TA8256BH TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8256BH Audio Power Amplifier 6 W × 3 Ch TA8256BH is 3 channel audio power amplifier for Consumer applications. This IC provides an output power of 6 watts per channel (at VCC = 20 V, f = 1 kHz, THD = 10%, RL = 8 Ω). It is suitable for power amplifier of TV and home Stereo. Features · High output power: Pout = 6 W (Typ.) · Built-in audio muting circuit. · NF terminal capacitor less (VCC = 20 V、RL = 8 Ω、f = 1 kHz、THD = 10%) : · Weight: 4.04 g (typ.) Fixed gain (Gv = 34dB), needless external capacitor. Protectors : Thermal shut down protection circuit, over voltage protection circuit · Low poping noise · High THD ratio · High input dynamic range · Available for using same PCB layout with 2 channel IC: TA8246AH · Operating supply voltage range : VCC (opr) = 10~30 V (Ta = 25°C) 1 2002-02-13 TA8256BH Block Diagram VCC 6 RIPPLE FILTER 9 Amp 1 OUT1 350 W 8 RL 20 kW 3 Pre-GND V18 2.1 V 4 30 kW 4 kW INPUT1 PW-GND 10 RL 20 kW 350 W Amp 2 4 kW 2 INPUT3 1 OUT2 12 30 kW INPUT2 30 kW 4 kW Amp 3 OUT3 11 RL 350 W 20 kW 5 7 MUTE SW 2 MUTE T.C. 2002-02-13 TA8256BH Terminal Explanation Terminal No. 1 Symbol Function Equivalent Circuit VCC IN3 1, 2, 4 IN2 Input 30 kW 2 20 kW OUT 350 W 4 kW IN NF 4 IN1 3 Pre-GND GND ¾ GND terminal VCC 5 MUTE SW 7 7 to MUTE Amplifier 10 kW MUTE control terminal 5 MUTE T.C. 10 kW GND 6 R/F to POP-NOIZE preventive circuit Ripple filter to Bias circuit 5.1 kW 6 8 OUT1 VCC 8, 11, 12 Output 11 OUT3 12 OUT2 9 VCC Supply voltage terminal ¾ 10 PW-GND GND terminal ¾ 2.2 kW OUT GND 3 2002-02-13 TA8256BH Cautions This IC is not proof enough against a strong E-M field by CRT which may cause malfunction such as leak. Please set the IC keeping the distance from CRT. Maximum Ratings (Ta = 25°C) Characteristic Supply voltage Output current (peak/ch) Power dissipation Symbol Rating Unit VCC 30 V IO (peak) 2 A PD (Note) 25 W Operating temperature Topr -20~75 °C Storage temperature Tstg -55~150 °C Note: Derated above Ta = 25°C in the proportion of 200 mW/°C. Electrical Characteristics (Unless otherwise specified, VCC = 20 V, RL = 8 W, Rg = 620 W, f = 1 kHz, Ta = 25°C) Symbol Test Circuit ICCQ ¾ Vin = 0 Pout (1) ¾ THD = 10% Pout (2) ¾ THD = 1% THD (1) ¾ Pout = 2 W THD (2) ¾ Pout = 2 W, f = 10 kHz, Voltage gain Gv ¾ Vout = 0.775 Vrms Input resistance RIN ¾ Ripple rejection ratio R.R. ¾ Output noise voltage Vno Characteristic Quiescent current Output power Total harmonic distortion Cross talk Mute control voltage Mute attenuation level Test Condition Min. Typ. Max Unit 65 100 180 mA 5 6 ¾ ¾ 4.5 ¾ ¾ 0.04 0.2 ¾ 0.1 0.6 32.5 34 35.5 dB ¾ 34 ¾ kW f = 100 Hz, Vripple = 0.775 Vrms -40 -47 ¾ dB ¾ Rg = 10 kW, BW = 20 Hz~20 kHz ¾ 0.14 0.3 mVrms dB ¾ % C.T. ¾ Vout = 0.775 Vrms ¾ -60 ¾ Vth (ON) ¾ MUTE ON 3.1 ¾ VCC Vth (OFF) ¾ MUTE OFF 0 ¾ 2.5 ATT ¾ Vout = 0.775 Vrms ® Mute -52 -60 ¾ 4 W V dB 2002-02-13 TA8256BH 6 RIPPLE FILTER 9 VCC 1000 mF 100 mF Test Circuit 4 kW 1000 mF OUT1 20 kW 3 Pre-GND V18 2.2 W 20 kW 350 W Amp 2 4 kW 2 1.0 mF OUT2 RL 12 1000 mF 30 kW INPUT2 RL PW-GND 10 0.10 mF 350 W 8 0.10 mF Amp 1 2.2 W 1.0 mF 2.1 V 4 30 kW INPUT1 4 kW OUT3 350 W 11 20 kW 5 0.10 mF 1000 mF Amp 3 2.2 W 1.0 mF RL 7 MUTE SW 5 10 mF 1 30 kW INPUT3 MUTE T.C. 2002-02-13 TA8256BH ICCQ, Vout (DC) – VCC THD – f 30 200 20 10 10 VCC = 20 V 5 Pout = 2 W 3 RL = 8 W 1 Total harmonic distortion ICCQ 100 THD (V) Vout (DC) Output voltage Vout (DC) Quiescent current ICCQ (mA) (%) 300 0.5 0.3 0.1 0.05 0.03 0.01 30 0 0 4 8 12 16 20 24 Supply voltage VCC 28 32 100 0 36 300 10 k 30 k 100 k (Hz) (V) THD – Pout THD – Pout 30 VCC = 20 V f = 1 kHz RL = 8 W RL = 8 W 10 5 5 (%) 10 3 3 VCC = 12 V 20 28 THD THD (%) 3k Frequency f 30 1 Total harmonic distortion Total harmonic distortion 1k 0.5 0.3 0.1 f = 10 kHz 0.05 1 0.5 0.3 0.1 0.05 f = 1 kHz 0.03 0.03 f = 100 Hz 0.01 0.01 0.3 0.5 1 3 5 Output Power Pout 10 30 0.3 (W) 0.5 1 3 5 Output Power Pout 6 10 30 (W) 2002-02-13 TA8256BH Pout – VCC Gv – f 70 f = 1 kHz 18 RL = 8 W THD = 10% 16 VCC = 20 V 14 (dB) 50 12 Gv 60 Vout = 0.775 Vrms RL = 8 W 40 10 Voltage gain Output power Pout (W) 20 8 6 30 20 4 10 2 0 0 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 Supply voltage VCC 30 100 (V) 300 R.R. – f 30 k 100 k 30 k 100 k 30 k 100 k (Hz) C.T. – f C.T. (dB) VCC = 20 V RL = 8 W -10 R = 0 g Vripple = 0.775 Vrms -20 -30 Cross talk Ripple rejection ratio R.R. (dB) 10 k 0 -40 -50 -60 VCC = 20 V RL = 8 W -10 V out = 0.775 Vrms Rg = 10 kW -20 -30 -40 -50 -60 30 100 300 1k 3k Frequency f 10 k 30 k -70 100 k 30 100 (Hz) 300 1k 3k Frequency f Vno – Rg 10 k (Hz) R.R. – Rg 0 1.6 1.0 Ripple rejection ratio R.R. (dB) (mVrms) Vno VCC = 20 V 1.4 RL = 8 W BW = 20 Hz~20 kHz 1.2 Output noise voltage 3k Frequency f 0 -70 1k 0.8 0.6 0.4 0.2 100 300 1k 3k 10 k 30 k -30 -40 -50 -60 -70 0 30 VCC = 20 V RL = 8 W -10 f ripple = 100 Hz Vripple = 0.775 Vrms -20 100 k Signal source resistance Rg (9) 30 100 300 1k 3k 10 k Signal source resistance Rg (9) 7 2002-02-13 TA8256BH PD – Pout C.T. – Rg 18 -30 -40 -50 12 V CC = 28 V 10 THD = 1% 10% 8 20 V 6 4 12 V -60 -70 Dual 16 f = 1 kHz RL = 8 W 14 PD (W) VCC = 20 V f = 1 kHz -10 R = 8 W L Vout = 0.775 Vrms -20 Power dissipation Cross talk C.T. (dB) 0 2 30 100 300 1k 3k 10 k 30 k 0 0 100 k 2 4 6 Output power Signal source resistance Rg (9) 160 ICCQ (mA) RL = 8 W 16 14 12 16 Pout (W) VCC = 20 V Vin = 0 140 120 8 6 4 60 40 20 2 0 8 80 12 16 20 24 28 0 -40 32 -20 0 (V) (%) VCC = 20 V Rg = 10 kW 0.6 Total harmonic distortion 0.5 0.4 0.3 0.2 0.1 0 -40 -20 0 20 40 40 60 80 100 80 100 THD – Ta 10 THD 0.7 20 Ambient temperature Ta (°C) Vno – Ta (mVrms) 14 100 10 0.8 Vno 12 ICCQ – Ta f = 1 kHz Supply voltage VCC Output noise voltage 10 180 Quiescent current Maximum power dissipation PD (max) (W) PD MAX – VCC 20 18 8 60 80 5 3 1 0.5 0.3 0.1 0.05 0.03 0.01 -40 100 Ambient temperature Ta (°C) VCC = 20 V RL = 8 W f = 1 kHz Pout = 2 W Dual -20 0 20 40 60 Ambient temperature Ta (°C) 8 2002-02-13 TA8256BH Allowable power dissipation PD MAX (W) PD MAX – Ta 30 1: Infinite heat sink 1 2: 4.1°C/W heat sink 25 3: 9.5°C/W heat sink 20 2 15 3 10 5 0 0 25 50 75 100 125 150 175 200 Ambient temperature Ta (°C) 9 2002-02-13 TA8256BH Package Dimensions Weight: 4.04 g (typ.) 10 2002-02-13 TA8256BH RESTRICTIONS ON PRODUCT USE 000707EBF · 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. · This product generates heat during normal operation. However, substandard performance or malfunction may cause the product and its peripherals to reach abnormally high temperatures. The product is often the final stage (the external output stage) of a circuit. Substandard performance or malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the product. · 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. 11 2002-02-13