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product structure : silicon monolithic integrated circuit this product has no designed protection against radioactive rays . 1/ 27 ts z02201 - 0h1h0b101160 - 1 - 2 ? 20 1 5 rohm co., ltd. all rights reserved. 08.sep.2015 rev.001 tsz22111 ? 1 5 ? 001 www.rohm.com dc brushless fan motor drivers three - phase full - wave fan motor driver b d 6717 3 nux general description BD67173NUX is a three - phase sensorless fan motor driver used to cool off notebook pcs. it is controlled by a variable speed provided through the pwm in put signal. its feature is sensorless drive which doesnt require a hall device as a location detection sensor and motor downsizing can be achieved by limiting the number of external components as much as possible. furthermore, introducing a direct pwm so ft switched driving mechanism achieves silent operations and low vibrations. features ? speed controllable by pwm input signal ? sensorless drive ? soft switched drive quick start ? power save function ? internal rnf resistance ? quick start functio n applications ? sm all fan motor for notebook pcs etc. key specification s ? operating supply voltage range: 2.2v to 5.5v ? operating temperature range: - 25c to +95c package (s) w(typ) x d(typ) x h(max) vson010x3030 3.00mm x 3.00mm x 0.60mm typical appl ication circuit (s) vson010x3030 t t 1 pin D D s s i i g g p p w w m m fg com vcc u fr pwm tosc gnd v m vcc vcc 2200pf 10kohm 10kohm 1uf ~4.7uf datashee t
2 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux contents general description ................................ ................................ ................................ ................................ ...................... 1 features ................................ ................................ ................................ ................................ ................................ ........ 1 applications ................................ ................................ ................................ ................................ ................................ ... 1 key specifications ................................ ................................ ................................ ................................ ......................... 1 package(s) w(typ) x d(typ) x h(max) ................................ ................................ ................................ ..... 1 typical application circuit(s) ................................ ................................ ................................ ................................ ......... 1 pin configuration(s) ................................ ................................ ................................ ................................ ...................... 3 pin description(s) ................................ ................................ ................................ ................................ ......................... 3 block diagram(s) ................................ ................................ ................................ ................................ .......................... 3 absolute maximum ratings (ta = 25c) ................................ ................................ ................................ ....................... 4 recommended operating conditions (ta= - 25c to +95c) ................................ ................................ ........................ 4 electrical characteristics (unless otherwise specified v cc =5v ta=25c) ................................ ................................ .... 5 typical performance curves ................................ ................................ ................................ ................................ ......... 6 application circuit example (constant values are for reference) ................................ ................................ ................ 10 power dissipation ................................ ................................ ................................ ................................ ....................... 21 operational notes ................................ ................................ ................................ ................................ ....................... 23 marking diagrams ................................ ................................ ................................ ................................ ....................... 26 physical dimension, tape and reel information ................................ ................................ ................................ ........ 27 3 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux pin con f iguration pin descriptio n(s) pin no. pin name function 1 fg fg output pin 2 com coil midpoint pin 3 vcc power supply pin 4 u u phase output pin 5 fr motor rotation direction select pin 6 w w phase output pin 7 v v phase output pin 8 gnd gnd pin 9 tosc start - up oscillation pin 10 pwm pwm signal input pin block diagra m 1 2 (top view) fg com vcc u fr pwm tosc gnd v w figure 1. pin configuration figure 2. block diagram pre - driver tsd uvlo osc vreg control duty pwm 10 v 7 w 6 vcc 3 u 4 fr 5 fg signal output 1 tosc 9 gnd 8 com 2 comp . bemf control logic comp . cs vcs tosc 4 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux absolute ma ximum ratings (ta = 25c) parameter symbol limit unit supply voltage vcc 7 v power dissipation pd 0.58 *1 w operating temperature topr 25 to +95 c storage temperature tstg 55 to +150 c output voltage vomax 7 v output current iomax 700*2 ma fg signal output voltage vfg 7 v fg signal output current ifg 10 ma junction temperature tj 150 c *1 reduce by 4.64mw/c over ta=25c. (on 74.2mm74.2mm1.6mm glass epoxy board) *2 this value is not to exceed pd recommended operating conditions (ta= - 25 c to + 9 5 c ) parameter symbol min typ max unit operating supply voltage range v cc 2.2 5 5.5 v input voltage range(pwm, fr ) v in 0 - vcc v 5 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux electrical characteristics ( unless otherwise specified v cc = 5 v ta=25 c ) para meter symbol min typ max unit conditions ref. data 6 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux t ypical performance curves figure 3 circuit current stb figure 4 circuit current figure 5 pwm input current h figure 6 pwm input current l operating range 95 c 25 c 2 5 c 95 c operating range 25 c 2 5 c 95 c 25 c 2 5 c 95 c 25 c 2 5 c 0 5 10 15 20 25 30 35 40 45 50 0 1 2 3 4 5 6 7 supply voltage: vcc[v] circuit current: icc[ua] 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 supply voltage: vcc[v] circuit current: icc[ma] -0.10 -0.08 -0.06 -0.04 -0.02 0.00 0.02 0.04 0.06 0.08 0.10 0 1 2 3 4 5 6 7 supply voltage: vcc[v] pwm input current h: ipwmh[ua] -18 -16 -14 -12 -10 -8 -6 -4 -2 0 0 1 2 3 4 5 6 7 supply voltage: vcc[v] pwm input current l: ipwml[ua] 7 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux t ypical performance curves 2 figure 7 fr input current h figure 8 fr input current l f igure 9 tosc charge current figure 10 tosc discharge current 25 c 25 c 95 c 25 c 25 c operating range operating range 95 c 95 c 25 c 2 5 c 95 c 25 c 2 5 c -120.0 -110.0 -100.0 -90.0 -80.0 0 1 2 3 4 5 6 7 supply voltage: [v] tosc charge current: [ua] 80 90 100 110 120 0 1 2 3 4 5 6 7 supply voltage: [v] tosc discharge current: [ua] -0.10 -0.08 -0.06 -0.04 -0.02 0.00 0.02 0.04 0.06 0.08 0.10 0 1 2 3 4 5 6 7 supply voltage: vcc[v] fr input current h: ipwmh[ua] -30 -25 -20 -15 -10 -5 0 0 1 2 3 4 5 6 7 supply voltage: vcc[v] fr input current l: ipwml[ua] 8 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux t ypical performance curves 3 figure 1 1 fg output low voltage (vcc=5v) figure 1 2 fg output low voltage (ta=25 c ) figure 1 3 output low voltage (ta=25 c ) figure 1 4 output low voltage (vcc=5v) 7 v 5v 2 .2 v 95 c 25 c 25 c 95 c 25 c 25 c 7 v 5v 2 .2 v 0.0 0.1 0.2 0.3 0 1 2 3 4 5 6 output sink current: ifg[ma] fg low voltage: vfgl[v] 0.0 0.1 0.2 0.3 0 1 2 3 4 5 6 output sink current: ifg[ma] fg output low voltage: vfgl[v] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output sink current: io[a] output low voltage: vol[v] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output sink current: io[a] output low voltage: vol[v] 9 / 27 tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 b d 67173nux t ypical performance curves 4 figure 1 5 output high voltage (vcc=5v) figure 1 6 out high voltage (ta=25 c ) figure 17 lock protection det . ti me figure 18 lock protection rel. time 95 c 25 c 2 5 c 5.5 v 5v 2 .2 v 95 c 25 c 25 c 95 c 25 c 25 c 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output source current: ifg[ma] output high voltage: voh[v] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 output source current: ifg[ma] output high voltage: voh[v] 0.4 0.6 0.8 1.0 1.2 1.4 0 1 2 3 4 5 6 7 supply voltage: vcc[v] lock protection rel. time: [s] 3.0 4.0 5.0 6.0 7.0 0 1 2 3 4 5 6 7 supply voltage: vcc[v] lock protection rel. time: [s] 10 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 a pplication circuit example ( c onstant values are for reference) ? the wiring patterns from the vcc terminal and gnd terminal to the bypass capacitor must be routed as short as possible. because full pmw driving becomes the factor of the noise in BD67173NUX , the value of bypass capacitor set to 4.7 uf ,2.2uf or 1uf . with respect to the wirin j s d w w h u q , w k d v e h h q f r q i l u p h g w k d w i r u 4.7uf, 2.2 uf or 1uf d w w k h e \ s d v v f d s d f l w r u g r h v q ? w f d x v h s u r e o h p v x q g h u r x u r s h u d w l r q h q y l u r q p h q w 7 k l v f d q e h x v h g d v d u h i h u h q f h value to check for validity. ? when it is noisy, capacitance should be insert ed between u - com, v - com , and w - com. ? c onnect a capacitor between tosc terminal and gnd. start - up frequency can be adjusted. when tosc terminal is opened and is connected to gnd, start up o peration becomes unstable. substrate design note a) ic power, mo tor outputs, and motor ground lines are made as fat as possible. b) ic ground (signal ground) line arranged near to ( ) land. c) the bypass capacitor is arrangement near to vcc terminal. d) when substrates of outputs are noisy, add capacitor as needed. e) when back emf is large, add z ener diode as needed. fig ure 19 . pwm controllable 4 wires type (fg) motor application circuit fig ure 20 . tosc function setting tosc = pull - down tosc ok tosc ng tosc = open connect to capacitor ok tosc h 1 uf to 4 . 7 uf pwm h 2200 pf sig 0 pull - up resistance so bypass capacitor , arrangement near to vcc terminal as much as possible . the capacitor set the start - up frequency . start up synchronized time is 200 ms at 2200 pf 10 k noise measures of substrate . m measure against back bemf noise measures of substrate . noise measures of substrate . 11 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 description of function operation 1. state transition 50ms/div fig ure 21 . flow chart 200ms/div vcc on - > normal driving ch1:fg (10v/div) ch2:u (5v/div) ch3: v (5v/div) ch4:w (5v/div) 10 0ms/div ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch 4:w (5v/div) 2s/div normal driving - > lock mode - > re - start normal driving - > lock mode lock - > ton - > lock toff - > re - start ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) motor lock by hand lock lock ton normal driving re - start 5 0ms/div vcc on rotation judgment 50ms stop forward rotation forward rotation logic 9times detect others synchronized start sequence (120 drive) lock mode (output off) normal driving (150 drive) forward rotation logic no detect ( between 1sec) forward rotation logic detect (9times ) less than 100rpm more than 100000rpm output off: 5s each state stand - by mode @ pwm = input l level 12 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 2 . sensorless drive BD67173NUX is a motor driver ic for driving a three - phase brushless dc motor without a hall sensor. detecting a rotor location firstly at startup, an appropriate logic for the rotation direction is obtained using this information and given to each p hase to rotate the motor. then, the rotation of the motor induces electromotive voltage in each phase wiring and the logic based on the induced electromotive voltage is applied to the each phase to continue rotating. 2.1 motor drive output voltage and cu rrent u, v, and w the timing charts of the output signals from the u, v and w output is shown (figure 6.). the detection of the bemf voltage does with output u, v, and w (for rise and fall zero - cross) and detects the position of the motor rotation. fig ure 22 . motor drive output timing chart u output voltage position [ deg ] 0 60 120 180 240 300 360 v output voltage w output voltage 60 120 180 240 300 360 u output current v output current w output current soft switching of pmw operation 13 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 2 .2 bemf detection driving mechanism (synchronized start - up mechanism) BD67173NUX ? s start mechanism is synchronized start - up mechanism. BD67173NUX as bemf detection driving starts by set output logic and monitors bemf voltag e of motor. driving mechanism changes to bemf detection driving after detect bemf signal. when bemf signal isn ? t detected for constant time at start - up, synchronized start - up mechanism outputs output logic forcibly by using standard synchronized signal (sy nc signal) and makes motor forward drive. this assistance of motor start - up as constant cycle is synchronized driving mechanism. synchronized frequency is standard synchronized signal. figure 23 , the timing chart (outline) is shown. 3 motor start - up frequen cy v h w w l q j j h q h u d w l r q of synchronized period is shown. figure 23 . synchronized start - up output timing chart 1. vcc on 2. rotation judgment 3. synchronized start sequence 4. normal drive ch1:fg (10v/div) ch2: u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 10 0ms/div start pwm=100% / tosc=2200pf / fr=open bemf detect start bemf detect start output voltage u fg signal (internal bemf signal) start bemf detect 9 times ? 14 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 * disagree with above timing chart 2.3 synchronized start - up frequency setting (tosc capacitor) the tosc terminal starts a self - oscillation by connecting a capacitor between the tosc terminal and gnd. it becomes a start - up frequency, and synchronized time. synchronized time can be adjusted by changing external capacitor. when the capacitor value is small, synchronized time becomes short. it is necessary to choose the best capacitor value for optimum start - up operation. for example external capacitor is 2200pf , synchronized time is 200ms ( typ .). 2200pf is recommended for setting value at first. relationship between external capacitor and synchronized time is shown in below. when connect tosc terminal to gnd, synchronized time is fixed and synchronized time is same as 2200pf. diagram of relat ionship between tosc terminal and synchronized time synchronized time = 8000 x tosc period charge current discharge current bemf detection 9 times successively after bemf detection 9 times successively synchronized time 8000 ?b tos h pwm duty pwm = fixed 100% pwm = same as external pwm duty electrify angle 120 ?; drive 150 ?; drive table 1. setting of electrify angle and output duty while s tart - up tosc=1000pf tosc=2200pf or gnd tosc=3300pf ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 10 0ms/div i v c x tosc tsoc tosc 2 ? tosc oscillator divider ( x 8000 ) tosc signal sync signal c tosc external capacitor synchronized time 3300pf 300ms 2200pf (recommendation) 200ms 1000pf 90ms 15 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 *setting of appropriate capacitor value appropriate value of synchronized time is differ with characteristic and parameter of moto r. appropriate value decided by start - up confirmation with various capacitor value. at first confirm start - up with 2200pf , next is 2400,2700,3000,3300pf ??? ??? P P P 16 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 2.4 motor drive output u, v, w and fg output signals in figure 25 , the timing charts of the output signals from the u, v an d w phases as well as the fg terminal is shown. assuming that a three - slot tetrode motor is used, two pulse outputs of fg are produced for one motor cycle. the three phases are excited in the order of u, v and w phases. outp ut p attern motor output motor output u motor output v motor output w fig ure 25 timing chart of u, v, w and fg output (fr = hi or no connect) table 2. truth t a ble ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 2 ms/div pwm=100% output voltage u position [ deg ] 0 60 120 180 240 300 360 soft switching of pmw operation 60 120 180 240 300 360 output voltage v output voltage w 17 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 2.5 variable speed operation about rotational speed , it changes by pwm terminal input duty of the output of the lower side a nd upper side. ( upper and lower pwm control drive method fig ure 26 ) output p att ern motor output motor output u motor output v motor output w fig. 26 timing chart of u, v a nd w output (with pwm control) table 3. truth t a ble ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 2 ms/div pwm= 5 0% output voltage u position [ deg ] soft switching of pwm operation pwm operation for external pwm control 0 60 120 180 240 300 360 60 120 180 240 300 360 output voltage v output voltage w 18 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 2.6 fg signal mask operation at start - up fg signal is masked between synch ronized start sequence and until 100ms at normal driving. s tate transition start synchronized start (120 ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch 4:w (5v/div) 10 0 ms/div vcc on synchronized start sequence normal driving 100ms pwm=100% / tosc=2200pf / fg=10kohm pull up table 4. truth t a ble fg signal motor lock by hand vcc on pwm=100% / tosc=2200pf ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 200 ms/div ton=1.0s f g=high 19 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 3.2 normal drive lock detect when you stop motor in BD67173NUX normal driving, the motor settles to the high rotation speed. lock detect judg ment of normal driving is set 2pattern s (table.4). ? R ? Q R R R Q Q 200ms/div 5 0ms/div 50ms/div ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) 2s/div normal driving - > lock mode - > re - start normal driving - > lock mode lock - > ton - > lock toff - > re - start ch1:fg (10v/div) ch2:u (5v/div) ch3:v (5v/div) ch4:w (5v/div) motor lock by hand lock lock ton normal driving re - start table 5. l o ck judgment t a ble 20 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 4. power saving function / speed control by pwm input the power saving function is controlled by an input logic of the pwm ter minal. 4.1 operate mode when the pwm terminal is high pwm terminal is open , pwm=100% operating mode, too. (internal circuit is 360k power saving function table 7. fr select t a ble table 6. uvlo judgment t a ble lock protection function active inactive active pwm output 1 ms on off on standby f mode power saving function normal mode normal mode lock protection function active inactive active pwm output 1 ms on off on standby f mode power saving function normal mode normal mode ?4?ftgxgmgqgv7} f ( 0.2 v ) ?4?ft??f (0.16 ) 0?7vh 1.25 a) f = 21 / 27 BD67173NUX tsz02201 - 0h1h0b101160 - 1 - 2 ? 20 15 r ohm co., ltd. all rights reserved. 08.sep.2015 rev.001 www.rohm.com tsz22111 ? 15 ? 001 power dissipation permissible dissipation (total loss) indicates the power that can be consumed by ic a t ta = 25oc (normal temperature). ic is heated when it consumes power, and the temperature of ic chip becomes higher than ambient temperature. the temperature that can be accepted by ic chip depends on circuit configuration, manufacturing process, etc, and consumable power is limited. permissible dissipation is determined by the temperature allowed in ic chip (maximum junction temperature) and thermal resistance of package (heat dissipation capability). the maximum junction temperature is in general equal t o the maximum value in the storage temperature range. heat generated by consumed power of ic is radiated from the mold resin or lead frame of package. the parameter which indicates this heat dissipation capability (hardness of heat release) is called heat resi stance, represented by the symbol m d > & |