Philips HTS5540 - Page 25

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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
+
-
V
REF
REF
CATHODE
ANODE
INTERNAL IC DIAGRAM - AZ431
INTERNAL IC DIAGRAM - AZ7500BP
Oscillator
0.12V
5
6
CT
RT
4
DTC
1IN +
1IN -
2IN +
2IN -
1
2
16
15
Error Amplifier 1
Error Amplifier 2
Dead-Time Control
Comparator
D
CK
3
FEEDBACK
PWM
Comparator
Pulse-Steering
Flip-Flop
OUTPUT CTRL
13
Reference
Regulator
Q1
Q2
12
10
11
9
8
C1
E1
C2
E2
V
CC
REF
GND
14
7
0.7mA
+
+
+
+