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ta7280,81p 2002-10-30 1 toshiba bipolar linear integrated circuit silicon monolithic TA7280P,ta7281p 5.8w dual audio power amplifier. 22w btl audio power amplifier. the TA7280P, ta7281p are dual audio power amplifier for consumer applications. it is designed for high power, low distortion and low noise. it also contains various kind of protectors. it is suitable for car ? audio power amplifier with high performance. the kinds of pin configuration are available: normal (TA7280P) and reverse (ta7281p) for easier layout design of pc ? board when used in btl ? stereo application. features high power : p out (1) = 22w (typ.) (v cc = 14.4v, f = 1khz, thd = 10%, r l = 4 ? , btl) p out (2) = 19w (typ.) (v cc = 13.2v, f = 1khz, thd = 10%, r l = 4 ? , btl) p out (3) = 15w (typ.) (v cc = 13.2v, f = 1khz, thd = 1%, r l = 4 ? , btl) p out (4) = 5.8w (typ.) / ch (v cc = 13.2v, f = 1khz, thd = 10%, r l = 4 ? , dual) low distortion : thd (1) = 0.03% (typ.) (v cc = 13.2v, f = 1khz, p out = 4w, r l = 4 ? , g v = 40db, btl) thd (2) = 0.06% (typ.) (v cc = 13.2v, f = 1khz, p out = 1w, r l = 4 ? , g v = 52db, dual) low noise : v no (1) = 0.14mv rms (typ.) (v cc = 13.2v, r l = 4 ? , g v = 40db, r g = 0, din noise: din45405, btl) v no (2) = 0.7mv rms (typ.) (v cc = 13.2v, r l = 4 ? , g v = 52db, r g = 10k ? , bw = 20hz~20khz, dual) protector circuit : thermal shout down, over voltage protection, out ? v cc short, out ? gnd short and out ? out short protection. operating supply voltage range : v cc (opr) = 9~18v weight: 4.04g (typ.)
ta7280,81p 2002-10-30 2 block diagram dual application information (this explanatory terminal number is for TA7280P) 1. voltage gain adjustment (1) dual amplifier the voltage gain g v is determined by r 1 , r 2 and r f in (fig. 1). (db) 1 r f r 2 r 1 r f r og 20 v g in case of r f = 0 the voltage gain is set as follows: g v = 52db (typ.) (2) btl amplifier the recommended btl connection amplifier shown in (fig. 2) . amp. 1 is noninverting amplifier and amp. 2 is invert one. the output voltage is divided by resistors r 3 and r 4 . the divided voltage is applied to inverting input of amp. 2. r 3 and r 4 are determined in the following equation. (db) 1 r f r 2 r 1 r f r og 20 3 r 4 r 3 r g v in dual mode
ta7280,81p 2002-10-30 3 the voltage gain in this circuit is 6db higher than that in dual mode. (db) 1 r f r 2 r 1 r f r og 20 v g in case of r f = 0 g v = 52+6 = 58 (db) in case of r f = 430 ? g v = 34+6 = 40 (db) each voltage gain can be set as shown above. 2. muting audio muting can be accomplished by connecting pin(6) (ripple filter) to gnd as shown in (fig. 3). then, the bias circuits are cut off. however, caution must be exercised to the following items. (1) the recovery time from the muting operation is determined by the capacities of the ripple filter capacitor between pin(6) and gnd, and of the capacitor for nf. (2) as this muting system is operated by the short circuit of ripple filter: c 5 , the ripple rejection ratio becomes worse in the muting condition. at mute on, some pop noise of breaking the bias are produced. the output waveform at muting on / off during btl, are shown in (fig.4). (provided v cc = 13.2v, r l = 4 ? , non signal.) 50db or more can be obtained for muting amount.
ta7280,81p 2002-10-30 4 3. measures against oscillation. c 7 , c 8 , c 9 , c 12 : the capacitor of polyester film having small variation of the temperature characteristics is recommended as the capacitor for oscillation prevention. c 12 : reduces the gain in the high range frequency (150khz or over) and increases the oscillation allowance. r 5 : increases the oscillation allowance at output cripping of the low range frequency (100hz or less). since the oscillation allowance varies according to the following item, carry out the temperature test to confirm the oscillation allowance. (1) gain to be used (g v setting). (2) capacity of capacitor (3) kinds of capacitor (4) layout of printed board it is recommended to use the capacitor having the capacity exceeding the oscilltation stopping value. at using with the voltage gain g v lowered or with the high range frequency and the oscillation becomes liable to be produced. therefore, application with g v = 40db or over is advisable. especially for using with the gain lowered in dual operation, insert 1000pf between nf (pin(2) and pin(4)) and gnd. this capacitor reduces the gain of the high range frequency and is effective for oscillation prevention. 4. output waveform at power supply on / off (reference) btl and dual amplifier dc output waveforms in the condition of v cc = 13.2v, r l = 4 ? at non signal (input short) are shown in (fig. 5) and (fig. 6). dual
ta7280,81p 2002-10-30 5 the popping time at power supply on / off varies according to the rise and fall times. the condition in which the power supply is rapidly and repeatedly mode on / off, that is, the condition in which the charge is made on the external capacitor of ic is different from the conditions shown in (fig. 5) and (fig. 6) . maximum ratings (ta = 25c) characteristic symbol rating unit peak supply voltage (0.2 s) v cc (surge) 45 v dc supply voltage v cc (dc) 25 v operating supply voltage v cc (opr) 18 v output current (peak) i o (peak) 4.5 a power dissipation p d 25 w operating temperature t opr 30~85 c storage temperature t stg 55~150 c electrical characteristics (unless otherwise specified, v cc = 13.2v, r l = 4 ? , r g = 600 ? , f = 1khz, ta = 25c) characteristic symbol test cir cuit test condition min. typ. max. unit quiescent current i ccq 2 v in = 0 D 80 145 ma p out (1) 1 thd = 10%, v cc = 14.4v D 22 D p out (2) 1 thd = 10% 16 19 D output power p out (3) 1 thd = 1% 12 15 D w total harmonic distortion thd (1) 1 p out = 4w, g v = 40db D 0.03 0.25 % output offset voltage v off 1 v in = 0 D 0 0.35 v voltage gain g v (1) 1 v out = 0.775v rms (0dbm) D 40 D db output noise voltage v no (1) 1 r g = 0 din45405 noise filter D 0.14 D mv rms btl connection mode ripple rejection ratio r. r. (1) 1 f ripple = 100hz v ripple = 0.775v rms (0dbm) D 52 40 db output power p out (4) 2 thd = 10% 5 5.8 D w total harmonic distortion thd (2) 2 p out = 1w D 0.06 0.30 % voltage gain g v (2) 2 v out = 0.775v rms (0dbm) 50 52 54 db voltage gain ratio ? g v 2 v out = 0.775v rms (0dbm) 1 0 1 db output noise voltage v no (2) 2 r g = 10k ? bw = 20hz~20khz D 0.7 1.5 mv rms ripple rejection ratio r. r. (2) 2 f ripple = 100hz v ripple = 0.775v rms (0dbm) D 52 40 db cross talk c. t. 2 v out = 0.775v rms (0dbm) D 57 D db dual mode input resistance r in 2 f = 1khz D 33 D k ?
ta7280,81p 2002-10-30 6 typ. dc voltage of each terminal (v cc = 13.2v, ta = 25c, dual mode test circuit ) terminal no. 1 2 3 4 5 6 7 8 9 10 11 12 TA7280P 1.5 1.5 gnd 1.5 1.5 6.4 6.4 12.3 gnd v cc 12.3 6.4 dc voltage (v) ta7281p 6.4 12.3 v cc gnd 12.3 6.4 6.4 1.5 1.5 gnd 1.5 1.5 test circuit / application circuit TA7280P (1) btl (2) dual
ta7280,81p 2002-10-30 7 ta7281p (1) btl (2) dual
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ta7280,81p 2002-10-30 13 package dimensions weight: 4.04g (typ.)
ta7280,81p 2002-10-30 14 toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the 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 specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring 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 malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation or others. the information contained herein is subject to change without notice. 000707eb a restrictions on product use

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