TA7628

TA7628P TOSHIBA | Alldatasheet

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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA7628P, TA7628HP AMPLIFIER SYSTEM FOR CASSETTE TAPE RECORDER TA7628P and TA7628HP are Pre + Power amplifier system designed for cassette tape recorder.

FEATURES

© Recording Playback for Pre Amplifier - — @ Buffer Amplifier (Recording Amplifier) hot m— pl \\ | @ Power Amplifier \\ + \\ | @ ALC Detector Circuit @ Muting Circuit @ Maximum Output Power (Vcc =6V, f= 1kHz, THD = 10%) DIP16-P-300-2.54A : Pout =0.6W (Typ.) (RL=80) : TA7628P Weight : 1.00g (Typ.) : Pout =0.96W (Typ.) (RL =4) : TA7628HP © Low Distortion and Wide Dynamic Range @ Without Turn-on “POP” for Muting Circuit @ Operating Supply Voltage Range : Vee (opr) =3-5~9V (Ta =25°C) BLOCK DIAGRAM PRE PRE PRE PRE BOOT GND INPUT NF OUTPUT FILTER I FILTER T Vcc_— STRAP ee | PRE AMP. BUFFER POWER ALC BUFFER BUFFER N.C POWER POWER POWER POWER INPUT OUTPUT NF © (GND) INPUT = NF GND OUTPUT 961001EBA2 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 observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product 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 products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook 1997-07-07 1/12

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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 1997-07-07 2/12

1. Precaution of GND line if The GND points of input side GND and N.F side GND in each INPUT O ooureut amplifier must be arranged at the preamplifier side. (Fig.1) The input side GND point and the N.F side GND point must Lia be arranged near each other to have no impedance. INPUT side GND JE power eno NF side GND 2. About radiation Fig. ig. 1) The capacitance between the output and GND in preamplifier, buffer amplifier Bhd power amplifier must be arranged near to this IC. The radiation loop must be as small as possible. 2) The voltage gain of high frequency in each amplifier must be reduced to reduce the noise with high frequency component. (In the application circuit, the feed back capacitor is used) A 1000pF or same order capacitor must be connected from the input terminal of preamplifier and power amplifier to GND to prevent the interference of radiation. 3) It is better for this IC to separate adequately from the antenna in the radio cassette tape recorder applications. 4) The electrolytic capacitance 100F~220,.F between Vcc and GND must be arranged near to this Ic. 3. To prevent the oscillation 1) The output terminal of preamplifier must be terminated to GND by the capacitance more than 5600pF. (The recommended value : C=0.01,F) 2) The output terminal of buffer amplifier must be terminated to GND by the capacitance more than 0.01,F. (The recommended value : C=0.01,F) 3) The output terminal of power amplifier must be terminated to GND by the good temperature characteristic capacitance of 1~2.2F. The bootstrap terminal must be terminated to GND with the capacitance more than 0.47F. 4. Precaution of preamplifier 1) It is better that the coupling capacitor between the volume and the output of preamplifier is small. Recommended value : C=0.47uF 2) In recording mode, the signal source resistance must be more than 1kQ for ALC (Automatic Level Control) operation. When this resistance is small, the ALC range becomes narrow. 1997-07-07 3/12

1. Buffer amplifier When the output signal is clipped in the buffer amplifier, this signal returns to preamplifier and influences to make THD bad. ce To prevent this, in playback mode, the buffer amplifier is recommended s to be cut-off by terminating the output terminal to GND directly or by Sh sw terminating the feedback terminal to GND through 3300 or less than a this shown in Fig.2. 6. Power amplifier Fig.2 1) In case of the battery use (Vcc 6V), this IC is happen to oscillate (blocking oscillation) when the impedance of power supply is high. Ra Pec In this case, it is recommended to insert the resistance Ra of Zz 5002~1kO between @pin and @pin (Vcc-Filter II). By this (39> method, this IC becomes very stable. But the output DC voltage is not center by the influence of Ra. Then the output wave shape is oO. ® not symmetrical clipping wave and the maximum output voltage is . | Output reduced. So we recommend to insert the other resistance Rg between “ ©pin and ®pin for compensating the output DC voltage. s 4 2) When you use this IC at the supply voltage of more than 6Y, it is better to insert the resistance Rg for compensating output DC Fig.3 voltage. (Fig.3) The recommended value : {Rg =220k0 at Vcc =7.5V Rg =150kQ at Vcc=9V 3) The output coupling capacitance and bootstrap capacitance is better to be large because of getting the maximum output power. 4) On the PC board, the interval between Vcc and GND is better to be large. MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL RATING TA7628P [9 Supply Voltage TA7628P [| 0.56 | Power Dissipation Pp (Note) mW Operating Temperature —20~75 Storage Temperature —55~150 (Note) Derated above Ta=25°C in the proportion, 6.0mW/°C for TA7628P, 9.6mW/°C for TA7628HP. 1997-07-07 4/12

ELECTRICAL CHARACTERISTICS (TA7628P) (Unless otherwise specified, Vcc =6V, f= 1kHz, Ta =25°C) TOTAL TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT [Quiescent Curent | Teco | — |vec=35V D7 = per] ieeot) | = vec =6v Dose Fa] PRE AMP. TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Open Loop Voltage Gain Gyo1 55 | 70 Closed Loop Voltage G Gain vt Maximum Output stage” | vows | = frome | = | 0? | = [ve TA OO Equivalent Input Noise - PRE AMP. + BUFFER AMP. TEST CHARACTERISTIC SYMBOL | CiR- TEST CONDITION TYP. | MAX. | UNIT CUIT Closed Loop Voltage G Pre amp. Gy=40dB Gain v2 Buffer amp. Gy =20dB Maximum Output _ 39 Output Neise Voltage | Vno2 | — |Rg=0, Gya=60d8 [= [2 25 rv Vin =0.775mVrms (- 60dBm) ALC Effect ALC1 | - | ~0.0775Vrms (~20d8m) ALC Range | atc2_ | — [Range of THDS1% | — {[ 60 | — | ab | POWER AMP. TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Open Loop Voltage Gain Svo3 70 Closed Loop Voltage G Gain v3 foutput Power | Poe | — |Ri=80, THD= 10% pes [oe | — [Ww _| Output Noise Voltage | Vno3 | — [Rg=0, Gy=40dB [= [03 [40 fives 1997-07-07 5/12

ELECTRICAL CHARACTERISTICS (TA7628HP) (Unless otherwise specified, Vcc = 6V, f= 1kHz, Ta = 25°C) TOTAL TEST CHARACTERISTIC SYMBOL | CiR- TEST CONDITION TYP. | MAX. | UNIT CUIT [Quiescent current | tecgay | — |vec=3.v [7s — | — [ma | [Quiescent current | Ico | — lvec=ev Sd | — | 35 me | PRE AMP. TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Open Loop Voltage Gain Svo1 70 Closed Loop Voltage G Gain vi Maximum Output 40 Sore [on | feo Soe Equivalent Input Noise - al PRE AMP. +BUFFER AMP. TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Closed Loop Voltage G Pre amp. Gy=40dB Gain v2 Buffer amp. Gy = 20dB Maximum Output _ 20 Output Noise Voltage | Vno2 | —|Rg=0, 6ya= 6008 = [42 | 25 frag Vin =0.775mMVrms (- 60dBm) ALC Effect auc | - | ~0.0775Vrms (- 20dBm) 2 ALC Range | Atc2_ | — [Range of THDS1% | — | 60] — | aB | POWER AMP. TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Open Loop Voltage Gain Svo3 70 Closed Loop Voltage G Gain v3 RL =a, THD= 10% [os [036 | — | Output Power Pout | = | Vec=9V, RL=80, THD=10% | — | 14] — | © Output Woke Voltage | Vos | — [Ry=0. Gy=40d8 = [03 | 70 frig 1997-07-07 6/12

_ eS 3 INTERLOCK (1, 2=OFF, 3=ON) i ° © PRE g st ourput 0 vec ' 7 RE 93 | Se i Fal 5 al! » P22 |o sw, _87pF 33k S60pF . = @~ o at, Shy 8 2 ; cy 3) ) © @ —) > es 35d {swe ° TA7628P , © ora fea sry ore Sg 3 (+) S6opF 8 +S rower ahs fils (Note 1) ouruT 47 pF © BUFFER é asg OUTPUT ° ese pet. sw2 I S I a (*) Use in measuring the output noise voltage. (Note 1) TA7628HP : 0.047F — 0.068F (Note 2) TA7628HP : 470/F — 1000uF 1997-07-07 7/12

; Va, IccQ - Voc 40 3 THD - Vout a 3 encame | | IT TTT [if ff aeorr Pe gE Vec=6v YEA 6 2 Ta=25°C | > @ oe 2 go 2 See ea eos b § 8 Fee ——— a | Pana =<. 8 a e & a Sane a | 2 , TTT tt Perl ¢ & of NI 3 bot be Lecce 8 og JING ‘ite 5 jt tt tr ctr), = 8 ined | 5 | |] leer 8 2 of NN fd tiijvari i Pitt | 3 epee ON ff Peat 8 oo SSE SSA LELETTTTETT YT TI, oosk CAT 345.6. 7 89 002005 01 03.05.12 SUPPLY VOLTAGE Vcc (V) OUTPUT VOLTAGE Vout (Vrms) Vg, Iccq - Ta Gvo, Gy - f 40) Og - [fev AY s & 8 a PREAMP TTT ATT)

2 Vec=6v and veces COCO

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ka alt ie é Ec canon 3 [ 2 2g SRR Cr 6 Cor rh s 2. 3 & 00 Ts, 5 29 wo Fg ZO TT NT e TL LiL ili Lill @o & Eee oc 2 2 S oof EI ees ° ffi titi ete yy 5 8 a 10 & to LCE rn -20 0 20 40 60 80 10 30 100 300 tk 3k 10k «30k = 100k AMBIENT TEMPERATURE Ta (°C) FREQUENCY f (Hz) Vout, THD - Vin G -f "0 a's vor Tt Joe Se. © 2 a ce 3 f= 1kHz Con ° | a eee 1 par af RTs = Z $ LL 3 ke A 8 kp SF Be STZ No SA tquatizer g SEA ee eB 2 3A ec ot oe 88g re 5 y a or (Cert SS

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2 oosf— ESS tet tos £ S59 sul [ac ore m0 | HHH © 40) ranase § COI CO oo ALC OFF THO an ook A xo CE F rr 0.1 0305 1 3.5 10 3050 100 300500 10 ©3050 100 300500 1k 3k 5k 10k 30k50k100k INPUT VOLTAGE Vin (mVrms) FREQUENCY f (Hz) 1997-07-07 8/12

Gyo, Gy - f THD = Pout (TA7628HP) i a g * | & POWER AMP. eo CHIIICITI TTT} POWER ame. = veer |) |_| a MCC) vec=ev 2 if mean SCM II TTT gee ase = pes SSS & “CCHIT oe HH 2 So

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3 “CA ooo $ of ee 747. a 2 SOC 0 Ze Fi IP | aot Ln on 10 30 100 300 1k 3k 10k = =30k = 100k 0.03 01 03 1 3 FREQUENCY f (Hz) OUTPUT POWER Pout (W) THD - Pout THD - Pout — (TA7628HP) s 30) a 30) ‘l= (i ¢ ea ‘see LLL |

2 Vec=6v I 2 /

2 19 Sei eerie fete 2 aol fe tktz ! z= =80 ARH - oe aes ons | RL fees aoe eet tt i] Gat . reese Pt ff a jee San 8 S-Se—a— Oo co om BH Has 160 {eof-aaft} J eC IE TIE ol ae Tal A AL SRS EHRs a TTT TP | g RSS SEE rons EHH g 0 —— — — —--- | 3 os ERS ed Sass 2 03 Hei eeseaitoore PE a a | Bp TS Eff 2 Co ee

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OUTPUT POWER Pout (W) OUTPUT POWER Pout (W) THD - Pout — (TA7628HP) Pout - Vcc = 30) 0.7, g power ame. [11 ITT 4 T | fa tkHz TTT Ty Ty r Ta=25°C —— see | = 2 enact eco eos seen 3 /\\ & 3 es eo o3 A 8 10K a « R-80 e LLU TT : [7 Pe) ee ee 8 7] ===. ——— === | g RHE no — 5 / gO oe et 5 = 93} ee ee 3 2 “Ce ni } P COMM 1 (anne Sees on Lj | TT iz yr 0.03 0.1 03 1 3 1 2 3 4 5 6 7 OUTPUT POWER Pout (W) SUPPLY VOLTAGE Vcc (V) 1997-07-07 9/12

5 Pout - Vcc (TA7628HP) os Pp - Vcc

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0 ttlttit tt tt ttt | 0 2 4 6 8 10 12 14 1 2 3 4 5 6 7 SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE Vcc (V) Pp - Vcc __(TA7628HP) Pp - Ta 14 1 fT TTT TTT yt yy. HA nrmour wear sin | EEEEE EEE oe | g ERE rout Hear sink s VOC & POCPMEPEE 2 ae ee 2 COOKE eg “LETT TTT TAT TT TT Ps Se eNEe eee 2 of LEE E Pry € tPA e Hn aaa Jo | 6 eee g jt. J 7 ET = ood LE OKC NE

2 PV Ae fT 3 PTT PNET NE TET TT

= wd ttt 7s eof PEE rae ON ETT Fa PIT) ZA Tt A Lt TTI ESN crecsie | re a a Ae oe eee a § VCC PCC CeCe eA o LETT TTT ty tT Ty «= LETT Pi yi te EAN CY 20 a0 608 T0D 120-140 760 SUPPLY VOLTAGE Vcc (V) AMBIENT TEMPERATURE Ta (°C) 1997-07-07 10/12

[5@ Jerr 0.01 uF O vec mic ao 330K boone] ——_220uF Rb pT if a a os Cr a OO a TY 3.3 uF aS | ue a ne PR i = ‘ Hean \\3—> > a FkO C1] 70F 9 § [loop m7 BIAS < 8 g La! S| Sze]. Al RECORDING EQ Fis} & SW5 § SW1~SW6¢ are set for play back. SW Functions. 1997-07-07 11/12

DIP16-P-300-2.54A Unit : mm cs) 16 9 3 et ee | ag ») g 8 | | 2 pu 19.75MAX 0.9 LU ap—2 yr ot og WO EE sh z 2 Weight : 1.00g (Typ.) 1997-07-07 12/12