UTC TA7738P LINEAR INTEGRATED CIRCUIT AMPLIFIER SYSTEM FOR CASSETTE TAPE RECORDER DESCRIPTION The UTC TA7738P is an amplifier system, designed for a stereo set and a radio cassette tape recorder. FEATURES *Recorder play balk for pre-amplifier *Buffer amplifier( recorder amplifier) *Power amplifier *Wide operating voltage range( 3.5V to 9V) DIP-16 BLOCK DIAGRAM Pre GND Pre Input Pre NF Pre Output Filter 2 16 15 14 13 12 Filter 1 11 Vcc Boot Strap 10 9 Filter Pre AMP Buffer AMP Power AMP ALC 1 ALC Input 2 3 Buffer Buffer NF Output 4 GND ABSOLUTE MAXIMUN RATING(Ta=25°C) PARAMETER SYMBOL 5 6 7 Power Power Power NF Input GND VALUE 8 Power Output UNIT Supply Voltage VCC 14 V Output Current I O(peak) 1.5 A PD 1200 mW TOPR -25~75 °C -55~150 °C Power Dissipation* Operating Temperature Storage Temperature TSTG *Note: De-rated above Ta=25°C in proportion of 9.6mW/°C UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R110-009,A UTC TA7738P LINEAR INTEGRATED CIRCUIT ELECTRONIC CHARACTERISTICS(Ta=25°C, VCC=6V, f=1kHZ, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Total Quiescent Current ICCQ1 VCC=3.5V 7.5 ICCQ2 VCC=6V 11 mA 35 Pre-amplifier Open Loop Voltage Gain GVO1 Closed Loop Voltage Gain GV1 55 70 Maximum Output Voltage VOUT1 THD<1% Input Impedance RIN1 VOUT=0.5Vrms 30 Equivalent Input Noise VNI Rg=0 1.4 Pre-AMP GV=40dB 60 dB 40 dB 0.7 Vrms kΩ µΩVrms 2.5 Voltage Pre-amplifier + Buffer amplifier Closed Loop Voltage Gain GV2 dB Buff-AMP GV=20dB Maximum Output Voltage VOUT2 THD=3% Equivalent Input Noise VNO2 Rg=0, GV2=60dB 1.5 1.7 ALC Effect ALC1 VIN= -60dBm~ -20dBm 2 dB ALC Range ALC2 THD<1% 60 dB 70 dB 40 dB 0.96 W 1.2 Vrms 2.5 mVrms Voltage Power amplifier Open Loop Voltage Gain GVO1 Closed Loop Voltage Gain GV1 Maximum Output Power POM Output Noise Voltage UTC VNO3 60 RL=4Ω,THD=10% 0.8 VCC=9V,RLΩ,THD=10% 2 Rg=0, GV=40dB 0.3 1 mVrms UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R110-009,A UTC TA7738P LINEAR INTEGRATED CIRCUIT TEST CIRCUIT Pre Output 0.01 µF Inter Lock 10kΩ 1,2=off, 3=on SW3 220Ω SW1-3 22 µF 220 µF Vcc 2 560pF 3 SW5 16 15 14 13 12 11 10 9 Filter SW6 Pre AMP SG Buffer AMP 47 µF Rg 600Ω 330 µF 1 SW1 100 µF 22kΩ 4.7 µF 3.3kΩ Power AMP ALC 1 2 3 4 5 6 #560pF 390kΩ SW4 47 µF 5.6kΩ 1000µF/ 10V 2 3 0.068 µF 4.7 µF Power Output RL SW2 0.02 µF 1N60 1uF 220Ω Buffer Output 1 SWITCH MODE TEST ITEM SW1 8 #560pF 1kΩ 1N60 47 µF 7 #6.2kΩ 10 µF 1kΩ 51kΩ 1000pF# use in measuring the output noise voltage SW2 SW3 SW4 SW5 SW6 GVO1 1 1 ON OFF OFF OFF GV1 1 1 OFF OFF OFF OFF VOUT1 1 1 OFF OFF OFF OFF GV2 1 3 OFF OFF OFF OFF VOUT2 1 3 OFF OFF OFF OFF VNO2 1 3 OFF OFF ON OFF ALC 1 2 OFF OFF OFF OFF GVO3 2 1 OFF ON OFF OFF GV3 2 1 OFF OFF OFF OFF PO 2 1 OFF OFF OFF OFF VNO3 2 1 OFF OFF OFF ON UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R110-009,A UTC TA7738P LINEAR INTEGRATED CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS THD vs Output Power 1 THD vs Output Power 2 10 1 d(%) d(%) Vcc=6V RL=8Ω Vcc=6V RL=40Ω 1 0.1 0 0.2 0.4 0.6 1 0.8 1.2 0 PO(W) 0.2 0.4 0.6 0.8 1.0 1.2 P0(W) Double Channel Mode Output Power vs Supply Voltage THD vs Output Frequency 8 10 Po(W) d(%) 6 Vcc=9V RL=9Ω Po=1.5W f=1kHz, d=10% RL=4Ω 4 1 2 0.1 10 UTC 0 100 1k 10k f(Hz) 100k 0 4 8 12 Vcc(V) UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R110-009,A