Power Board - Philips HTS3011/98 Service Manual

7 - 1

POWER BOARD

TABLE OF CONTENTS
Internal IC Diagram ........................................................................... 7-1
Circuit Diagram .................................................................................. 7-2
PCB Layout Top View ....................................................................... 7-3
PCB Layout Bottom View .................................................................. 7-4
INTERNAL IC DIAGRAM - AP3843GMTR
7
VCC
34V
5
GND
2.50V
VREF
GOOD
LOGIC
4
R /C
OSC
T T
ERROR
AMP
2R
+
2
FB
-
1
COMP
R
CS 3
INTERNAL IC DIAGRAM - AZ431
CATHODE
REF
REF
V
7 - 1
UVLO
5V
S/R
REP
INTERNAL
BIAS
OVER TEMP
PROTECT
S Q
Q
R
PWM
1V
LATCH
CURRENT
SENSE
COMPARATOR
+
-
ANODE
8
REF
6
OUTPUT