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TB2941HQ 2013 - 10- 16 1 bi - cmos linear integrated circuit silicon monolithic t b2941 hq maximum power 49 w btl 4ch audio power amp ic 1. description the tb29 41hq is a power ic with built - in four - channel btl amplifier developed for car audio applicatio n. th e maximum output power p out is 49 w using a pure complementary p - ch and n - ch dmos output stage . in addition, a standby switch, a mute function , output offset voltage detector, high - side switch and various protection features are included. 2. application s power amp ic developed for car audio applications. 3. features ? high output power, low distortion , and l ow noise property (for details, refer to the table 1 t ypical c haracteristic s ). ? built - in high - side switches. (pin25) (note2) ? built - in detecting output offset volta ge. (pin1,pin25) (note2) ? built - in mut ing function . (pin22) ? built - in auto muting functions (for low vcc and stand - by sequence) ? built - in stand - by switch. (pin4) ? b uilt - in various protection circuits (t hermal shut down, over - voltage, s hort to gnd , s hort to v cc , and o utput to output short ) note 1: typical test conditions : v cc = 13.2 v, f = 1 khz, r l = 4 , ta = 25 c ; unless otherwise specified. rg : signal source resistance note2: pin25 functions are selected by mute terminal (pin 22) voltage. weight: 7.7 g (typ.) ta ble 1 t ypical c haracteristic s (note1) test conditio n typ. unit output power (p out ) v cc = 15.2 v, jeita max 49 w v cc = 13.7 v, jeita max 40 thd = 10% 24 output power (p out ) (r l = 2 ) v cc = 13.7 v, jeita max 73 w thd = 10% 45 total harmonic distortion (thd) p out = 4 w 0.006 % output noise voltage ( v no ) (r g = 0 ) filter : din audio 65 v rms operating supply voltage range (v cc ) r l = 4 ? 6 18 v r l = 2 ? 6 16
TB2941HQ 2013 - 10- 16 2 5 v 10 6 20 v cc 1 v cc2 ripple c2: 10 f + b c3: 0.1 f c5: 3900 f out1 ( + ) 11 c1: 0.22 f 8 pw - gnd1 out1 ( ? ) in1 out2 ( + ) 12 2 pw - gnd2 out2 ( ? ) in2 out3 ( + ) 15 18 pw - gnd3 out3 ( ? ) in3 out4 ( + ) 14 24 pw - gnd4 out4 ( ? ) in4 13 16 c6: 1 f 4 stby 25 22 mute c4: 1 f r1: 47 k ? play mute r l pre - gnd ac - gnd h - sw / offset det c1: 0.22 f c1: 0.22 f c1: 0.22 f r l r l r l ac - gnd ac - gnd ac - gnd ac - gnd mpc df a mpc mpc mpc 9 7 17 19 21 23 5 3 df a df a df a 1 offset det 4. block diagram some of the functional blocks, circuits or constants labels in the blo ck diagram may have been omitted or simplified for clarity. in the following explanation, a "channel" is a circuit which consists of inx, outx (+), outx ( -), and pw - gndx. (x:1 to 4)
TB2941HQ 2013 - 10- 16 3 5. pin c onfiguration and function descriptions 5.1 pin c onfiguration ( top vi ew) h - sw/offset det pw - gnd4 out4( ) mute out4( ) v cc out3( ) pw - gnd3 out3( ) ac- gnd in3 in4 pre gnd in2 in1 ripple out () pw - gnd 1 out1( ) v cc2 out2( ) stby out2( ) pw - gnd2 offset det
TB2941HQ 2013 - 10- 16 4 5.2 pin function descriptions pin symbol i/o (note1) description 1 offset det v od - out output offset voltage detector output 2 pw - gnd2 D ground for out2 3 out 2( - ) out out2( - ) output 4 stby v st - in stand - by voltage input 5 out 2(+) out out2(+) output 6 v cc2 v cc - in s upply voltage 2 7 out 1( - ) out out1( - ) output 8 pw - gnd1 D ground for out1 9 out 1(+) out out1(+) output 10 ripple D r ipple voltage 11 in1 in out1 input 12 in2 in out2 input 13 pre - gnd D signal ground 14 in4 in out 4 input 15 in3 in out 3 input 16 ac - gnd D c ommon reference voltage for all input 17 out 3(+) out out3(+) output 18 pw - gnd3 D ground for out3 19 out 3( - ) out out3( - ) output 20 v cc1 v cc - in s upply voltage 1 21 out 4(+) out out4(+) output 22 m ute v mute in mute voltage input 23 out 4( - ) out out4( - ) output 24 pw - gnd4 D ground for out4 25 h- sw/ o ffset det hsw/v od - out high - side switch / offset detector output
TB2941HQ 2013 - 10- 16 5 5 v 10 6 20 v cc 1 v cc2 ripple c2: 10 f + b c3: 0.1 f c5: 3900 f out1 ( + ) 11 c1: 0.2 2 f 8 pw - gnd1 out1 ( ? ) in1 out2 ( + ) 12 2 pw - gnd2 out2 ( ? ) in2 out3 ( + ) 15 18 pw - gnd3 out3 ( ? ) in3 out4 ( + ) 14 24 pw - gnd4 out4 ( ? ) in4 13 16 c6: 1 f 4 stby 25 22 mute c4: 1 f r1: 47 k ? play mute r l pre - gnd ac - gnd h - sw / offset det c1: 0.22 f c1: 0.22 f c1: 0.22 f r l r l r l ac - gnd ac - gnd ac - gnd ac - gnd mpc df a mpc mpc mpc 9 7 17 19 21 23 5 3 df a df a 1 offset det 6. f unctional d escription component name recommended va lue pin purpose effect (note1) lower than recommended value higher than recommended value c1 0.22 f inx (x:1 to 4) to eliminate dc cut- off frequency becomes higher cut- off frequency becomes lower c2 10 f ripple to reduce ripple turn on/off time sh orter turn on/off time longer c3 0.1 f v cc1, v cc2 to provide sufficient oscillation margin reduces noise and provides sufficient oscillation margin c6 1 f ac - gnd common reference voltage for all input pop noise is suppressed when c1: c 6 = 1:4. (note2) c5 3900 f v cc1, v cc2 ripple filter power supply ripple filtering r1 / c4 47k ? / 1 f mute mute on/off smooth switching pop noise becomes larger switching time becomes longer note 1: when the un recommended value is use d, please examine it enough by syste m evaluation. note 2: since ac - gnd pin is a common reference voltage for all input, this product needs to set the ratio of an input capacitance (c1 ) and the ac - gnd capacitance (c 6) to 1:4 note3: use the low leak current capacitor for c1 and c6 .
TB2941HQ 2013 - 10- 16 6 7. standby function (pin 4) the power supply can be turned on or off via pin 4 (stby) . the threshold voltage of pin 4 is below table . the power supply current is about 0.01 a (typ.) in the standby state . stby power v sb (v) on off 0~ 0.9 off on 2.2~ v cc benefits of the standby s witch (1) v cc can be directly turned on or off by a microco ntroller , eliminating the need for a switching relay. (2) since the control current is minuscule , a low - current - rated switching relay can be used . standby control voltage (v sb ) : pin 4 figure 2 standby switch v cc from microco ntroller battery st b y C using the standby switch C C conventional method C v cc high - current - rated switch battery v cc from microcontroller battery relay v cc low - current - rated switch battery s t b y o n 4 off to b ias power figure 1 internal circuit for st andby
TB2941HQ 2013 - 10- 16 7 8. mut e function (pin 22) the audio mut e function is enabled by setting pin 22 low. r 1 and c 4 determine the time constant of the mut e function . the time constant affects pop noise generated when power or the mut e function is turned on or off; thus , it must be determined on a per -a pplication basis . (refer to figure s 3 and 4 .) the value of the external pull - up resistor is determined, based on pop noise v alue. for example : when the control voltage is ch anged from 5 v to 3.3 v , the pull - up resistor should be: 3.3v/5v 47 k ? = 31k? when th e co ntrol voltage is changed from 5 v to 8 . 5 v , the pull - up resistor should be: 8 . 5 v/5v 47 k ? = 80k? figure 3 mute function figure 4 mute attenuation ? v mute (v) 22 1 k ? r 1 5 v mute on/off control c 4 pin 22 control voltage : v mute (v) att C v mute mute attenuation att (db)
TB2941HQ 2013 - 10- 16 8 9. a ut o muting function s the TB2941HQ has two automatic mute function. a) low vcc mute b) stand - by off mute. 9.1 low vcc mute when t he supply voltage became lower than 5.5v (typ), the TB2941HQ operates the mute circuit automatically. this function prevents the large audible transient noise which is generated by low vcc 9.2 standby - off mute the TB2941HQ operates the mute circuit during the standby - off transition. when the ripple voltage reached vcc/5, the standby - off mute is terminated. the external mute has to be on till the internal mute - o f f. figure 5 standby - off mute standby off ripple voltage vcc/5 ripple terminal voltage standby off transition (mute - on) tmute 500ms vcc=13.2v n ormal operation (mute - off) t
TB2941HQ 2013 - 10- 16 9 10. high - side switch (pin 25) the high -si de switch can be used for many application circuits related to p ower - on. this function is enabled by mute voltage (pin 22) less than 6v. figure 6 high - side switch 25 q1 vcc rlsw
TB2941HQ 2013 - 10- 16 10 11. output dc offset detection thi s function detects the offset voltage between out(+) and out( - ). the detection result is gotten by pin1 or pin25. when the offset voltage appeared by the external parts accident, for example the leak of coupling capacitor, this function can contribute to a part of safety system to prevent the speaker damage. the example flowchart : t he safety system to prevent damaging to speakers by abnormal offset. the result of detection does not judge the abnormal offset or not. this function detects only the offset voltage which is decided by specification. 11.1 offset circuit a) regarding offset detector of pin25. the result of output offset voltage detection of pin25 is gotten by the internal high - side switch which synchronizes with offse t voltage. this function is enabled by mute terminal voltage more than 7v. b) regarding offset detector of pin1 the result of output offset voltage detection of pin1 is gotten by the internal open collector transistor which synchronizes with offset voltage. this function is always available. if this pin does not be used, connect to gnd or open. figuare 8 show s the detected result and audio output waveform. figure 7 abnormal output offset voltage v ref e. vol 25 vos - det(on) + ? power amp ic l eak or short v in(dc) r s2 r s1 vout(dc) rs1 generates the positive offset voltage. rs2 generates the negative offset voltage. the specification defines the offset voltage as "out(+) - out( - )" vout(dc) > vin(dc) v 25 l eak or short 1 v 1 v ref (a) offset detection (b) judgment normal / abnormal (c) to reduce the speaker stress standby - on, mute - on etc.
TB2941HQ 2013 - 10- 16 11 f igure 8 the detected result and audio output waveform detection result +v os - det(on ) - v os - det(on) output waveform out(+) to out( - ) abnormal offset voltage term of abnormal offset voltage 0 t v 1/ v 25 0
TB2941HQ 2013 - 10- 16 12 12. low voltage operation the TB2941HQ's amplifier circuit is made in mpc/dfa technology. this technology prevents the audible pop noise and sound cutting due to low vcc voltage. 12.1 description when the headroom voltage is suppressed by the low vcc, the TB2941HQ switches outputs voltage from vcc/2 to vcc/4 and reduces the audible pop noise and the sound cutting. the TB2941HQ ca n reduce the distortion which is generated by low vcc, because this amplifier circuit keeps the voltage gain of blt outputs. in other words, if one side output of btl has the voltage margin, its output can make up for clipped waveform of other side output .
TB2941HQ 2013 - 10- 16 13 13. p rotection f unctions this product has internal protection circuits such as t hermal shut down, over - voltage, out to v cc , out to gnd , and out to out short circuit protections. (1) t hermal shut down it operates w hen junction temperature exceeds 150 c (typ.). when it operates, it is protected in the following order . 1. an attenuation of an output starts first and the amount of attenuation also increases according to a temperature ris ing, 2. all outputs become in a mute state , when temperature continues rising in sp ite of output attenuation . 3. s hutdown function starts, when a temperature rise continu es though all output s are in a mute state. in any case i f temperature falls, it will return automatically. (2) o ver - voltage it o perates when voltage exceed ing o perating range is supplied to v cc pin. if voltage falls, it will return automatically. when it operates, all output s bias and high - side switch are turned off and all output s are intercepted. t hreshold voltage is 23v(typ.) (3) short to v cc , short to gnd, output to output short it operates when each output pin is in irregular connection and the load line goes over the soa of power transistor (dmos). when it operates, all outputs bias circuits are turned off and all outputs are intercepted. if irregular connection is cancele d, it will return automatically.
TB2941HQ 2013 - 10- 16 14 14. absolute maximum ratings ( ta = 25c unless otherwise specified ) characteristics condition symbol rating unit supply voltage (surge) max0.2s v cc (surge) 50 v supply voltage (dc) v cc (dc) 25 v supply voltage (operati on) v cc (opr) 18 v output current (peak) i o (peak) 9 a power dissipation (note) p d 125 w operating temperature range t opr - 40 to 85 c storage temperature t stg - 55 to 150 c note: package thermal resistance r th(j -t ) = 1 c /w (typ.) (ta = 25c , w ith infinite heat sink) the absolute maximum ratings of a semiconductor device are a set of specified parameter values , which must not be exceeded during operation, even for an instant. if any of these rating would be exceeded during operation, the devic e 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 . ap plications using the device should be designed such that each maximum rating will never be exceeded in any operating conditions. before using, creating, and/or producing designs, refer to and comply with the precautions and conditions set forth in this do cument. 14.1 power dissipation 15. o perating ranges characteristics symbol condition min typ max unit supply voltage v cc r l =4 6 --- 18 v r l =2 6 --- 16 v ambient temperature ta ( c) p d ( max ) C ta power dissipation p d (max) (w) (1) (2) (3) 25 0 150 0 120 75 60 100 40 20 80 100 50 125 (1) infinite heat sink r th (j - t) = 1 c/w (2) heat sink ( r th (hs) = 3.5 c/ w) r th (j - t) + r th (hs) = 4.5 c/w (3) no heat sink r th (j - a) = 39 c/w
TB2941HQ 2013 - 10- 16 15 16. electrical characteristics 16.1 amplifier, common part (v cc = 13.2 v, f = 1 khz, r l = 4 , ta = 25 c unless otherwise specified ) characteristics symbol test condition min typ. max unit quiescent supply curr ent i ccq v in = 0 v 100 180 300 ma output power p out (max) (1) v cc = 15.2 v, max power D 49 D w p out (max) (2) v cc = 13.7 v, max power D 40 D p out (1) thd = 10% 23 24 D output power(r l =2) p out (max) (3) v cc = 13.7 v, max power D 73 D w p out ( 2 ) thd = 10% D 45 D total harmonic distortion thd (1) p out = 4 w D 0.006 0.07 % thd (2) p out = 4 w , rl=2 D 0.015 D voltage gain g v (1) v out = 0.775 vrms 25 26 27 db channel - to - channel voltage gain ? g v v out = 0.775 vrms ?1.0 0 1.0 db output noise voltage v no (1) rg = 0 , din audio D 65 80 v D D D D D ripple rejection ratio r.r. f rip = 100 hz, r g = 620 ( ? 1) v rip = 1 vrms 50 65 D db crosstalk c.t. po = 4w, r g = 620 , D 80 D db output offset voltage v offset D ?90 0 90 mv input resistance r in D D 90 D k ? standby current i st by v sb = 0v D 0.01 1 a mute attenuation att mute mute: on v out = 7.75 vrms mute: off 85 100 D db standby control voltage v sb h power : on 2.2 D v cc v v sb l power : off 0 D 0.9 mute control voltage v m h mute : off 2.2 D v cc v v m l mute : on 0 D 0.9 n ote 1 : f rip : repple frequency v rip : ripple signal voltage ( ac fl u ctuations in the power supply )
TB2941HQ 2013 - 10- 16 16 16.2 pin 25 high - side switches, output dc offset detect or (v cc = 13.2 v, f = 1 khz, r l = 4 , i o - hsw = 400ma , ta = 25 c unless otherwise specified ) characteristics symbol test condition min typ. max unit hsw maximum current i o- hsw ( max ) v o- hsw = 12.6 v 400 D D ma hsw i/o voltage ratio ? v o D D 0.2 0.6 v f unction switching control voltage v m ( hsw ) enable hsw 2.2 D 6.0 v v m ( det ) enable vos det 7.0 D v cc dc offset threshold voltage v os- det(on) v m= = 8v, vo(+) C vo( - ) 2.5 3 3.5 v r lsw high side switch t est circuit 1
TB2941HQ 2013 - 10- 16 17 16.3 pin 1 output dc offset detector (v cc = 13.2 v, f = 1 khz, r l = 4 , r pull - up = 10k , vsb=vref=5v ta = 25 c unless otherwise specified ) characteristics symbol test circuit test condition min typ. max unit dc offset threshold voltage vos1 - det(on) (5) vsb=5v, vo(+) - vo( - ) 2.5 3.0 3.5 v pin 1 saturatio n voltage p1 - sat (5) rpull - up=10k , vref=5.0v active low ? 100 500 mv test circuit (5) vref =5v rpull- up=10k
TB2941HQ 2013 - 10- 16 18 5 v 10 6 20 v cc 1 v cc2 ripple c2: 10 f + b c3: 0.1 f c5: 3900 f out1 ( + ) 11 c1: 0.22 f 8 pw - gnd1 out1 ( ? ) in1 out2 ( + ) 12 2 pw - gnd2 out2 ( ? ) in2 out3 ( + ) 15 18 pw - gnd3 out3 ( ? ) in3 out4 ( + ) 14 24 pw - gnd4 out4 ( ? ) in4 13 16 c6: 1 f 4 stby 25 22 mute c4: 1 f r1: 47 k ? play mute r l : 4 ? pre - gnd ac - gnd h - sw / offset det c1: 0.22 f c1: 0.22 f c1: 0.22 f r l : 4 ? r l : 4 ? r l : 4 ? ac - gnd ac - gnd ac - gnd ac - gnd mpc df a mpc mpc mpc 9 7 17 19 21 23 5 3 df a df a df a 1 offset det 17. test circuit components in the test circuit are only used to determine the device characteristics. it is not guaranteed that the system will work properly with these components.
TB2941HQ 2013 - 10- 16 19 18. test circuit o utput power p out (w) thd C p out t otal harmonic distortion thd (%) o utput power p out (w) thd C p out t ot al harmonic distortion thd (%) f requency f (khz) g v C f v oltage gain g v (db) t otal harmonic distortion thd (%) f requency f (khz) thd C f
TB2941HQ 2013 - 10- 16 20 f requency f (khz) r.r. C f ripple rejection rate r.r. (db) f requency f (khz) att m ute C f mute attenuation att mute (db) f requency f (khz) c.t. C f (out1) cross talk c.t. (db) f requency f (khz) c.t. C f (out2) cross talk c.t. (db) cross talk c.t. (db) f requency f (khz) c.t. C f (out3) cross talk c.t. (db) f requency f (khz) c.t. C f (out4)
TB2941HQ 2013 - 10- 16 21 input signal resistor r g (k ? ) v no C r g output noise voltage v no ( v) quiescent current i ccq (ma) supply voltage v cc (v) i ccq Cv cc o utput power p out (w) p d C p out power dissipa tion p d (w) input voltage v in(rms) (v) p out C v in o utput power p out (w) v o - hsw C i o - hsw hsw o utput voltage v o - hsw (v) hsw output current i o- hsw (a)
TB2941HQ 2013 - 10- 16 22 19. package dimension s weight : 7.7 g (typ.) * from center to parting line.
TB2941HQ 2013 - 10- 16 23 attention in use ? use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of over current and/or ic failure. the i c will fully break down when used under conditions that exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs from the wiring or load, causing a large current to continuously flow and the breakdown can lead smoke or ignition. to minimize the effects of the flow of a large current in case of breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required. ? if your design includes an inductive load suc h as a motor coil, incorporate a protection circuit into the design to prevent device malfunction or breakdown caused by the current resulting from the inrush current at power on or the negative current resulting from the back electromotive force at power off. for details on how to connect a protection circuit such as a current limiting resistor or back electromotive force adsorption diode, refer to individual ic datasheets or the ic databook. ic breakdown may cause injury, smoke or ignition. ? use a stable power supply with ics with built - in protection functions. if the power supply is unstable, the protection function may not operate, causing ic breakdown. ic breakdown may cause injury, smoke or ignition. ? carefully select external components (such as inp uts and negative feedback capacitors) and load components (such as speakers), for example, power amp and regulator. if there is a large amount of leakage current such as input or negative feedback condenser, the ic output dc voltage will increase. if this output voltage is connected to a speaker with low input withstand voltage, overcurrent or ic failure can cause smoke or ignition. (the over current can cause smoke or ignition from the ic itself.) in particular, please pay attention when using a bridge tie d load (btl) connection type ic that inputs output dc voltage to a speaker directly. ? over current protection circuit over current protection circuits (referred to as current limiter circuits) do not necessarily protect ics under all circumstances. if the over current protection circuits operate against the over current, clear the over current status immediately. depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the over current protection circuit to not operate properly or ic breakdown before operation. in addition, depending on the method of use and usage conditions, if over current continues to flow for a long time after operation, the ic may generate heat resulting in breakdown. ? thermal shutdown circuit thermal shutdown circuits do not necessarily protect ics under all circumstances. if the thermal shutdown circuits operate against the over temperature, clear the heat generation status immediately. depending on the method of use and usage conditio ns, such as exceeding absolute maximum ratings can cause the thermal shutdown circuit to not operate properly or ic breakdown before operation. ? heat radiation design when using an ic with large current flow such as power amp, regulator or driver, please design the device so that heat is appropriately radiated, not to exceed the specified junction temperature (tj) at any time and condition. these ics generate heat even during normal use. an inadequate ic heat radiation design can lead to decrease in ic lif e, deterioration of ic characteristics or ic breakdown. in addition, please design the device taking into considerate the effect of ic heat radiation with peripheral components. ? installation to heat sink please install the power ic to the heat sink not t o apply excessive mechanical stress to the ic. excessive mechanical stress can lead to package cracks, resulting in a reduction in reliability or breakdown of internal ic chip. in addition, depending on the ic, the use of silicon rubber may be prohibited. check whether the use of silicon rubber is prohibited for the ic you intend to use, or not. for details of power ic heat radiation design and heat sink installation, refer to individual technical datasheets or ic databooks.
TB2941HQ 2013 - 10- 16 24 restrictions o n product use ? toshiba corporation, and its subsidiaries and affiliates (collectively "toshiba"), reserve the right to make changes to the i nformation in this document, and related hardware, software and systems (collectively "product") without notice. ? this document and any information herein may not be reproduced without prior written permission from toshiba. even with toshiba's written permission, reproduction is permissible only if reproduction is without alteration/omission. ? though toshiba works co ntinually to improve product's quality and reliability, product can malfunction or fail. customers are responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, softwar e and systems which minimize risk and avoid situations in which a malfunction or failure of product could cause loss of human life, bodily injury or damage to property, including data loss or corruption. before customers use the product, create designs including t he product, or incor porate the product into their own applications, customers must also refer to and comply with (a) the latest versions of all relevant toshiba information, including without limitation, this document, the specifications, the data sheets and applicatio n notes for product and the precautions and conditions set forth in the "toshiba semiconductor reliability handbook" and (b) the instruct ions for the application with which the product will be used with or for. customers are solely responsible for all aspects of their own product design or applications, including but not limited to (a) determining the appropriateness of the use of this product in such d esign or applications; (b) evaluating and determining the applicability of any information contained in this docu ment, or in charts, diagrams, programs, algorithms, sample application circuits, or any other referenced documents; and (c) validating all operating parame ters for such designs and applications. toshiba assumes no liability for customers' product design or applications. ? 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