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INTERNAL BLOCK DIAGRAM OF ICs
I LA1837




I KA3082




I KIA6289N




- 28 -
I KA8301




I KIA7805 P/PI ~ KIA7824P/PI




- 29 -
I LC7273M




I TDA7440D

MUXOUTL INL TREBLE(L) BIN(L) BOUT(L)
4 8 9 18 14 15
L-IN1
100K RB
5
L-IN2
100K
SPKR ATT 27
6 G VOLUME TREBLE BASS LOUT
L-IN3 LEFT
100K

7
L-IN4
100K 21
0/30dB 2 SCL
2dB STEP I CBUS DECODER + LATCHES 22
3 SDA
R-IN1 20
DIG_GND
100K
2
R-IN2
100K SPKR ATT 26
G VOLUME TREBLE BASS ROUT
RIGHT
1
R-IN3 VREF
100K
24
28 VS
R-IN4 INPUT MULTIPLEXER SUPPLY 25
RB AGND
100K +GAIN

10 11 19 12 13 23
MUXOUTR INR TREBLE(R) BIN(R) BOUT(R) CREF D98AU883




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I STK411-230E




- 31 -
I TDA7296


BOOTSTRAP




BOOTSTRAP




IN+

OUTPUT
IN+




BJPQLAR MQS GAIN & MQS OUTPUT STAGE SHORT CIRCUIT
TRANSCONDUCTANCE LEVEL SHIFTING PROTECTION
INPUT STAGE STAGE




ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit
Vss Supply Voltage