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TB2959HQ 2011-11-08 1 bi-cmos linear integrated circuit silicon monolithic TB2959HQ maximum power 47w btl ? 4-ch audio power ic 1. description the TB2959HQ is a four-channel btl power amplifier for car audio applications. this ic has a pure complementary p-ch and n-ch dmos output stage, offering maximum output power (p out max) of 47w. it includes a standby switch , mute function and various protection features. 2. applications power ic developed for car audio applications. 3. features ? high output power, low distortion, and low nois e property (for details, refer to the table 1) ? build-in aux-in (pin25) ? built-in various mute functions (low voltage, standby on/off) ? built-in standby switch (pin4) ? built-in mute switch (pin22) ? built-in various protection circuits (the rmal shut down, over-voltage, short to gnd, short to vcc, and output to output short) note1: typical test conditions: v cc = 13.2 v, f = 1 khz, r l = 4 ? , g v = 26 db, ta = 25c; unless otherwise specified. note2: rg: signal source resistance weight: 7.7 g (typ.) table1 typical characteristics (note1,note2) condition typ. unit output power (p out ) v cc = 15.2 v, jeita max 47 v cc = 14.4 v, jeita max 42 v cc = 14.4 v, thd = 10% 27 thd = 10% 23 w total harmonic distortion (thd) p out = 5 w 0.005 % output noise voltage (v no ) (rg = 0 ? ), bw = 20 hz to 20 khz 50 v operating supply voltage range (v cc ) r l = 4 ? 6 to 18 v
TB2959HQ 2011-11-08 2 4. block diagram note3: some of the functional blocks, circuits or constants may be omitted from the block diagram or simplified for explanatory purposes.in the following expl anation, a "channel" is a circuit which consists of inx, outx (+), outx (-), and pw-gndx. (x:1 to 4)
TB2959HQ 2011-11-08 3 5. pin configuration and function descriptions 5.1 pin configuration (top view) aux-in pw-gnd4 out4( ) mute out4( ) vcc out3( ) pw-gnd3 out3( ) ac-gnd in3 in4 pre gnd in2 in1 ripple out () pw-gnd1 out1( ) vcc2 out2( ) stby out2( ) pw-gnd2 tab
TB2959HQ 2011-11-08 4 5.2 pin function descriptions pin symbol i/o description tab D tab (always connect with gnd) pw-gnd2 D ground for rear left output out2(-) out rear left output- stby v st -in standby voltage input out2(+) out rear left output+ v cc2 v cc -in supply voltage 2 out1(-) out front left output- pw-gnd1 D ground for front left output out1(+) out front left output+ 10 ripple D ripple voltage 11 in1 in front left input 12 in2 in rear left input 13 pre-gnd D signal ground 14 in4 in rear right input 15 in3 in front right input 16 ac-gnd D common reference voltage for all input 17 out3(+) out front right output+ 18 pw-gnd3 D ground for front right output 19 out3(-) out front right output- 20 v cc1 v cc -in supply voltage 1 21 out4(+) out rear right output+ 22 mute v mute in mute voltage input 23 out4(-) out rear right output- 24 pw-gnd4 D ground for rear right output 25 aux-in in_beep beep sound or voice synthesizer signal input
TB2959HQ 2011-11-08 5 6. detailed description note4: when the unrecommended value is used, pl ease examine it enough by system evaluation. note5: since ?ac-gnd? pin is a common reference voltage fo r all input, this product n eeds to set the ratio of an input apacitance (c1) and the ac-gnd capacitance (c6) to 1:4. effect (note4) component name recomm ended value pin purpose lower than recommended value higher than recommended value c1 0.22 f inx(x:1 to 4) to eliminate dc cut-off freq uency becomes higher cut-off frequency becomes lower c2 10 f ripple to reduce ripple turn on/off time and turn-on diag. cycle shorter turn on/off time and turn-on diag. cycle longer c3 0.1 f v cc1, v cc2 to provide sufficient oscillation margin reduces noise and provides su fficient oscillation margin c4 1uf mute to reduce pop noise high pop noise. duration until mute function is turned on/off is short. low pop noise. duration until mute function is turned on/off is long. c5 3900 f v cc1, v cc2 ripple filter power supply ripple filtering c6 1 f ac-gnd common reference voltage for all input pop noise is suppressed when c1: c6 = 1:4. (note5) c7 0.22 f aux-in to eliminate dc cut-off frequency is increased in aux cut-off frequency is reduced in aux. r1 47k mute to reduce pop noise high pop noise. duration until mute function is turned on/off is short. low pop noise. duration until mute function is turned on/off is long.
TB2959HQ 2011-11-08 6 7. standby switch the power supply can be turned on or off via pin 4 (stby). the threshold voltage of pin 4 is set at about 3 v be (typ.). the power supply current is about 0.01 ? a (typ.) in the standby state. stand-by power v sb (v) on off 0 to 0.9 off on 2.2 to v cc check the pop levels when the time constant of pin 4 is changed. benefits of the standby switch (1) v cc can be directly turned on or off by a microcont roller, eliminating the need for a switching relay. (2) since the control current is minuscule, a low-current-rated switching relay can be used. table1 standby control voltage (v sb ) figure 2 standby switch v cc low-current-rated switch battery standby v cc from microcontroller battery standby ? using the standby switch ? ? conventional method ? v cc high-current-rated switch battery v cc from microcontroller battery relay figure1 setting pin 4 high turns on power on 4 off 10 k ? to bias powe r 20 k ? 3 k ? 60 k ?
TB2959HQ 2011-11-08 7 8. mute switch the audio mute switch is enabled by setting pin 22 low. r 1 and c 4 determine the time constant of the mute. the time constant affects pop noise generated when power or the mute is turned on or off; thus, it must be determined on a per-application basis. the value of the external pull-up resistor is determined, based on pop noise value. for example, when the control voltage is changed fr om 5 v to 3.3 v, the pull-up resistor should be: 3.3 v/5 v ? 47 k ? ? 31 k ? 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 e (v) att ? v mute mute attenuation att (db) 0 ? 120 ? 100 ? 80 ? 60 ? 40 ? 20 0 20 0.5 1 1.5 2 2.5 3
TB2959HQ 2011-11-08 8 9. mute mode the mute mode in this product is a mu te at standby on/off, an internal mu te for low voltage. if the mute is turned off before charging c1 and c4 is finished, pop noise occurs becaus e of input offset. set ?mute-off? with sufficient margin in cons idering a charge time. 9.1 low voltage mute low voltage mute is operated inside the ic the ripple pin voltage becomes about under the about 5.6v. 9.2 standby off mute a mute operation starts automatically inside the ic after standby-low until the ripple pin voltage becomes about 1/2 vcc-0.7v. standby off standby ?hi? ripple pin voltage 1/2vcc ? 1/2vcc-0.7v ? ripple pin voltage standby off operation period of standby mute mute off t figure5 standby off mute
TB2959HQ 2011-11-08 9 10. aux-input the pin 25 is for input terminal of aux amplifier. the total gain is 0db by using of aux amplifier. therefore, the ? -com can directly drive the aux amplifier. beep sound or voice synthesizer signal can be input to pin 25 directly. when aux function is not used, this pin must be connected to pre-gnd (pin 13) via a capacitor. figure6 aux-input 20db in out ( ?) out ( ?) 25 aux-in -20db aux amp 20db microcomputer
TB2959HQ 2011-11-08 10 11. protection functions this product has internal protection circuits such as thermal shut down, over-voltage, out to v cc , out to gnd, and out to out short circuit protections. (1) thermal shut down it operates when junction temperature exceeds 150c (typ.). when it operates, it is protected in the following order. 1. an attenuation of an output starts first an d the amount of attenuation also increases according to a temperature rising, 2. all outputs become in a mu te state, when temperature continues rising in spite of output attenuation. 3. shutdown function starts, when a temperatur e rise continues though all outputs are in a mute state. in any case if temperature falls , it will return automatically. (2) over-voltage it operates when voltage exceedin g operating range is supplied to v cc pin. if voltage falls, it will return automatically. when it operates, output bi as is turned off and an output is intercepted. (3) short to v cc , short to gnd, output to output short it operates when each pin is in i rregular connection. if ir regular connection is canceled, it will return automatically. short circuit protection can operate for each channel. when it operates, output bias of corresponding output is turned off and an output is intercepted. example) if channel 1 output shorts, channel 1 is protected but other channels 2 to 4 are available. (4) prevention of speaker damage (in case of a layer short-circuit of the speaker) when the dc resistance between the out ? and out ? pins falls below 1 ? , the output current exceeds 4 a. at this time, the protection circuit is acti vated to limit the current draw into the speaker. this feature prevents the speaker from being damaged, as follows: < speaker damaging scenario > a dc current of over 4 v is applied to the spea ker due to an external circuit failure (note 6). (abnormal dc output offset) ?? the speaker impedance becomes 1 ? or less due to a layer short. ? a current of over 4 a flows into the speaker, damaging the speaker.
TB2959HQ 2011-11-08 11 note 6: an abnormal dc offset voltage is incurred when the input bias to the power ic is lost due to a leakage current from a coupling capacitor at the input or a short-circuit between the in and adjacent lines. figure 7 prevention of speaker damage current into the speaker speaker impedance less than 4 a about 1 ? 4 ? the short-circuit prot ection is activated
TB2959HQ 2011-11-08 12 12. 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 (operation) v cc (opr) 18 v output current (peak) i o (peak) 9 a power dissipation (note7) p d 125 w operating temperature range t opr -40 to 85 c storage temperature t stg -55 to 150 c note7: package thermal resistance r th(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 operatio n, even for an instant. if any of these rating would be exceed ed during operation, the device electrical characteristics may be irreparably altered and the reliability and lifetime of the device can no longer be guaranteed. mor eover, these operations with exceeded ratings may cause break down , damage, and/or degradation to any other equipment. applications using the device should be designed such that each maximum ra ting will never be exceeded in any operating conditions. before using, creating, and/or producing designs, refer to and comply with the precauti ons and conditions set forth in this document. 12.1 power dissipation 13. operating ranges characteristics symbol condition min typ. max unit supply voltage v cc r l =4 ? 6 D 18 v ambient temperature ta (c) p d (max) ? 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
TB2959HQ 2011-11-08 13 14. electrical characteristics (v cc = 13.2 v, f = 1 khz, r l = 4 ? , g v =26db, ta = 25c unless otherwise specified) characteristics symbol te s t circuit test condition min typ. max unit quiescent supply current i ccq ? v in ? 0 ? 160 300 ma p out max (1) ? v cc ? 15.2 v, max power ? 47 ? p out max (2) ? v cc ? 14.4 v, max power ? 42 ? p out (1) ? v cc ? 14.4 v, thd ? 10% ? 27 ? output power p out (2) ? thd ? 10% 21 23 ? w total harmonic distortion thd ? p out ? 5 w ? 0.005 0.07 % voltage gain g v ? 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 v no (1) ? r g ? 0 ? , din45405 ? 50 ? output noise voltage v no (2) ? r g ? 0 ? , bw ? 20 hz to 20 khz ? 50 70 ? vrms ripple rejection ratio r.r. ? f rip ? 100 hz, r g ? 620 ?? (note9) v rip ? 0.775 vrms 50 70 ? db crosstalk c.t. ? r g ? 620 ? p out ? 4 w ? 80 ? db output offset voltage v offset ? ? ? 90 0 90 mv input resistance r in ? ? ? 90 ? k ?? standby current i sb ? standby condition, v4 ? 0, v22 ? 0 ? 0.01 1 ? a v sb h ? power: on 2.2 ? v cc standby control voltage v sb l ? power: off 0 ? 0.9 v v m h ? mute: off 2.2 ? vcc mute control voltage v m l ? mute: on, r 1 ? 47 k ? 0 ? 0.9 v mute attenuation att m ? mute: on, din_audio v out ? 7.75 vrms ? mute: off 85 100 ? db upper cut-off frequency f th ? g v ? 26db, 3db down ? 400 ? khz note9: f rip ripple frequency v rip ripple signal voltage (ac fluctuations in the power supply)
TB2959HQ 2011-11-08 14 15. test circuit components in the test circuits are only used to obtain and confirm the device characteristics.
TB2959HQ 2011-11-08 15 16. characteristic chart 16.1 total harmonic distortion vs. output power figure 11-1 total harmonic distortion of each frequency (r l = 4 ? ) output power p out (w) thd ? p out (ch1) thd ? p out (ch2) output power p out (w) total harmonic distortion thd (%) total harmonic distortion thd (%) thd ? p out (ch3) thd ? p out (ch4) output power p out (w) output power p out (w) total harmonic distortion thd (%) total harmonic distortion thd (%) f = 1 khz 100 hz 10 khz 20 khz v cc = 13.2 v g v = 26db r l = 4 ? filter 100 hz : to 30 khz 1 khz : 400 hz to 30 khz 10 khz : 400 hz to 20 khz : 400 hz to 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.3 0.5 3 10 50 100 1 5 30 0.1 f = 1 khz 100 hz 10 khz 20 khz v cc = 13.2 v g v = 26db r l = 4 ? filter 100 hz : to 30 khz 1 khz : 400 hz to 30 khz 10 khz : 400 hz to 20 khz : 400 hz to 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30 f = 1 khz 100 hz 10 khz 20 khz v cc = 13.2 v g v = 26db r l = 4 ? filter 100 hz : to 30 khz 1 khz : 400 hz to30 khz 10 khz : 400 hz to 20 khz : 400 hz to 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30 f = 1 khz 100 hz 10 khz 20 khz v cc = 13.2 v g v = 26db r l = 4 ? filter 100 hz : to 30 khz 1 khz : 400 hz to 30 khz 10 khz : 400 hz to 20 khz : 400 hz to 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30
TB2959HQ 2011-11-08 16 figure 11-2 total harmonic distortion by power-supply voltage (r l = 4 ? ) 16.0 v 13.2 v v cc = 6.0 v g v = 26db r l = 4 ? f = 1 khz filter 400 hz to 30 khz 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30 thd ? p out (ch1) thd ? p out (ch2) output power p out (w) output power p out (w) total harmonic distortion thd (%) total harmonic distortion thd (%) thd ? p out (ch3) thd ? p out (ch4) output power p out (w) output power p out (w) total harmonic distortion thd (%) total harmonic distortion thd (%) 16.0 v 13.2 v v cc = 6.0 v g v = 26db r l = 4 ? f = 1 khz filter 400 hz to 30 khz 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30 16.0 v 13.2 v v cc = 6.0 v g v = 26db r l = 4 ? f = 1 khz filter 400 hz to 30 khz 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30 16.0 v 13.2 v v cc = 6.0 v g v = 26db r l = 4 ? f = 1 khz filter 400 hz to 30 khz 0.3 100 0.001 0.003 0.005 0.01 0.03 0.05 0.1 0.3 0.5 1 3 5 10 30 50 0.1 0.5 3 10 50 100 1 5 30
TB2959HQ 2011-11-08 17 16.2 various frequency characteristics figure 11-3 frequency characteristics of total harmonic distortion figure 11-4 frequency characteristics of voltage gain and mute attenuation thd ? f frequency f (khz) total harmonic distortion thd (%) v cc = 13.2 v r l = 4 ? p out = 5 w filter nothing 0.1 0.01 100 0.001 110 0.003 0.01 0.03 0.1 0.3 1 3 8 v 16 v 13.2 v v cc = 13.2 v r l = 4 ? v out = 0.775 vrms (0dbm) 0.1 0.01 100 20 1 10 22 24 26 28 1ch to 4ch v cc = 13.2 v r l = 4 ? v out = 7.75 vrms (20dbm) 0.1 0.01 100 ? 120 1 10 ? 100 ? 80 ? 60 ? 40 ? 20 0 1ch~4ch g v ? f att mute ? f frequency f (khz) frequency f (khz) voltage gain g v (db) mute attenuation att mute (db)
TB2959HQ 2011-11-08 18 figure 11-5 frequency characteristics of ripple rejection rate figure 11-6 frequency characteristics of cross talk 0.1 0.01 100 ? 80 1 10 ? 60 ? 40 ? 20 0 v cc = 13.2 v r l = 4 ? f = 1 khz v out = 0.775 vrms (0dbm) r g = 620 ? ? 100 3ch 4ch 1ch c.t. ? f (ch1) c.t. ? f (ch2) frequency f (khz) frequency f (khz) cross talk c.t. (db) cross talk c.t. (db) c.t. ? f (ch3) c.t. ? f (ch4) frequency f (khz) frequency f (khz) cross talk c.t. (db) cross talk c.t. (db) 0.1 0.01 100 ? 80 1 10 ? 60 ? 40 ? 20 0 v cc = 13.2 v r l = 4 ? f = 1 khz v out = 0.775 vrms (0dbm) r g = 620 ? ? 100 2ch 3ch 4ch 0.1 0.01 100 ? 80 1 10 ? 60 ? 40 ? 20 0 v cc = 13.2 v r l = 4 ? f = 1 khz v out = 0.775 vrms (0dbm) r g = 620 ? ? 100 2ch 4ch 1ch 0.1 0.01 100 ? 80 1 10 ? 60 ? 40 ? 20 0 v cc = 13.2 v r l = 4 ? f = 1 khz v out = 0.775 vrms (0dbm) r g = 620 ? ? 100 1ch 3ch 2ch v cc = 13.2 v r l = 4 ? r g = 620 ? vrip = 0.775 vrms (0dbm) g v = 26db 0.1 0.01 100 ? 80 110 ? 60 ? 40 ? 20 0 3ch 2ch 4ch 1ch r.r. ? f (g v = 26db) frequency f (khz) ripple rejection rate r.r. (db)
TB2959HQ 2011-11-08 19 16.3 output power characteristics to input voltage 16.4 power dissipation vs. output power p out (ch1) ? v in p out (ch2) ? v in input voltage v in (rms) (v) input voltage v in (rms) (v) output power p out (w) output power p out (w) p out (ch3) ? v in p out (ch4) ? v in input voltage v in (rms) (v) input voltage v in (rms) (v) output power p out (w) output power p out (w) 50 40 30 20 10 0 0 1 2 3 4 5 v cc = 13.2 v r l = 4 ? filter nothing 100 hz 10 khz f = 20 khz 1 khz 50 40 30 20 10 0 0 1 2 3 4 5 v cc = 13.2 v r l = 4 ? filter nothing 100 hz 10 khz f = 20 khz 1 khz 50 40 30 20 10 0 0 1 2 3 4 5 v cc = 13.2 v r l = 4 ? filter nothing 100 hz 10 khz f = 20 khz 1 khz 50 40 30 20 10 0 0 1 2 3 4 5 v cc = 13.2 v r l = 4 ? filter nothing 100 hz 10 khz f = 20 khz 1 khz 0 0 5 10 15 25 20 20 40 60 80 f = 1 khz r l = 4 ? 4ch drive 6.0 v 13.2 v 18 v p d ? p out (r l = 4 ? ) output power p out (w) power dissipation p d (w)
TB2959HQ 2011-11-08 20 16.5 other characteristic v no ? r g i ccq ? v cc signal source resistance r g ( ? ) supply voltage v cc (v) output noise voltage v no ( ? v) quiescent current i ccq (ma) v cc = 13.2 v r l = 4 ? f = 1 khz filter to 20 khz 100 10 100 k 0 1 k 10 k 50 100 150 1ch~4ch 150 0 0 5 10 15 20 25 50 100 200 250 v in = 0 v r l = ?
TB2959HQ 2011-11-08 21 17. package dimensions weight: 7.7g (typ.) about solderability, following conditions were confirmed. (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 = 245 c ? dipping time = 5 seconds ? the number of time = once ? use of r-type flux
TB2959HQ 2011-11-08 22 18. 4ch power ic evaluation board this drawing is a component side, and a schematic diagram of evaluation board ?rp-2024 for 4ch power ic using hzip25-p-1.00f (spp25), a solder side. note: this board can be shared with some products. please confirm external parts of the evaluated product beforehand when you unite the evaluation board. ? component side ? solder side figure 18-1 pattern of evaluation board (component side) figure 18-2 pattern of evaluation board (solder side)
TB2959HQ 2011-11-08 23 19. 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 ic will fully break down when used under conditions that exceed its absolute maximum ratings, when the wiring is routed im properly 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 such as a motor coil, incorporate a protection circuit into the design to prevent device malfunction or breakdown ca used 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 dat asheets or the ic databook. ic breakdown may cause injury, smoke or ignition. ? use a stable power supply with ics with built-in prot ection functions. if the power supply is unstable, the protection function may not operate, causing ic brea kdown. ic breakdown may cause injury, smoke or ignition. ? carefully select external components (such as inputs 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 tied load (btl) connection type ic that inputs output dc voltage to a speaker directly. ? over current protection circuit over current protection circuits (ref erred to as current limiter circuits) do not necessarily protect ics under all circumstances. if the over current protection circui ts operate against the over current, clear the over current status immediately. depending on the me thod 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 opera tion, the ic may generate heat resulting in breakdown. ? thermal shutdown circuit thermal shutdown circuits do not necessarily prot ect ics under all circumstances. if the thermal shutdown circuits operate against the over temperat ure, clear the heat generation status immediately. depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the thermal shutdown circuit to not oper ate 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 ex ceed the specified junction temperature (tj) at any time and condition. these ics ge nerate heat even during normal use. an inadequate ic heat radiation design can lead to decrease in ic life, 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 to ap ply 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 silic on 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 individu al technical datasheets or ic databooks.
TB2959HQ 2011-11-08 24 restrictions on product use ? toshiba corporation, and its subsidiaries and affiliates (collect ively ?toshiba?), reserve the right to make changes to the in formation in this document, and related hardware, software a nd systems (collectively ?product?) without notice. ? this document and any information herein may not be reproduc ed 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 continually to improve product?s quality a nd reliability, product can malfunction or fail. customers are responsible for complying with safety standards and for prov iding adequate designs and safeguards for their hardware, software and systems which minimize risk and avoid sit uations in which a malfunction or failure of product could cause loss of human life, b odily injury or damage to property, including data loss or corruption. before customers use the product, create designs including the product, or incorporate the product into their own applications, customers mu st also refer to and comply with (a) the latest versions of all relevant toshiba information, including without limitation, this document, the specificati ons, the data sheets and application notes for product and the precautions and conditions set forth in the ?toshiba semiconduc tor reliability handbook? and (b) the instructio ns 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 lim ited to (a) determining the appropriateness of the use of this product in such des ign or applications; (b) evaluating and dete rmining the applicability of any information contained in this document, or in charts, dia grams, programs, algorithms, sample application circuits, or any other referenced document s; and (c) validating all operating paramete rs for such designs and applications. toshiba assumes no liability for customers? product design or applications. ? product is intended for use in general el ectronics applications (e.g., computers, personal equipment, office equipment, measur ing equipment, industrial robots and home electroni cs appliances) or for specif ic applications as expre ssly stated in this document . product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality a nd/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or se rious public impact (?unintended use?). unintended use includes, without limit ation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equi pment used for automobiles, trains, ships and other transportation, traffic signalin g equipment, equipment used to control combustions or explosions, safety dev ices, elevators and escalato rs, devices related to el ectric power, and equipment used in finance-related fi elds. do not use product for unintended us e unless specifically permitted in thi s document. ? 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