Ic Block Diagram - Philips AX2300 Service Manual

IC BLOCK DIAGRAM

U1: MM1538XQ
RCHG
AMUTE 34
EMP
35
HVcc
36
PSW
37
CLK
38
CLK
START
39
40
OFF
41 TSD
CHGVcc
42
SEL
43
PREGND
PWMFIL 44
BSEN
OUTIR OUT1F OUT2R OUT2F POWGND OUT3F
33 32 31 30
BTL
MAXIMUM
DETECTION
1 2 3 4
BATT RESET DEAD
4-2
OUT3R OUT4F
29 28 27 26
BTL BTL BTL
TSD
OVER-VOLTAGE
TRIANGLE WAVE
5 6 7 8
SW EO EI SPRT
OUT4R BRAKE1
25 24 23
BRAKE1
22 IN1
21 MUTE2
20 IN2
V
/
19 MUTE34
I
V
/
18 IN4
I
V
/
17 IN3
I
V
/
16 Vref
I
15
VSYS2
PRE-DRIVER POWER SUPPLY
14
OP+
13
OP
12 VSYS1
9 10 11
C N.C. OP-
T
OUT