TOSHIBA TA8157AF/AFN TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC TA8157AF, TA8157AFN STEREO HEADPHONE POWER AMPLIFIER (1.5V USE) The TA8157AF and TA8157AFN are developed for play-back stereo headphone equipments at low voltage operation (1.5V use). Those are built in bass boost function. TA8157AF FEATURES @ OCL (Output Condenser Less) e@ Built-in ripple filter Output power (Vcc =1.5V, f= 1kHz, THD = 10%, RL = 16) Po =9mW (Typ.) SSOP24-P-300-1.00 Voltage gain : Gy =24dB (Typ.) TABIS7AFN @ Built-in boost amplifier @ Built-in power switch @ Built-in muting circuit @ Low quiescent supply current (Ta = 25C) ICCQ =8mA (Typ.) Excellent ripple rejection ratio : RR=55dB (Typ.) Low noise : Vang =254Vims (Typ.) SSOP24-P-300-0.65A Operating supply voltage range (Ta = 25C) Weight Vcc (opr) =0.9~2.2V SSOP24-P-300-1.00 : 0.32g (Typ.) SSOP24-P-300-0.65A : 0.14g (Typ.) BLOCK DIAGRAM VREF I l t a in id itp . BST ADD IRL PW RF t INe out pst dour LT nD Aycc_ ABASE ICOMPL our On) TOT WO-9 IX BST } RIPPLE |4 + t FILTER LJ ] ) BST] [ocr MT | [Pw SW. : ADDAS ADDR SW. SW. \ a OO ; EQ Or Ory RF IN o sw Pow Pp sw ON or fon ' Vee 961001EBA2 @ TOSHIBA is continually working to improve the quality and the 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 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 1/14TOSHIBA TA8157AF/AFN TERMINAL EXPLANATION (Terminal voltage : Typical terminal voltage at no signal with test circuit, Vcc =1.2V, Ta=25C) TERMINAL TERMINAL FUNCTION INTERNAL CIRCUIT VOLTAGE No. NAME (V) Boost amplifier on/off switch (Synchronized with equalizer 1 BST SW __ |circuit) _ (vec / OPEN : BST Amp. on GND : BST Amp. off 2 EQa Equalizer circuit (controlled by BST SW) 9 EQp On resistance : 600 (Typ.) 4 VREF Reference voltage 0.75 5 INA Input of power amplifier os [7 REF (This terminal is common with z 0.75 7 | INB input of adder amplifier.) - FWA 3 NFa NF of power amplifier @ 0.75 8 NFp 3 20 OUTa 30k 0.6 Output of power amplifier Ly Veg 18 OUTp 2kQ 6 PRE GND _ 0 Muting switch for power amplifier 10 | MT sw (Ycc : Power Amp. on i GND/OPEN : Power Amp. off Power switch 11 | Pw sw (vec : Power on GND/OPEN : Power off 961001 EBA2 @ The products described in this document are subject to foreign exchange and foreign trade control 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. 1997-07-07 2/14TOSHIBA TA8157AF/AFN TERMINAL TERMINAL FUNCTION INTERNAL CIRCUIT VOLTAGE No. NAME (Vv) Vee x 3 ) 12 RF IN Ripple filter terminal ep b \ 1.2 Output of Ripple filter Ripple filter circuit supplies 13 | RFE OUT |VREF Circuit, adder amplifier 1.13 and boost amplifier with power source. 14 COMP Phase-compensation terminal 07 for a ripple filter circuit 15 BASE Base biasing terminal of 05 transistor for ripple filter , 16 Vee _ _ 1.2 17 PW GND _ 0 ol VREF 19 | OUT Output of center amplifier T pwc 0.6 24 INc Input of center amplifier 2040 0.75 AW. Vrer 1.8kQ, to PWa ADDA Output of adder amplifier | Input of adder amplifier is ie 21 | ADD OUT common with input of power oe VREF 0.6 amplifier. ADDg 1997-07-07 3/14TOSHIBA TA8157AF/AFN TERMINAL TERMINAL FUNCTION INTERNAL CIRCUIT VOLTAGE No. NAME (Vv) VREF 22 BST IN Input of boost amplifier g 0.75 BST gs 9 Output of boost amplifier eS (Controlled by boost switch) BST ON: BST Amp. on 23} BST OUT (ost OFF: BST Amp. off a 0.6 (Cut off input signal of BST A VREF Amp.) 1997-07-07 4/14TOSHIBA TA8157AF/AFN APPLICATION NOTE (1) (2) (3) (4) (5) PW SW It is necessary to connect an external pull-down resistor with terminal PW SW (Pin4)), in case that this IC is turned on due to external noise etc. MT SW The leak current flows through the terminal of MT SW (Pind), in case that this terminal is connected with Vcc line independently, even though this IC is off-mode (the terminal of PW SW (Pind) is off-mode). It is necessary to connect an external pull-down resistor with terminal MT SW, in case that this IC is turned on due to external noise etc. BST SW The leak current never flows through the terminal of BST SW (Pin@) even though this terminal is at any condition, because the ripple filter circuit supplies the BST SW circuit with power source. The terminal of BST SW should not be applied higher voltage than Vcc, to prevent IC from destruction. It is necessary to connect an external pull-up resistor with terminal BST SW, in case that this IC doesnt operate normally due to external noise etc. In case that boost amplifier is on, BST SW terminal should be appliied Vec~(Vcc - 9.3V). Input of amplifier Each input signal should be applied through a condenser. In case that DC current or DC voltage is applied to each amplifier, the internal circuit has unbalance and the each amplifier doesnt operate normally. It is advised that input signal refer to voltage of Vref, in order to reduce a pop sound. Ripple filter It is necessary to connect a transistor for ripple filter, because this IC doesnt have transistor for ripple filter. Care should be taken to stabilize the ripple filter circuit, because the ripple filter circuit supplies Vref circuit, adder amplifier and boost amplifier with power source. 1997-07-07 5/14TOSHIBA TA8157AF/AFN MAXIMUM RATINGS (Ta =25C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage Vcc 4.5 Vv Output Current 10 (Peak) 100 mA ..._,... |TA8157AF 400 Power Dissipation TA8157AFN Pp (Note) 500 mw Operating Temperature Topr -25~75 C Storage Temperature Tstg -55~150 (Note) Derated above Ta=25C in the proportion of 3.2mW/C for TA8157AF, and of AmW /C for TA8157AFN. ELECTRICAL CHARACTERISTICS Unless otherwise specified : Vec= 1.2V, RL =16Q0, Rg=6000, f=1kHz, Ta =25C SW 4 : a, SW : a, SW3:: b, SW: a, SW5: a SW6 : a, SW7 : ON, SWeg : OPEN TEST CHARACTERISITC SYMBOL] CIR- TEST CONDITION MIN. | TYP. | MAX. | UNIT CUIT Power off, SW 1: b lec SW> : b 1 _ 0.1 5 LA Quiescent Supply Current [7~7_ 1 [power Amp. off, SW> . b [24 [40]. Icc3 Vin =9 _ 8 11.5 Voltage Gain 1 Gv1 _ _ 22 24 26 Channel Balance cB1 2 |Vo (A) = Vo (B) = ~ 22dBV 0 15 | 3 Vcc =1.5V Output Power 1 Po THD (A) =THD (B) = 10% 5 9 _ w Vcc =1.5V oy 2 |THD(A) =THD(B) = 10% mw % | Output Power 2 Po? Vin (a) =Vin (B) = Vin (C) 8s | 4] 2 f=100Hz, * BTL operation = SW3 : a, SW5 : b & | Total Harmonic oO _ _ Gg, = | Distortion THD 2 |Po (A) =Po(B) = MW 0.6 1 % = | Output Noise Voltage | Vno 2 |BPF =20Hz~20kHz, SW, : b = 25 40 |eVims & | Cross Talk CT 2 |Vo= 22dBV, SWg : b 35 42 | . oo. . Vcc =1.0V, f= 100Hz Ripple Rejection Ratio | RR1 2 V,= -32dBV, SW> : OPEN 45 55 _ dB Muting Attenuation ATT1 2 |Vg= -22dBV, SW2 : ab 73 1997-07-07 6/14TOSHIBA TA8157AF/AFN TEST CHARACTERISTIC SYMBOL] CIR- TEST CONDITION MIN. | TYP. | MAX. | UNIT CUIT Vj =Vj Ry = 12k0, ADD Amp. Vol in (A) = Nin (8) PL Gain mp. Voltage | G5 2 |Vo (ADD) = - 22dBV 15 | 17.5| 20 | dB SW3 : a/b ADD Amp. . Vin (A) =Vin (B) + Ry = 12k0. Bass Voltsue Output | Vom2 2 THD (ADD) = 1%, SW3 : a/b 80 130] |MVrms 00s Function | BST Amp. Voltage G 2 Vo = - 37dBV, RL = 16k0, 14 16.5 19 dB Stage Gain V3 SW65 > b , BST Amp. -_ _ Maximum Output | Vom3 2 awe een =3%, RL=16k0 55 90) |mMVrms Voltage 6 BST Amp. Vo = - 32dBV, SW3 : aob Attenuation ATT3 2 SW6 : b 7 73) | 4B Ripple Filter Output Voltage |VrrouT| 2 |Vcc=1V, IRF=20mA 0.9 | 0.93} Vv Vcc =1V, IRF=20mMA Ripple Rejection Ratio RR4 2 |fp=100Hz, Vy = -37dBV 35 43); dB SW7_: OPEN . . lEQ= 100A, SW3: a Equalizer On Resistance RON 1 SWe : ON 60; Q Vcc =0.9V, V4=0.5V Power On Current 144 1 SW: , SW> : b 5 LA Switch Vcc =0.9V, V4=0.2V _ Off Voltage Va4 1 SW, : d, SWo : b 0 03 | Vv Veco =0.9V, Icc24.5mA Off Current | 1 5} A Mute ua 0 SW) : - Switch Vcc =0.9V, Icc=3.5mA _ On Voltage Vio 1 SW: d 0 0.3 Vv Vcc =0.9V, leg = 100A Off Cc t | 1 5} | A Boost urren \ V220.7V, SW3 : c, SWg : ON M Switch Vcc =0.9V, leg = 100A _ On Voltage V1 1 V7=0.2V, SW3 : d, SWg : ON 0.6 0.9 Vv 1997-07-07 7/14TOSHIBA TA8157AF/AFN TEST CIRCUIT 1 sW3 (c) 3 (d) o (1) ast sw g oT - r@) Qn G NFa [ SW3 -(4) VREF G INA 22 KF + oo SW2 (b) L @ Few r (6) PRE GND ee ma @) Ng G NFp ? @) L@) cos 0) MT sw SW 1 oO (d) (a) 1 (b) eo SO ow sw Nw (*) Tantalum condenser (d) 12) RF IN 4.7 ME + Nc Q4) BST OUT @3) BST IN Q2) ADD OUT Qi) O.1uF 8.20 OUT 66)7t SY OUT 3}p*+ a o OUTB @g+_1*28_4 Pw GND (1 vec G comp (i RF OUT G + 6 BASE 3_K 2SA1362-Y 4 | 4.70, ab @)14F 100pF + 10 F O Vcc 1997-07-07 8/14TOSHIBA TA8157AF/AFN TEST CIRCUIT 2 sw3 a, Rg = 60001 _| , 1eF () S-G)4 vec wee? BST SW INc Qtr" ] (b) (a) y 6000 OA7pF SWs @) Qa BST OUT @3-AH_ S + 22uF 1a (b) 4 e ican G) Nea BST IN Qtr0 - We 6000 1 +_() Vrer ADD OUT Gt S 6000 (b) 1 WE O1eF 8.20, s 2 et it 5) INA OUTA @D4 f ~ swaa () Ss 470, Rg = 6000, 6) PRE GND OUTe (9}et #4 4 owns a c 7 nat (a) ez S ~o17) Ng OUT ag} 222 4 oi VF 0.1 42F 6000 (b) (8) NFp PW GND (17 + 7 f= 100Hz O-7 Vec L _______, (a) SW7 + sW2 ~o(10) mt sw BASE 63_K 25A1362-Y * I Vee rT 4 (b) Swi (i1) Pwsw comp (14-4K4 @) EQp vec G ov 47 ek 12) RF IN RF OUT (13-#O RF OUT 47 MF + + 10 &F (*) Tantalum condenser 1997-07-07 9/14TOSHIBA CHARACTERISTIC CURVES Unless otherwise specified TOTAL HARMONIC DISTORTION THD (%) QUIESCENT SUPPLY CURRENT icc (mA) OUTPUT POWER Po (mW) lec - Vec 12 Iec2 1 1.5 SUPPLY VOLTAGE Vcc THD - Po4 f=100Hz f=1, 10kHz 2 ) 2.5 05 i 2 5 10 20 OUTPUT POWER Po, (mW) Po - Vcc 30 THD (A) = THD (B) = 10% 20 Poo (BTL) La Le a 10 femme I pn | Pot 7 a 0 < 1 15 2 2.5 SUPPLY VOLTAGE Vcc ) TOTAL HARMONIC DISTORTION THD (%) OUTPUT DC VOLTAGE Vo (V) RIPPLE REJECTION RATIO RR (dB) TA8157AF/AFN > Vec=1.2V, RL = 160, Rg=6000, f=1kHz, Ta =25C Vo - Vcc Vo 1 15 2 2.5 SUPPLY VOLTAGE Vcc (V) THD - Po2 f= 100Hz f=1, 10kHz 0.5 1 2 5 10 20 OUTPUT POWER Po2 (mW) RR - Vec PW : f= 100Hz, Vr= -32dBV RE : fp=100Hz, Vy= 37dBV, Ipp=20mMA 1 1 1 s 1 15 2 2.5 SUPPLY VOLTAGE VCC (V) 1997-07-07 10/14TOSHIBA TA8157AF/AFN Gy - f cT - f Vo (A) = Vo (B) = 220BV = = = co > = v 5 = < 3 uo < : ww 5 = Oo wu > 1 30 100 =: 300 1k 3k 10k 30k 30 100 = 300 1k 3k 10k 30k FREQUENCY f (Hz) FREQUENCY f (Hz) Vom2 - Vcc Vom3 - Vcc 150 15 8 82 E E aS tor a> gf of eM ? 5 a = 100 a & 10 E Ee 2 > a D2 > | arm += 3 / = = t > D> f = = / 3 3 s 50| s 50] a Vin (A) = Vin (B) & < THD (ADD) =1% < a & THD (BST) =3% = "n 2 RL = 12kQ. a RL =16kQ. Ol ol 1 15 2 25 0 1 15 2 2.5 SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE vcc (Vv) VRF OUT 'RF Icc - Ta < S vec =1.5V E wu aed Vec=1.2V VRF OUT Vec=1V RIPPLE FILTER OUTPUT VOLTAGE QUIESCENT SUPPLY CURRENT 0 20 40 60 80 -20 0 20 40 60 80 RIPPLE FILTER OUTPUT CURRENT Ire (mA) AMBIENT TEMPERATURE Ta (C) 1997-07-07 11/14TOSHIBA Vo - Ta = > La OQ < B ol 3} > vv a k 2 oO FE 2 3 -20 0 20 40 60 AMBIENT TEMPERATURE Ta (C) Gy - Ta ao 2 > oO = & S ADD AMP. tit 7] < FE 3 2 BST AMP. -20 i) 20 40 60 AMBIENT TEMPERATURE Ta (C) Vom3 Ta THD (BST) = 3% RL= 16kQ. Vom3 (Vrms) BST AMP. MAXIMUM OUTPUT VOLTAGE -20 0 20 40 60 AMBIENT TEMPERATURE Ta (C) 80 80 80 (mw) ADD AMP. MAXIMUM QUTPUT VOLTAGE QUTPUT POWER Po Vom2 (Vrms) TA8157AF/AFN Po Ta Pg2 (BTL) Vcc=1.5V THD (A) = THD (B) = 10% -20 0 20 40 60 80 AMBIENT TEMPERATURE Ta (C) Vom2 - Ta Vin (A) = Vin(B) THD (ADD) = 1% RL=12kQ, -20 0 20 40 60 80 AMBIENT TEMPERATURE Ta (C) 1997-07-07 12/14TOSHIBA TA8157AF/AFN OUTLINE DRAWING SSOP24-P-300-1.00 Unit : mm 24 13 ; HHBBAAAAARAH fF A] = FF S fil emt Z 1.0TYP; | _ 0.440.1 10.20) Le 13,5MAX ; 13.0+0.2 . ; : 8 39 \ wn TH =| y ft |__|, 0.525+0.2 Weight : 0.32g (Typ.) 1997-07-07 13/14TOSHIBA TA8157AF/AFN OUTLINE DRAWING SSOP24-P-300-0.65A Unit : mm 24 13 HHRHARRHREE | rl 5.6+40.2 7,640.3 O 1 12 0.325TYP 0.22401 rors 10.13) 0.65 __B.3MAX_ 7840.2 a oO 2% <2 aee q Tino! SI 2 in Oo o " | | 0.45+0.2 So Weight : 0.14g (Typ.) 1997-07-07 14/14