs output voltage is lower than 85% of the se t voltage, AXP202 will automat ically shutdown. at the same time, the system will record the detailed output voltage that has le ad to automatic shutdown (refer to register reg46h[5:2]) and release corresponding irq. all dc-dcs do not require external schottky diodes and resister divider feedback circuits. if a certain dc-dc is unnecessary in application, ju st float the corresponding lx pins. 9.6 default voltage/timing setting the default voltage and boot timing of each power can be set by AXP202. boot timing includes eight levels, and the in terval between each level can be set as 1 4 16 and 32ms. default voltage setting: each dc-dc/ldo setting r anges from the lowest voltage to the highest voltage. dc3set pin is used to set the prelimirary voltage of dc-dc3 dc3set dc3setgnd dc3setto oaps dc3set floating dc-dc3 voltage 1.8v 3.3v/2.5v 1.2v/1.5v 9.7 signal capture ordinary battery monitor estimate the battery energy by measuring the battery voltage. however, the multiple 12-bit adcs in AXP202 can measure battery voltage, as well as battery current and external power voltage and current. it also integrates batte ry charge and discharge coulomb counter. according to these data, host is capable of calculating accurately the battery energy and other battery data, such as the system real-time consumption, remaining battery energy , battery charge progress, remaining battery using time and charge time, etc. the enable state controlling and sampling rate of each adc can be set via registers reg82h 83h 84h. the sampling results will be saved in corresponding registers and reference can be made to the adc data in register instruction se ction. the input range of gpio[1:0] can be set via register reg85h while register reg00h[2] is used to indicate the battery charge/discharge current directions. channel 000h step fffh battery voltage 0mv 1.1mv 4.5045v bat discharge current 0ma 0.5ma 4.095a
vq.qw wppiqpwe cc confidential page 26/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 bat charge current 0ma 0.5ma 4.095a acin volatge 0mv 1.7mv 6.9615v acin current 0ma 0.625ma 2.5594a vbus voltage 0mv 1.7mv 6.9615v vbus current 0ma 0.375ma 1.5356a internal temperature -144.7 0.1 264.8 aps voltage 0mv 1.4mv 5.733v ts pin input 0mv 0.8mv 3.276v gpio0 0/0.7v 0.5mv 2.0475/2.7475v gpio1 0/0.7v 0.5mv 2.0475/2.7475v 9.8 multi-function pin description gpio[3:0] can be defined as gpio[3:0], adc input monitoring external signals , or ldo, etc. please refer to reg90h-96h instruction for details chgled features charge state indication, over-temperature/over-voltage warn ing, and gpo. please refer to reg32h instruction section for details. 9.9 timer AXP202 features a 7-bit internal timer, w hose values can be programmed via register reg8ah[6:0]. the minimum time st ep of timer is one minute, and t he timing range is 1~127 minutes.
vq.qw wppiqpwe cc confidential page 27/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 9.10 twsi and irq ? ? ? ? ? ? ? ? ? ? ? ? ? ? fig.1: single read and write fig.2:multi read and write host can visit AXP202 registers via the twsi in terface, and the operation timing is listed above.
vq.qw wppiqpwe cc confidential page 28/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 standard 100khz or 400khz frequenc y is supported, and the highest rate can reach 1.2khz. in addition, multi read and write ope ration is supported, and the devic e addresses are 69h (read) and 68h (write). when certain events occur, AXP202 will inform host by pulling down the irq interrupt mechanism, and the interrupt state will be reserved in interrupt state registers (see registers reg48h, reg49h, reg4ah, reg4bh and reg4ch). the interrupt can be cleared by writing 1 to corresponding state register bit. when there is no interrupt, irq output will be pulled high (51k resistance higher through the external). each interrupt can be masked via interr upt control registers (refer to registers reg40h, reg41h, reg42h, reg43h, and reg44h). reg irq description reg irq description reg48h[7] irq1 acin over voltage reg 4ah[3] irq20 dcdc3 voltage too long reg 48h[6] irq2 acin plug in reg 4ah[2] reserved reg 48h[5] irq3 acin removal reg 4ah[1] irq22 pekshort-press reg 48h[4] irq4 vbus over voltage reg 4ah[0] irq23 pek long-press reg 48h[3] irq5 vbus plug in reg 4bh[7] irq24 n_oe power on reg 48h[2] irq6 vbus removal reg 4bh[6] irq25 n_oepower off reg 48h[1] irq7 vbus voltage lower than v hold reg 4bh[5] irq26 vbus valid reg 48h[0] reseverd reg 4bh[4] irq27 vbus invalid reg 49h[7] irq8 battery plugin re g 4bh[3] irq28 vbus session valid reg 49h[6] irq9 battery removal re g 4bh[2] irq29 vbus session end reg 49h[5] irq10 enter battery activate mode reg 4bh[1] irq30 low power level1 reg 49h[4] irq11 exit battery activate mode reg 4bh[0] irq31 low power level2 reg 49h[3] irq12 charging reg 4ch[7] irq32 timer interrupt reg 49h[2] irq13 charge done reg 4ch[6] irq33 pek rising edge reg 49h[1] irq14 battery temp toor high reg 4ch[5] irq34 pek falling edge reg 49h[0] irq15 battery temp too low reg 4ch[4] reserved reg 4ah[7] irq16 die temp too hi gh reg 4ch[3] irq35 gpio3 input edge trigger reg 4ah[6] irq17 charge current insufficient reg 4ch[2] irq36 gpio2 input edge trigger reg 4ah[5] irq18 dcdc1voltage too long reg 4ch[1] irq37 gpio1 input edge trigger reg 4ah[4] irq19 dcdc2 voltage too long reg 4ch[0] irq38 gpio0 input edge trigger
vq.qw wppiqpwe cc confidential page 29/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 10. registers group 1: power control address register description r/w default value 00 power status register r 01 power mode/ charge state register r 02 otg vbus state register r 04-0f data buffer register r/w 00h 12 dc-dc2/3 & ldo2/3/4&exten control register r/w xxh 23 dc-dc2 voltage setting register r/w xxh 25 dc-dc2/ldo3 voltage ramp parameter setting register r/w 00h 27 dc-dc3 voltage setting register r/w xxh 28 ldo2/3 voltage setting register r/w xxh 30 vbus-ipsout channel setting register r/w 60h 31 v off shutdown voltage setting register r/w x3h 32 shutdown, battery det ection, chgled control register r/w 46h 33 charge control register1 r/w cxh 34 charge control register2 r/w 41h 35 backup battery charge control register r/w 22h 36 pek parameter control register r/w 5dh 37 dcdc converter work frequency setting register r/w 08h 38 battery charge under-temperature warning setting register r/w a5h 39 battery charge over-temperature warning setting register r/w 1fh 3a aps low-power level1 setting register r/w 68h 3b aps low-power level2 setting register r/w 5fh 3c battery discharge under-temperature warning setting register r/w fch 3d battery discharge over-temperature warning setting register r/w 16h 80 dcdc work mode setting register r/w e0h 82 adc enable setting register1 r/w 83h 83 adc enable setting register2 r/w 80h
vq.qw wppiqpwe cc confidential page 30/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 84 adc sample rate setting ts pin control register r/w 32h 85 gpio [1:0] input range setting register r/w x0h 86 gpio1 adc irq rising edge threshold setting r/w ffh 87 gpio1 adc irq falling edge threshold setting r/w 00h 8a timer control register r/w 00h 8b vbus monitoring setting register r/w 00h 8f over-temperature shutdown control register r/w 01h group 2 gpio control address register description r/w default value 90 gpio0 control register r/w 07h 91 ldo5 output voltage setting register r/w a0h 92 gpio1 control register r/w 07h 93 gpio2 control register r/w 07h 94 gpio[2:0] signal status register r/w 00h 95 gpio3 control register r/w 00h group3 interrupt control address register description r/w default value 40 irq enable control register1 r/w d8h 41 irq enable control register2 r/w ffh 42 irq enable control register3 r/w 3bh 43 irq enable control register4 r/w c1h 44 irq enable control register5 r/w 00h 48 irq status register1 r/w 00h 49 irq status register2 r/w 00h 4a irq status register3 r/w 00h 4b irq status register4 r/w 00h 4c irq status register5 r/w 00h group4 adc data address register description r/w 56[7:0] acin voltage adc data high 8 bits r 57[3:0] acin voltage adc data low 4 bits r 58[7:0] acin current adc data high 8 bits r 59[3:0] acin current adc data low 4 bits r 5a[7:0] vbus voltage adc data high 8 bits r
vq.qw wppiqpwe cc confidential page 31/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 5b[3:0] vbus voltage adc data low 4 bits r 5c[7:0] vbus current adc data high 8 bits r 5d[3:0] vbus current adc data low 4 bits r 5e[7:0] AXP202 internal temperature monitoring adc data high 8 bits r 5f[3:0] AXP202 internal temperature monitoring adc data low 4 bits r 62[7:0] ts input adc data high 8 bits default monitoring battery temperature r 63[3:0] ts input adc data low 4 bits default monitoring battery temperature r 64[7:0] gpio0 voltage adc data high 8 bits r 65[3:0] gpio0 voltage adc data low 4 bits r 66[7:0] gpio1 voltage adc data high 8 bits r 67[3:0] gpio1 voltage adc data low 4 bits r 70[7:0] battery instantaneous power high 8 bits r 71[7:0] battery instantaneous power middle 8 bits r 72[7:0] battery instantaneous power low 8 bits r 78[7:0] battery voltage high 8 bits r 79[3:0] battery voltage low 4 bits r 7a[7:0] battery charge current high 8 bits r 7b[3:0] battery charge current low 4 bits r 7c[7:0] battery discharge current high 8 bits r 7d[4:0] battery discharge current low 5 bits r 7e[7:0] system ipsout voltage high 8 bits r 7f[3:0] system ipsout voltage low 4 bits r note: the battery power formula: pbat =2* register value * voltage lsb * current lsb / 1000. (voltage lsb is 1.1mv; current lsb is 0.5m a, and unit of calculation result is mw.) address register description r/w default value b0 battery charge coulomb counter data register[31:24] r/w 00h b1 battery charge coulomb counter data register[23:16] r/w 00h b2 battery charge coulomb count er data register[15:8] r/w 00h b3 battery charge coulomb count er data register[7:0] r/w 00h b4 battery discharge coulomb counter data register[31:24] r/w 00h b5 battery discharge coulomb counter data register[23:16] r/w 00h b6 battery discharge coulomb counter data register[15:8] r/w 00h b7 battery discharge coulomb counter data register[7:0] r/w 00h
vq.qw wppiqpwe cc confidential page 32/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 b8 coulomb counter control register r/w 00h b9 fuelguage result register r/w 00h coulomb calculation formula: c= 65536 * current lsb * charge coulomb counter value - discharge coulomb counter value / 3600 / adc sample rate. refer to reg84h setting for adc sample rate the current lsb is 0.5ma unit of the calculation result is mah. reg 00h: power input status bit descripiton r/w 7 acin presence indication 0:acin not exist 1:acin exists r 6 indicating whether acin is usable r 5 vbus presence indication 0:vbus not exist 1:vbus exists r 4 indicating whether vbus is usable r 3 indicating whether the vbus voltage is above v hold before used. r 2 indicating the battery current direction 0: the battery is discharging 1: the battery is charging r 1 indicating whether acin and vbus input short circuit on pcb r 0 indicating whether the boot source is acin or vbus 0: boot source isn?t acin/vbus 1: boot source is acin/vbus. r reg 01h: power working mode and charge status indication bit descripiton r/w 7 indicating whether AXP202 is over-temperature 0: not over-temperature 1: over-temperature r 6 charge indication 0:not charge or charge finished 1: in charging r 5 battery existence indication 0:no battery connected to AXP202 1:battery already connected to AXP202 r 4 reserved and unchangeable r 3 indicating whether the batte ry enters the activate mode 0: not enter the activate mode 1: already entered the activate mode r 2 indicating whether the charging current is lower than the expected current 0:actual charging current is the same as expected current 1: actual charging current is lower than expected current r 1-0 reserved and unchangeable r
vq.qw wppiqpwe cc confidential page 33/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 02h:usb otg vbus status indication bit descripiton r/w 7-3 reserved and unchangeable 2 indicating whether vbus is valid or not 1 means ?valid? r 1 indicating whether vbus session a/b is valid 1 means ?valid? r 0 indicating session end status 1 means ?valid? r reg 04-0fh: data cache note: as long as one of the exte rnal powers, batteries or backup batteries exists, this data will be reserved and free from the startup and shutdown influence. reg 12h: power output control default value:xxh bit descripiton r/w default value 7 reserved and unchangeable rw x 6 ldo3 enable and disable control 0: disable 1: enable rw x 5 reserved and unchangeable rw x 4 dc-dc2 enable and disable control rw x 3 ldo4 enable and disable control rw x 2 ldo2 enable and disable control rw x 1 dc-dc3 enable and disable control rw x 0 exten enable and disable control 0: disable 1: enable rw x reg 23h:dc-dc2 output voltage setting default value: xxh bit descripiton r/w default value 7-6 reserved and unchangeable 5-0 dc-dc2 output voltage setting [5:0] 0.7-2.275v 25mv/step vout=[0.7+(bit5-0)*0.025]v rw x
vq.qw wppiqpwe cc confidential page 34/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 25h:dc-dc2/ldo3 dynamic vo ltage scaling parameter setting default value:00h bit description r/w default value 7-4 reserved and unchangeable 3 ldo3 vrc enabling control 0: enable 1: disable rw 0 2 dc-dc2 vrc enabling control 0: enable 1: disable rw 0 1 ldo3 vrc voltage rising slope control 0: 25mv/15.625us=1.6mv/us 1: 25mv/31.250us=0.8mv/us rw 1 0 dc-dc2 vrc voltage rising slope control 0: 25mv/15.625us=1.6mv/us 1: 25mv/31.250us=0.8mv/us rw 0 reg 27h:dc-dc3 output voltage setting default value: xxh bit description r/w default value 7 reserved and unchangeable 6-0 dc-dc3 output voltage setting 0.7-3.5v 25mv/step vout=[0.7+(bit6-0)*0.025]v rw x reg 28h:ldo2/4 output voltage setting default value: xxh bit description r/w default value 7-4 ldo2 output voltage setting 1.8-3.3v 100mv/step vout=[1.8+(bit7-4)*0.1]v rw x 3-0 ldo4 output voltage setting 1.25 1. 3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.5 2.7 2.8 3.0 3.1 3.2 3.3 rw x reg 29h:ldo3 output voltage setting default value: xxh
vq.qw wppiqpwe cc confidential page 35/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 bit description r/w default value 7 ldo3 mode select 0 ldo mode voltage can be set by [6:0] 1 enable/disable control mode and voltage is determined by ldo3in. rw 0 6-0 ldo3 output voltage setting bit6-bit0 0.7-2.275v 25mv/step vout=[0.7+(bit6-0)*0.025]v rw x reg 30h:vbus-ipsout power path management default value: 6xh bit description r/w default value 7 the vbus-ipsout path select c ontrol signal when vbus is usable 0: whether to enable the path is decided by n_vbusen pin 1:vbus-ipsout can be enabled regardless of the n_vbusen status rw 0 6 vbus v hold voltage-limit control 0: not limit the voltage 1: limit the voltage rw 1 5-3 v hold setting v hold = [4.0+(bit5-3)*0.1]v rw 100 2 reserved and unchangeable 1-0 vbus current-limit selection when current-limit is enabled 00:900ma ; 01:500ma; 10:100m a; 11:not limit rw 0 reg 31h:v off power off voltage setting default value: x3h bit description r/w default value 7-4 reserved and unchangeable 3 pek or gpio edge wakeup function enable setting in sleep mode 0 disable 1 enable this bit will be automatically cleared to 0 after writing so ?1 ?should be rewritten whenever enters the sleep mode. 2-0 v off setting v off =[2.6+(bit2-0)*0.1]v default 2.9v rw 011
vq.qw wppiqpwe cc confidential page 36/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 32h: shutdown setting, battery dete ction and chgled pin control default value: 46h bit description r/w default value 7 shutdown control writing ?1? to this bit will disable the AXP202 output. rw 0 6 battery monitoring function setting bit: 0: disable 1: enable rw 1 5-4 chgled pin function se tting 00: high resistance 01: 25% 1hz flicker 10: 25% 4hz flicker 11: low level output rw 00 3 chgled pin control setting 0: controlled by charging 1: controlled by register reg 32h[5:4] rw 0 2 output disable timing control 0: disable at the same time 1: contrary to the startup timing rw 0 1-0 the delayed shutdown time of AXP202 after n_oe changes from low to high 00: 128ms 01: 1s 10: 2s 11: 3s rw 10 reg 33h: charging control 1 default value: cxh bit description r/w default value 7 charging enable control bit 0: disable 1:enable rw 1 6-5 charging target-voltage setting 00:4.1v 01:4.15v 10:4.2v 11:4.36v rw 10 4 charging end-current setting 0: end when the charge current is lower than 10% of the set value 1: end when the charge current is lower than 15% of the set value rw 0 3-0 charge current setting i charge = [300+(bit3-0)*100] ma rw x reg 34h: charge control 2 default value: 45h bit description r/w default
vq.qw wppiqpwe cc confidential page 37/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 value 7 pre-charge timeout setting bit1 rw 0 6 pre-charge timeout setting bit0 00: 40 min 01: 50min 10: 60min 11: 70min rw 1 5 reserved 4 chgled mode selection 0: always bright when charging 1: flicker when charging rw 0 3-2 reserved and unchangeable 1-0 constant-curr ent mode timeout setting bit1-0 00: 6hours 01: 8hours 10: 10hours 11: 12hours rw 01 reg 35h: backup battery charge control default value: 22h bit description r/w default value 7 backup battery charge enable control 0: disable 1: enable rw 0 6-5 backup battery charge target-voltage setting 00:3.1v 01:3.0v 10:3.6v 11:2.5v rw 01 4-2 reserved and unchangeable 1-0 backup battery charge current setting 00: 50ua 01: 100ua 10: 200ua 11: 400ua rw 10 reg 36h: pek key parameters setting default value: 9dh bit description r/w default value 7-6 startup time setting 00: 128ms 01: 3s 10: 1s 11: 2s. rw 01 5-4 long-press time setting 00: 1s 01: 1.5s 10: 2s 11: 2.5s. rw 01 3 automatic shutdown setting when the key press-time exceeds the shutdown time 0: disable 1: enable rw 1 2 pwrok signal delay after the power startup 0:8ms 1:64ms rw 1 1-0 shutdown time setting 00: 4s 01: 6s 10: 8s 11: 10s. rw 01
vq.qw wppiqpwe cc confidential page 38/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 37h:dc-dc working frequency setting default value: 08h bit description r/w default value 7-4 reserved and unchangeable 3-0 dc-dc enable/disable frequency setting each level changes by 5% default value1.5mhz f=[1+/- (bit3-0)*5%)]*1.5mhz rw 1000 reg 38h: vltf-charge battery charge under-t emperature threshold setting default value: a5h bit description r/w default value 7-0 battery under-temperature threshold setting when the battery is charging, m m*10h when m=a5h, corresponding voltage is 2.112v corresponding voltage ranges from 0v~3.264v rw a5h v ltf-charge = m *10h * 0.0008v reg 39h: vhtf-charge battery charge over-t emperature threshold setting default value: 1fh bit description r/w default value 7-0 the battery over-temperature threshold setting when the battery is charging n n*10h when n=1fh the corresponding voltage is 0.397v corresponding voltage ranges from 0v~3.264v rw 1fh v htf-charge = n *10h * 0.0008v reg 3ah: system ipsout vwarning level1 default value: 68h bit description r/w default value 7-0 system ipsout vwarning level1 rw 68h
vq.qw wppiqpwe cc confidential page 39/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 3bh: system ipsout vwarning level2 default value: 5fh bit description r/w default value 7-0 system ipsout vwarning level2 rw 5fh corresponding voltage setting of reg3ah and reg3bh equ als to (supposing the register value is n): vwarning = 2.8672 + 1.4mv * n * 4 reg 3ch: vltf-discharge battery dischar ging under-temperature threshold setting default value: fch bit description r/w default value 7-0 battery under-temperature threshold setting when the battery is discharging m m*10h when m=fc, corresponding voltage is 3.226v corresponding voltage ranges from 0v~3.264v rw fch v ltf-discharge = m *10h * 0.0008v reg 3dh: vhtf-discharge battery discharging over-temperature threshold setting default value: 16h bit description r/w default value 7-0 the battery over-temperature threshold setting when the battery is discharging n n*10h when n=16h corresponding voltage is 0.282v corresponding voltage ranges from 0v~3.264v rw 16h v ltf-discharge = n *10h * 0.0008v reg 80h:dc-dc working mode selection default value: e0h bit description r/w default value 7-3 reserved and unchangeable 2 dc-dc2 work mode control rw 0 1 dc-dc3 work mode control 0:pfm/pwm automatic switching 1: fixed pwm rw 0 0 reserved and unchangeable
vq.qw wppiqpwe cc confidential page 40/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 82h: adc enable 1 default value: 83h bit description r/w default value 7 battery voltage adc enable rw 1 6 battery current adc enable rw 0 5 acin voltage adc enable rw 0 4 acin current adc enable rw 0 3 vbus voltage adc enable rw 0 2 vbus current adc enable rw 0 1 aps voltage adc enable rw 1 0 ts pin adc function enable 0: disable 1: enable rw 1 reg 83h: adc enable 2 default value: 80h bit description r/w default value 7 AXP202 internal temperature monitoring adc enable 0: disable 1: enable rw 1 6-4 reserved and unchangeable 3 gpio0 adc function enable rw 0 2 gpio1 adc function enable rw 0 1-0 reserved and unchangeable 0: disable 1: enable reg 84h: adc sample rate setting and ts pin control default value: 32h bit description r/w default value 7-6 adc sample rate setting 252 n the sample rate is 25 50 100 200hz respectively. rw 0 5-4 ts pin output current setting: 00:20ua 01:40ua 10:60ua 11:80ua rw 11 3 reserved and unchangeable 2 ts pin function selection 0: battery temperature monitoring function 1: external independent adc rw 0
vq.qw wppiqpwe cc confidential page 41/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 input 1-0 ts pin current output method setting 00: disable 01: current output when charging 10: input when the adc is sampling reducing the power consumption 11: always enable rw 1 reg 85h: adc input range default value: x0h bit description r/w default value 7-2 reserved and unchangeable 1 gpio1 adc input range rw 0 0 gpio0 adc input range 0:0-2.0475v 1:0.7-2.7475v rw 0 reg 86h: gpio1 adc irq rising edge threshold setting default value: ffh bit description r/w default value 7-0 one lsb is 8mv rw ff reg 87h: gpio1 adc irq falling edge threshold setting default value: 00h bit description r/w default value 7-0 one lsb is 8mv rw 00 reg 8ah: timer control default value: 00h bit description r/w default value 7 the timer is timeout write ?1? to clear the status. rw 0 6-0 set the time unit: minute write full 0 to shutdown the timer. rw 0000000
vq.qw wppiqpwe cc confidential page 42/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 8bh: vbus pin detecti on and srp function control default value: 00h bit description r/w default value 7-6 reserved and unchangeable 5-4 vbus valid voltage setting 00:4.0v 01:4.15v 10:4.45v 11:4.55v rw 00 3 vbus valid detect function setting: 0: disable 1: enable rw 0 2 vbus session detect functi on setting: 0: disable 1: enable rw 0 1 discharge vbus discharge function setting 0: to disable the vbu s discharge resistance 1: to enable the vbus discharge resistance rw 0 0 charge vbus charge function setting 0: disable the vbus charge resistance 1: enable the vbus charge resistance and charge the vbus rw 0 reg 8fh: function setting, ove r-temperature shutdown, etc. default value: 21h bit description r/w default value 7-3 reserved and unchangeable rw 0 2 AXP202 internal over-temperature shutdown setting 0: not shutdown 1: shutdown rw 0 1-0 reserved and unchangeable reg 90h: gpio0 function setting default value: 07h bit description r/w default value 7 gpio0 rising edge irq or wakeup function rw 0 6 gpio0 falling edge irq or wakeup function 0 disable 1 enable rw 0 5-3 reserved and unchangeable rw 0
vq.qw wppiqpwe cc confidential page 43/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 2 rw 1 1 rw 1 0 gpio0 pin function setting bit 2-0 000: output low 001: output high 3.3v 010: general input function 011: low noise ldo5 100:adc input 1xx: floating rw 1 reg 91h: ldo5 output voltage and ext en/gpio output hi gh level setting default value: a5h bit description r/w default value 7-4 ldo5 output voltage setting vout=[1.8 +( bit7-4 *0.1]v defalt=1.8+10*0.1=2.8v rw 1010 3 reserved and unchangeable 2-0 exten and gpio[1:0] output high level setting 000:1.8v;001:2.5v; 010:2.8v;011:3.0v;100:3.1v; 101:3.3v;110:3.4v;111:3.5 v rw 101 reg 92h: gpio1 function setting default value: 07h bit description r/w default value 7 gpio1 rising edge irq or wakeup function rw 0 6 gpio1 rising edge irq or wakeup function 0 disable 1 enable rw 0 5-3 reserved and unchangeable rw 0 2-0 gpio1 pin function setting 000: output low 001: output high 3.3v 010: general input function 011: low noise ldo 100:adc input 1xx: floating rw 111 reg 93h:gpio2 function setting default value: 07h
vq.qw wppiqpwe cc confidential page 44/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 bit description r/w default value 7 gpio2 rising edge irq or wakeup function rw 0 6 gpio2 falling edge irq or wakeup function 0 disable 1 enable rw 0 5-3 reserved and unchangeable rw 0 2-0 gpio2 pin function setting 000: output low 001: floating 010: general input function xxx: floating rw 111 reg 94h:gpio[2:0] signal st atus setting and monitoring default value: 00h bit description r/w default value 7 reserved and unchangeable r 6 gpio2 input status r 5 gpio1 input status r 4 gpio0 input status 0: input low level 1: input high level r 3-0 reserved and unchangeable reg 95h:gpio3 setting default value: 00h bit description r/w default value 7 gpio3 rising edge irq or wakeup function rw 0 6 gpio3 falling edge irq or wakeup function 0 disable 1 enable rw 0 5-3 reserved and unchangeable 2 gpio3 function setting 0 nmos open drain output 1 number input function rw 0 1 gpio3 output status 0: output low level nmos enable 1: floating nmos disable rw 1 0 gpio3 input status 0: input high level 1: input low level r
vq.qw wppiqpwe cc confidential page 45/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 40h and 48h: irq enable1 and irq status 1 irq enable1 and reg40h default value: d8h irq status 1 reg48h default value: 00h bit description r/w default value 7-0 the meaning of status bit respecti vely corresponds to each bit of 40h for example bit7 is acin over-voltage irq status bit rw 0 reg 41h and 49h: irq enable2 and irq status2 irq enable2 reg41h default value: ffh bit description r/w default value 7 battery connected, irq enable rw 1 6 battery removed, irq enable rw 1 5 battery activate mode, irq enable rw 1 4 exit battery activate mode, irq enable rw 1 3 be charging, irq enable rw 1 2 charge finished, irq enable rw 1 1 battery over-temperature, irq enable rw 1 0 battery low-temperature, irq enable rw 1 irq status 2 reg49h default value: 00h bit description r/w default value 7-0 meaning of the status bi t respectively corresponds to each bit of 41h. rw 0 bit description r/w default value 7 acin over-voltage, irq enable rw 1 6 acin connected, irq enable rw 1 5 acin removed, irq enable rw 0 4 vbus over-voltage, irq enable rw 1 3 vbus connected, irq enable rw 1 2 vbus removed, irq enable rw 0 1 vbus is available, but lower than v hold, irq enable rw 0 0 reserved and unchangeable rw 0
vq.qw wppiqpwe cc confidential page 46/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 reg 42h and 4ah: irq enable3 and irq status 3 irq enable3 reg42h default value: 03h bit description r/w default value 7 AXP202 internal over-temperature, irq enable rw 0 6 charge current is lower than the set current, irq enable rw 0 5 reserved and unchangeable 4 dc-dc2 output voltage is lower than the set value, irq enable rw 0 3 dc-dc3output voltage is lower than the set value, irq enable rw 0 2 ldo3output voltage is lower t han the set value, irq enable 1 pek short press, irq enable rw 1 0 pek long press, irq enable rw 1 irq enable 3 reg4ah default value: 00h bit description r/w default value 7-0 meaning of the status bi t respectively corresponds to each bit of 42h. rw 0 reg 43h and 4bh: irq enable4 and irq status 4 irqenable4 reg43h default value: 01h bit description r/w default value 7 n_oe startup, irq enable rw 0 6 n_oe shutdown, irq enable rw 0 5 vbus valid, irq enable rw 0 4 vbus invalid, irq enable rw 0 3 vbus session a/b irq enable rw 0 2 vbus session end irq enable rw 0 1 aps low-voltage, irq enable level1 rw 0 0 aps low-voltage, irq enable level2 rw 1 irq status 4 reg4bh default value: 00h bit description r/w default value 7-0 meaning of the status bi t respectively corresponds to each bit of 43h. rw 0 reg 44h and 4c:irq enable 5 and irq status 5 irqenable5 reg44h default value: 00h
vq.qw wppiqpwe cc confidential page 47/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 bit description r/w default value 7 timer timeout, irq enable rw 0 6 pek press rising edge, irq enable rw 0 5 pek press falling edge, irq enable rw 0 4 reserved and unchangeable rw 0 3 gpio3 input edge trigger, irq enable rw 0 2 gpio2input edge trigger, irq enable rw 0 1 gpio1input edge trigger or adc input, irq enable rw 0 0 gpio0 input edge trigger, irq enable rw 0 irq status 5 reg4ch default value: 00h bit description r/w default value 7-0 meaning of the status bi t respectively corresponds to each bit of 44h rw 0 note: writing 1 to all irq status regist er bits will clear corresponding status. reg b8h: coulomb counter control default value: 00h bit description r/w default value 7 coulomb counter enable/ disable control rw 0 6 coulomb counter suspend c ontrol. writing ?1? to this bit will suspend the coulomb counter, and this bit will be automatically cleared to 0 as well. rw 0 5 coulomb counter clear cont rol. writing ?1? to this bit will clear the coulomb counter, and this bit will automatically be cleared to 0. rw 0 4-2 reserved and unchangeable rw 0 1-0 decrypt the start bit. automatically clear to 0 after the decryption. rw 0 0 whether the decrypti on has finished or not 0 not finished 1 finished rw 0 reg b9h: fuelguage result default value: 7fh bit description r/w default value 7 fuelguage system control 0 normal work mode 1 work suspension rw 0 6-0 fuelguage result, percentage r 7f
vq.qw wppiqpwe cc confidential page 48/48 www.x-powers.com single cell li-battery pwm charger and power system management ic AXP202 11 package ? 2011 x-powers limited - all rights reserved x-powers cannot assume responsibility for use of an y circuitry other than circuitry entirely embodied in a x-powers product. no circuit patent licenses copyrights or other intellectual property rights are implied. x-powers reserves the right to make changes to the specifications and products at any time without notice.

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