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TA8210AH / al 2002-10-30 1 toshiba bipolar linear integrated circuit silicon monolithic TA8210AH,ta8210al 20w btl 2ch audio power amplifier the thermal resistance j ? t of ta82 1 0ah, ta82 1 0al package designed for low thermal resistance, has a high efficiency of heat radiation. the temperature rise of chip can be reduced, and the influence from the degradation of the features due to the temperature rise at the high output can also be reduced. this stereo audio power ic, designed for car audio use, has two built ? in channels to reduce the characteristic difference between l and r channels. in addition, the functions of stand ? by and muting, and a variety of protection circuits are involved. features low thermal resistance : j ? t = 1 .5c / w (infinite heat sink) high power : p out ( 1 ) = 22w (typ.) / channel (v cc = 1 4.4v, f = 1 khz, thd = 1 0%, r l = 4 ? ) p out (2) = 1 9w (typ.) / channel (v cc = 1 3.2v, f = 1 khz, thd = 1 0%, r l = 4 ? ) low distortion ratio: thd = 0.04% (typ.) (v cc = 1 3.2v, f = 1 khz, p out = 1 w, r l = 4 ? , g v = 50db) low noise: v no = 0.30mv rms (typ.) (v cc = 1 3.2v, r l = 4 ? , g v 50db, r g = 0 ? , bw = 20hz~20khz) built ? in stand ? by function (with pin(4) set at low, power is turned off.): i sb = 1 a (typ.) built ? in muting function (with pin( 1 ) set at low, power is turned off.): v (mute) = 1 v (typ.) built ? in various protection circuits protection circuits: thermal shut down, over voltage, out v cc short, out gnd short and out ? out short. operating supply voltage: v cc = 9~ 1 8v weight hzip17 ? p ? 2.00: 9.8g (typ.) hsip17 ? p ? 2.00: 9.8g (typ.)
TA8210AH / al 2002-10-30 2 block diagram TA8210AH, ta8210al (g v = 50db) cautions and application method (description is made only on the single channel.) 1 . voltage gain adjustment this ic has the amplifier construction as shown in fig. 1 . the pre amp (amp 1 ) is provided to the primary stage, and the input voltage is amplified by the flat amps, amp 3 and amp 4 of each channel through the phase amp. (amp 2). since the input offset is prevented by pre amp when v cc is set to on, this circuit can remarkably reduce the pop noise.
TA8210AH / al 2002-10-30 3 the total closed loop gain g v of this ic can be obtained by expression below when the closed loop voltage gain of amp 1 is g v 1 . (db) r2 f r r2) f (r r1 og 20 v1 g ..... ( 1 ) the closed loop voltage gain of power amp, amp 3 and amp 4 is fixed at g v3 P g v4 = 20db. therefore, the total closed circuit voltage gain g v is obtained through btl connection by the expression below. g v = g v 1 + g v3 + 6 (db) ............... (2) for example, when r f = 0 ? , g v is obtained by the expressions ( 1 ) and (2) as shown below. g v P 24 + 20 + 6 = 50db the voltage gain is reduced when r f is increased. (fig.2) with the voltage gain reduced, since ( 1 ) the oscillation stability is reduced, and (2) the pop noise changes when v cc is set to on, refer to the items 3 and 4. fig.2 2. stand by sw function by means of controlling pin(4) (stand by terminal) to high and low, the power supply can be set to on and off. the threshold voltage of pin(4) is set at 2. 1 v (3v be .), and the power supply current is about 1 a (typ.) at the stand by state. pin(4) control voltage : v (sb) stand by power v (sb) (v) on off 0~2 off on 3~v cc fig.3 with pin(4) set to high, power is on. advantage of stand by sw ( 1 ) since v cc can directly be controlled to on / 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.
TA8210AH / al 2002-10-30 4 3. preventive measure against oscillation for preventing the oscillation, it is advisable to use c 4 , the condenser of polyester film having small characteristic fluctuation of the temperature and the frequency. the resistance r to be series applied to c 4 is effective for phase correction of high frequency, and improves the oscillation allowance. since the oscillation allowance is varied according to the causes described below, perform the temperature test to check the oscillation allowance. ( 1 ) voltage gain to be used (g v setting) (2) capacity value of condenser (3) kind of condenser (4) layout of printed board in case of its use with the voltage gain g v reduced or with the feedback amount increased, care must be taken because the phase inversion is caused by the high frequency resulting in making the oscillation viably generated. 4. input offset prevention circuit at v cc on having pre amp (amp 1 ) mounted on the primary stage, this ic contains the circuit for making the amp 1 input voltage and the nf terminal voltage equipotential. therefore, the offset voltage produced at the input stage is suppressed to prevent the pop noise at v cc on. the capacity values of the input and nf condenser (c 1 and c 2 ) shall be set according to the gain to be used. (reference) (a) at g v = 50db (r f = 0 ? ) c 1 = 4.7f, c 2 = 47f (b) at g v = 40db (r f = 470 ? ) c 1 = 3.3f, c 2 = 33f
TA8210AH / al 2002-10-30 5 5. muting function through setting pin( 1 ) (mute terminal) at about 1 v or less, muting becomes possible. the interval circuit of ic is shown in fig.4. when pin( 1 ) is set to low, q 1 and q2 are turned to on, the charge of the ripple condenser is discharged and the bias is cut. the mute amount of 60db or over can be obtained. since this muting function rapidly discharge the charge of the ripple filter capacitor of pin(8), the pop noise is generated by the dc fluctuation of the bias section. therefore, this muting function is not appropriate to the audio muting but it is effective in muting at v cc on. 6. external part list and description influence sym bol recom mended value feature smaller than recommended value larger than recommended value remarks c 1 4.7f dc blocking related to pop noise at v cc on. related to gain. refer to item 4. related to pop noise at v cc on. c 2 47f feedback condenser determination of low cut off frequency. c 2 = f r l f 2 1 ? ? c 3 220f ripple reduction time constant is small at v cc on or off. time constant is large at v cc on or off. c 4 0.12f oscillation prevention made liable to oscillate. oscillation allowance. refer to item 3. c 5 1000f ripple filter for filtering power supply hum and ripple. large at using ac rectified power supply. small at using dc power supply. c 6 1000 p f oscillation prevention oscillation allowance improved. noise reduction refer to item 3.
TA8210AH / al 2002-10-30 6 maximum ratings (ta = 25c) characteristic symbol rating unit peak supply voltage (0.2s) v cc (surge) 50 v dc supply voltage v cc (dc) 25 v operating supply voltage v cc (opr) 18 v output current (peak) i o (peak) 9 a power dissipation p d 50 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 ? , f = 1khz, ta = 25c) characteristic symbol test cir cuit test condition min. typ. max. unit quiescent supply current i ccq D v in = 0 D 120 250 ma p out (1) D v cc = 14.4v, thd = 10% D 22 D output power p out (2) D thd = 10% 16 19 D w total harmonic distortion thd D p out = 1w D 0.04 0.4 % voltage gain g v D D 48 50 52 db output noise voltage v no D r g = 0 ? , bw = 20hz~20khz D 0.30 0.70 mv rms ripple rejection ratio r.r. D fripple = 100hz, r g = 600 ? 40 54 D db input resistance r in D D D 30 D k ? output offset voltage v offset D v in = 0 0.3 0 0.3 mv current at stand ? by state i sb D D D 1 10 a cross talk c.t. D r g = 600 ? , v out = 0.775v rms (0dbm) D 60 D db pni(4) control voltage v sb D stand by off (power on) 2.5 D v cc v pin(1) control voltage v (mute) D mute on (power off) D 1.0 2.0 v
TA8210AH / al 2002-10-30 7 test circuit TA8210AH, ta8210al (g v = 50db)
TA8210AH / al 2002-10-30 8
TA8210AH / al 2002-10-30 9
TA8210AH / al 2002-10-30 10 package dimensions weight: 9.8g (typ.)
TA8210AH / al 2002-10-30 11 package dimensions weight: 9.8g (typ.)
TA8210AH / al 2002-10-30 12 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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