Daewoo DVN-14F6N Service Manual page 58

IU01 (BA7790LS)
1. FUNCTION
(1) Circuit essential for a standard sound signal processing system as a PB AMP, REC AMP, ALC circuit, EQ selecting
switch and high voltage head switch have been intergrated onto a single 1 chip.
(2) Built-in LINE/TUNER INPUT selecting switch.
(3) Built-in summary 3 mode EQ switch and it can be obtained EQ carateristics of each mode.
(4) PB AMP is low noise and high performance.
(5) Built-in ALC circuit with variable ALC level for setting.
(6) No shock noise or ALC attack noise is generated when power source is turned ON or the mode is changed by means
of a ALC loop outside mute system.
2. Absolute Maximum Ratings (Ta = 25°C)
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
°ÿ Derate 4.0mW/°C for the operating above Ta = 25°C
3. Recommended Operational Conditions (Ta = 25°C)
Parameter
Power supply voltage
4. Pin Opertion
PIN MODE STOP
1
2 4.6
3
4
5 11.2
6 4.7
7 11.4
8 4.7
9
10 4.7
11 0.6
12 5.3
13 4.6
14 0.6
15 5.4
16 5.3
17
18 5.3
19 5.4
20
21 5.4
22 5.4
23
24 0.5
AUDIO IC BA7790LS
REC
0 0
4.6
0 0
0 0
11.2
4.7
11.4
4.7
0 0
4.7
0.6
5.3
4.6
0.6
5.4
5.3
0 0
5.3
5.4
0 0
5.4
5.4
0 0
5.2
Symbol
Vcc
Pd
Topr
Tstg
Symbol
Vcc
PLAY REW/FWD
0 0
4.6 4.6
0 0
0 0
11.2 11.2
4.7 4.7
11.4 11.4
4.7 4.7
3.8 0
4.7 4.7
5.2 0.6
5.3 5.3
4.6 4.6
0 0.5
5.3 5.4
5.3 5.3
0 0
5.3 5.3
5.3 5.3
0 0
5.3 5.4
5.3 5.4
0 1
0.5 0.5
55
Limits
13
400
-10~+65
-55~+125
Range
7.5~12.5
REV/FF PAUSE
0 0
4.6 4.6
0 0
0 0
11.2 11.2
4.7 4.7
11.4 11.4
4.7 4.7
3.7 0
4.7 4.7
5.2 0.6
5.3 5.3
4.6 4.6
0 0.5
5.3 5.4
5.3 5.3
5 0
5.3 5.3
5.4 5.4
0 0
5.4 5.4
5.4 5.3
0 0
0 0.5
Unit
V
mW
°C
°C
Unit
V
STILL
0
4.6
0
0
11.2
4.7
11.4
4.7
0
4.7
5.2
5.3
4.6
0
5.4
5.3
5
5.3
5.4
0
5.4
5.3
0
0.5