TA7738中文资料
UTC TA7738P LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R110-009,A
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)
BLOCK DIAGRAM
Buffer
Output Buffer NF
GND
Power Input Power NF
Power
GND
Power Output
Pre Output
Pre NF
Pre Input
Pre GND
Filter 2
Filter 1Vcc
Boot Strap
ALC Input
ABSOLUTE MAXIMUN RATING (Ta=25°C)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage VCC 14V Output Current I O(peak) 1.5A Power Dissipation*PD 1200mW Operating Temperature
TOPR
-25~75°C Storage Temperature TSTG
-55~150
°C
*Note: De-rated above Ta=25°C in proportion of 9.6mW/°C
UTC TA7738P LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R110-009,A
ELECTRONIC CHARACTERISTICS (Ta=25°C, V CC =6V, f=1kHZ, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX
UNIT
Total
Quiescent Current I CCQ1VCC=3.5V 7.5mA
I CCQ2
VCC=6V
11
35
Pre-amplifier
Open Loop Voltage Gain G VO155
70dB Closed Loop Voltage Gain G V140dB Maximum Output Voltage V OUT1THD<1%0.7Vrms Input Impedance R IN1VOUT=0.5Vrms
30k ?Equivalent Input Noise Voltage
V NI
Rg=0
1.4
2.5
μ?Vrms
Pre-amplifier + Buffer amplifier Closed Loop Voltage Gain G V2Pre-AMP GV=40dB Buff-AMP GV=20dB
60
dB
Maximum Output Voltage V OUT2THD=3% 1.5
1.7Vrms Equivalent Input Noise Voltage V NO2
Rg=0, GV2=60dB
1.2
2.5
mVrms
ALC Effect A LC1VIN= -60dBm~ -20dBm
2dB ALC Range A LC2
THD<1%
60
dB
Power amplifier
Open Loop Voltage Gain G VO160
70dB Closed Loop Voltage Gain G V140dB Maximum Output Power P OM RL=4?,THD=10%0.80.96W
VCC=9V,RL ?,THD=10%
2Output Noise Voltage
V NO3
Rg=0, GV=40dB
0.3
1
mVrms
UTC TA7738P LINEAR INTEGRATED CIRCUIT TEST CIRCUIT
SWITCH MODE
TEST ITEM SW1SW2SW3SW4SW5SW6 GVO111ON OFF OFF OFF
GV111OFF OFF OFF OFF
VOUT111OFF OFF OFF OFF
GV213OFF OFF OFF OFF
VOUT213OFF OFF OFF OFF
VNO213OFF OFF ON OFF
ALC12OFF OFF OFF OFF
GVO321OFF ON OFF OFF
GV321OFF OFF OFF OFF
PO21OFF OFF OFF OFF
VNO321OFF OFF OFF ON UTC UNISONIC TECHNOLOGIES CO., LTD.3
QW-R110-009,A
UTC TA7738P LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R110-009,A
TYPICAL PERFORMANCE CHARACTERISTICS
1
THD vs Output Power 1
1P0(W)
THD vs Output Power 2
110f(Hz)Po(W)
Vcc(V)
Double Channel Mode Output Power
vs Supply Voltage
THD vs Output Frequency
PO(W)