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 Vcc Boot Strap 11 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 1.2 1.7 Vrms ALC Effect ALC1 VIN= -60dBm~ -20dBm 2 dB ALC Range ALC2 THD<1% 60 dB 70 dB 40 dB 0.96 W 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 SW3 220Ω Inter Lock 10kΩ 1,2=off, 3=on 22 µF 0.01 µF SW1-3 Vcc 220 µF 2 560pF 3 Rg 600Ω SW5 16 15 14 13 12 11 10 9 Filter SW6 Pre AMP SG Buffer AMP Power AMP 47 µF 1 330 µF SW1 100 µF 22kΩ 4.7 µF 3.3kΩ ALC 1 2 3 4 5 6 #560pF 47 µF 5.6kΩ 2 3 0.02 µF 1uF 220Ω 0.068 µF 4.7 µF SW2 1 1N60 1000 µF/ 10V Power Output Buffer Output 1N60 47 µF SWITCH MODE TEST ITEM SW1 8 #560pF 1kΩ SW4 390kΩ 7 #6.2kΩ RL 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 100 1k 10k f(Hz) 100k 0 0 4 8 12 Vcc(V) UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R110-009,A UTC TA7738P LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R110-009,A