Pin Connections - Philips Colour Television Service Manual

EN 104 9. DPTV585 AA
9.7.2 Diagram E1, MC44603A (IC7302)

PIN CONNECTIONS

V CC
V C
Output
Gnd
Foldback Input
Overvoltage
Protection (OVP)
Current Sense Input
Demag Detection
Negative
Q
Active
Clamp
Demag
Detect
8
+
65 mV
3.7 V
Sync
Input
V ref
9
0.4 I ref
0.7 V
1.0 V
1.6 V
C T
10
+
C T 3.6 V
0.4 I ref
V ref V ref
0.4 I ref
R Pwr Stby
12
V CC
Feed–
1.0 mA
back
14
+
Compen– 2.5 V
sation
13
5
Foldback
Input
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
1 16 R ref
R Frequency
2 15
Standby
Voltage Feedback
3 14
Input
4 13 Error Amp Output
5 12 R Power Standby
Soft–Start/D max /
6 11
Voltage Mode
7 10 C T
8 9 Sync Input
(Top View)
R
S
V Demag Out
+
Synchro
+
V OSC prot
R
Q
S
R
Q
S
I Discharge
V ref V ref
0.25
0.6 I ref 0.8 I ref
I F Stby
I Discharge/2
Current Mirror X2
2R
Error Amplifier
1.0 V
= Sink only
= Positive True Logic
Figure 9-47 Internal Block Diagram and Pin Configuration
R F Stby R ref
R F Stby 15 16 V ref
Reference
Block
V ref I ref I F Stby
V OSC
S
Q
R
Thermal
Shutdown
V ref
V ref
0.2 I ref
0.4 I ref
5.0 µs
+
+ 2.5 V
1.6 V
2.4 V 5.0 mA
11 SS/D max /VM
R SS C SS
UVLO2
V CC
1
18.0 V
+
V CC
14.5 V/7.5 V
V C
2
Output
3
4
V OVP
2.0 µs
Out
Gnd
Delay
V ref
V CC
V ref
11.6 k
OVP
Delay
6
2.0 k
R OVP
Current
Sense Input
7
UVLO1
V CC
+
9.0 V
F_15120_045.eps
V aux
To Power
Transforme
120805