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TB2921HQ 2006-05-25 1 toshiba bi-cmos linear integrat ed circuit silicon monolithic TB2921HQ (preliminary) maximum power 50 w btl 4-ch audio power ic the TB2921HQ is 4-ch btl audio amplifier for car audio applications. this ic can generate higher power: p out max =50 w as it includes the pure complementary p-ch and n-ch dmos output stage. it is designed to yield low dist ortion ratio for 4-ch btl audio power amplifier, built-in standby function, muting function, and various kinds of protectors. additionally, high-side switch is built in. features ? high power output : p out max (1) = 50 w (typ.) (v cc = 15.2 v, f = 1 khz, jeita max, r l = 4 ? ) : p out max (2) = 43 w (typ.) (v cc = 13.7 v, f = 1 khz, jeita max, r l = 4 ? ) p out max (3) = 80 w (typ.) (v cc = 14.4 v, f = 1 khz, jeita max, r l = 2 ? ) : p out (1) = 29 w (typ.) (v cc = 14.4 v, f = 1 khz, thd = 10%, r l = 4 ? ) : p out (2) = 25 w (typ.) (v cc = 13.2 v, f = 1 khz, thd = 10%, r l = 4 ? ) ? low distortion ratio: thd = 0.015% (typ.) (v cc = 13.2 v, f = 1 khz, p out = 5 w, r l = 4 ? ) ? low noise: v no = 50 vrms (typ.) (v cc = 13.2 v, r g = 0 ? , bw = 20 hz~20 khz, r l = 4 ? ) ? built-in standby switch function (pin 4) ? built-in muting function (pin 22) ? built-in high-side switch function (pin 25) ? built-in various protection circuits: thermal shut down, overvoltage, out to gnd, out to v cc , out to out short ? operating supply voltage: v cc (opr) = 8.0~18 v (r l = 4 ? ) note 1: since this device?s pins have a low withstanding voltage, please handle it with care. note 2: install the product correctly. otherwise, it may result in break down, damage and/or degradation to the product or equipment. note 3: these protection functions are intended to avoid some output short circuits or other abnormal conditions temporarily. these protect functions do not warr ant to prevent the ic from being damaged. in case of the product would be operated with exce eded guaranteed operating r anges, these protection features may not operate and some output short ci rcuits may result in the ic being damaged. note 4: the protection circuit may operate not correctly in case of the use of large phase-shift type speaker. therefore, it should be co nfirmed that there is no problem on act ual evaluation or mass-production board. especially, it is necessary to be ware such a behavio r when the large phase-shift type 2ohm load, which is a kind of sub-woofer for example, is connected to this ic, though such kind of speaker use is not recommended. weight: 7.7 g (typ.)
TB2921HQ 2006-05-25 2 block diagram note5: some of the functional blocks, circuits, or const ants in the block diagram may be omitted or simplified for explanatory purpose. in1 vcc2 vcc1 ripple c2 c5 c3 +b tab c1 1 6 10 pre - gnd 13 20 . mute high side sw 4 22 25 stby ac gnd 16 c6 pw- gnd1 out1(+) out1( - ) rl 7 8 9 11 pw -gnd2 out2(+) out2( - ) rl 3 2 5 12 pw -gnd3 out3(+) out3( - ) rl 19 18 17 15 pw- gnd4 out4(+) out4( -) rl 23 24 21 14 c1 c1 c1 in2 in3 in4 c4 r1 5v play mute in1 vcc2 vcc1 ripple c2 c5 c3 +b tab c1 1 6 10 pre - gnd 13 20 . mute h-sw / off-set 4 22 25 stby ac gnd 16 c6 pw- gnd1 out1(+) out1( - ) rl 7 8 9 11 pw- gnd1 out1(+) out1( - ) rl 7 8 9 11 pw -gnd2 out2(+) out2( - ) rl 3 2 5 12 pw -gnd2 out2(+) out2( - ) rl 3 2 5 12 pw -gnd3 out3(+) out3( - ) rl 19 18 17 15 pw- gnd4 out4(+) out4( -) rl 23 24 21 14 c1 c1 c1 in2 in3 in4 c4 r1 5v play mute
TB2921HQ 2006-05-25 3 caution and application method (description is made only on the single channel.) 1. standby sw function (pin 4) by means of controlling pin 4 (standby pin) to high and low, the power supply can be set to on and off. the threshold voltage of pin 4 is set at about 3v be (typ.), and the power supply current is about 2 a (typ.) in the standby state. control voltage of pin 4: v sb standby power v sb (v) on off 0~0.5 off on 2.5~6 v when changing the time constant of pin 4, check the pop noise. advantage of standby sw (1) since v cc can directly be controlled to on or off by the microcomputer, the switching relay can be omitted. (2) since the control current is microscopic, the switching relay of small current capacity is satisfactory for switching. v cc small current capacity switch battery stand-by v cc from microcomputer battery stand-by ? standby switch method ? figure 2 ? conventional method ? v cc large current capacity switch battery v cc from microcomputer battery relay figure 1 with pin 4 set to high, power is turned on on 4 off 10 k ? to bias cutting circuit 2 v be v cc power
TB2921HQ 2006-05-25 4 2. muting function (pin 22) audio muting function is enabled wh en pin 22 is low. when the time co nstant of the muting function is determined by r 1 and c 4 , it should take into account the pop noise. the pop noise, which is generated when the power or muting function is turn ed on/off, will vary according to the time constant. (refer to figure 3 and figure 4.) the pin 22 is designed to operate off 5 v so that the outside pull-up resistor r 1 is determined on the basic of this value: ex) when control voltage is changed in to 3.3 v from 5 v. 3.3 v/5 v 47 k = 31 k additionally, as the v cc is rapidly falling, the ic internal low voltage muting operates to eliminate the large pop noise basically. the low voltage muting circuit pull 200 a current into the ic so that the effect of the internal low voltage muting d oes not become enough if the r 1 is too small value. to obtain enough operation of the internal low voltage muting, a series resistor, r 1 at pin 22 should be 47 k ? or more. 3. high-side switch pin 25 of this device is used in concerned with v cc as a high-side switch whic h operates with the standby pin. thus, both the power amp ic and the connected external unit (the hideaway unit) can be turned on/off by using of the standby switch. figure 4 mute attenuation ? v mute (v) pin 22 control voltage: v mute (v) att ? v mute mute attenuation att (db) figure 3 muting function 22 1 k ? r 1 5 v mute on/off control c 4 0 ? 120 ? 100 ? 80 ? 60 ? 40 ? 20 0 20 0.5 1 1.5 2 2.5 3 v cc = 13.2 v f = 1khz r l = 4 ? v out = 20dbm
TB2921HQ 2006-05-25 5 4. off-set detection function it is possible to use this function by se tting the voltage of pin 22 higher than 8v. in case of appearing output offset voltage by generati ng a large leakage current on the input capacitor etc. 5. pop noise suppression since the ac-gnd pin (pin 16) is used as the nf pin for all amps, the ratio between the input capacitance (c1) and the ac-to-gnd capacitance (c6) should be 1:4. also, if the power is turned off before the c1 and c6 batteries have been completely charged, pop noise will be generated because of the dc input unbalance. to counteract the noise, it is recommended that a longer charging time be used for c2 as well as for c1 and c6. note that the time which audio output takes to start will be longer, sinc e the c2 makes the muting time (the time from when the power is turned on to when audio output starts) is fix. the pop noise which is generated when the muting fu nction is turned on/off w ill vary according to the time constant of c4.the greater the capacitance, the lo wer the pop noise. note that the time from when the mute control signal is applied to c4 to when th e muting function is turn ed on/off will be longer. figure 6 application and detection mechanism v re f elec. vol 25 5 v l.p.f. to cpu + ? v offset voltage (at leak or short) dc voltage ( ? ) amp (at short) (r s2 ) dc voltage ( + ) amp (at leak) (r s1 ) v cc/2 (normal dc voltage) leak or short v bias v ref/2 a b r s2 r s1 ( + ) amp output threshold level (r s1 ) v cc/2 gnd gnd t t gnd voltage o f point (a) voltage o f point (b) threshold level (r s2 ) t r s2 figure 7 wave form
TB2921HQ 2006-05-25 6 6. external component constants effect component name recommended value purpose lower than recommended value higher than recommended value notes c1 0.22 f to eliminate dc cut-off frequency is increased cut-off frequency is reduced pop noise is generated when v cc is on c2 10 f to reduce ripple powering on/off is faster powering on/off takes longer c3 0.1 f to provide sufficient oscillation margin reduces noise and provides su fficient oscillation margin c4 1 f to reduce pop noise high pop noise. duration until muting function is turned on/off is short low pop noise. duration until muting function is turned on/off is long c5 3900 f ripple filter power supply ripple filtering c6 1 f nf for all outputs pop noise is suppressed when c1:c6 = 1:4 pop noise is generated when v cc is on note6: if recommended value is not used.
TB2921HQ 2006-05-25 7 absolute maximum ratings (ta = 25c) characteristics symbol rating unit peak supply voltage (0.2 s) v cc (surge) 50 v dc supply voltage v cc (dc) 25 v operation supply voltage v cc (opr) 18 v output current (peak) rl=4 ? i o (peak) 9 output current (peak) rl=2 ? i o (peak)-2 6.3 a power dissipation p d (note 6) 125 w operation temperature t opr ? 40~85 c storage temperature t stg ? 55~150 c note 7: package thermal resistance j-t = 1c/w (typ.) (ta = 25c, with infinite heat sink) the absolute maximum ratings of a semiconductor device ar e a set of specified parameter values, which must not be exceeded during operation, even for an instant. if any of these rating wo uld be exceeded during operation, the device electrical characteristics may be irreparably altered and the reliability and lifetime of the device can no longer be guaranteed. moreover, these operations with exceeded ratings may cause break down, damage and/or degradation to any other equipment. applications using th e device should be designed such that each maximum rating will never be exceeded in any operating conditions. be fore using, creating and/or producing designs, refer to and comply with the precautions and cond itions set forth in this documents.
TB2921HQ 2006-05-25 8 electrical characteristics (unless otherwise specified, v cc = 13.2 v, f = 1 khz, r l = 4 ? , ta = 25c) characteristics symbol test circuit test condition min typ. max unit quiescent current i ccq ? v in = 0 ? 200 400 ma p out max (1) ? v cc = 15.2 v, max power ? 50 ? p out max (2) ? v cc = 13.7 v, max power ? 43 ? p out max (3) ? v cc = 14.4 v, rl = 2 ? max power ? 80 ? p out (1) ? v cc = 14.4 v, thd = 10% ? 29 ? output power p out (2) ? thd = 10% 23 25 ? total harmonic distortion thd ? p out = 5 w ? 0.015 0.15 % voltage gain g v ? v out = 0.775 vrms 25 26 27 db voltage gain ratio ? g v ? v out = 0.775 vrms ? 1.0 0 1.0 db v no (1) ? rg = 0 ? , din45405 ? 60 ? output noise voltage v no (2) ? rg = 0 ? , bw = 20 hz~20 khz ? 50 70 vrms ripple rejection ratio r.r. ? f rip = 100 hz, r g = 620 ? v rip = 0.775 vrms 50 60 ? db cross talk c.t. ? r g = 620 ? v out = 0.775 vrms ? 70 ? db output offset voltage v offset ? ? ? 100 0 100 mv input resistance r in ? ? ? 90 ? k ? standby current i sb ? standby condition ? 2 10 a v sb h ? power: on 2.5 ? 6.0 standby control voltage v sb l ? power: off 0 ? 0.5 v v m h ? mute: off 2.5 ? 6.0 mute control voltage v m l ? mute: on, r 1 = 47 k ? 0 ? 0.5 v mute attenuation att m ? mute: on v out = 7.75 vrms mute: off 80 90 ? db high-side switch a nd offset detection output current i o ? 400 ? ? ma difference voltage between v cc and output ? v o ? i o = 400 ma, + b = 9.6 v ? 0.25 0.6 v detection threshold voltage voff-set ? rpull-up = 47 k ? , + v = 5.0v based on output dc voltage 2 .5 3.0 3 .5 v
TB2921HQ 2006-05-25 9 test circuit components in the test circuits are only used to obtain and confirm the device characteristics. these components and circuits do not warrant to prevent the application eq uipment from malfunction or failure. in1 vcc2 vcc1 ripple c2:10uf c5:3900uf c3:0.1uf +b tab c1:0.22uf 1 6 10 pre - gnd 13 20 . mute high side sw 4 22 25 stby ac gnd 16 c6:1uf pw- gnd1 out1(+) out1(- ) rl=4oh m 7 8 9 11 pw- gnd2 out2(+) out2( -) rl=4oh m 3 2 5 12 pw- gnd3 out3(+) out3( -) rl=4oh m 19 18 17 15 c3:0.1uf +b tab c1:0.22uf 1 6 10 pre - gnd 13 20 . mute h-sw / offset 4 22 25 stby ac gnd 16 c6:1uf pw- gnd1 out1(+) out1(- ) rl=4oh m 7 8 9 11 pw- gnd1 out1(+) out1(- ) rl=4oh m 7 8 9 11 pw- gnd2 out2(+) out2( -) rl=4oh m 3 2 5 12 pw- gnd2 out2(+) out2( -) rl=4oh m 3 2 5 12 pw- gnd3 out3(+) out3( -) rl=4oh m 19 18 17 15 pw- gnd4 out4(+) out4(- ) rl=4oh m 23 24 21 14 c1:0.22uf c1:0.22uf c1:0.22uf in2 in3 in4 c4:1uf r1:47 k ?? 5v play mute
TB2921HQ 2006-05-25 10 package dimensions weight: 7.7 g (typ.)
TB2921HQ 2006-05-25 11 ? the information contained herein is subject to change without notice. ? the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba for any infringements of patents or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of toshiba or others. ? toshiba is continually working to improve the quality an d reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inhe rent electrical sensitivity and vulnerability to physical stress. it is the responsibility of t he buyer, when utilizing toshiba products , to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within s pecified operating ranges as set forth in the most recent toshi ba products specifications. also, pl ease keep in mind the precautions and conditions set forth in the ?handling guide for semicond uctor devices,? or ?toshiba semiconductor reliability handbook? etc.. ? the toshiba products listed in this document are inte nded for usage in general electronics applications (computer, personal equipment, office equipment, measuri ng equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunc tion or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control in struments, airplane or spaceship instruments, transportation instruments, traffic signa l instruments, combusti on control instruments, medical instruments, all types of safety devices, et c.. unintended usage of toshiba products listed in this document shall be made at th e customer?s own risk. ? the products described in this document are subject to the foreign exchange and foreign trade laws. ? toshiba products should not be embedded to the down stream products which are prohibited to be produced and sold, under any law and regulations. ? this product generates heat durin g normal operation. however, substa ndard performance or malfunction may cause the product and its peripherals to reach abnormally high temperatures. the product is often the final stage (the external ou tput stage) of a circuit. substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. 030619ebf restrictions on product use about solderability, following conditions were confirmed ? solderability (1) use of sn-37pb solder bath solder bath temperature = 230c dipping time = 5 seconds the number of times = once use of r-type flux (2) use of sn-3.0ag-0 .5cu solder bath solder bath temperature = 245c dipping time = 5 seconds the number of times = once use of r-type flux

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