Specifications

Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 104 DPTV585 AA9.
9.7.2 Diagram E1, MC44603A (IC7302)
Figure 9-47 Internal Block Diagram and Pin Configuration
1 16
15
14
13
12
11
10
9
2
3
4
5
6
7
8
(Top View)
V
CC
V
C
Output
R
ref
Sync Input
PIN CONNECTIONS
Gnd
Foldback Input
Overvoltage
Protection (OVP)
Current Sense Input
Demag Detection
R
Frequency
Standby
Voltage Feedback
Input
Error Amp Output
R
Power Standby
Soft–Start/D
max
/
Voltage Mode
C
T
S
R
F Stby
R
ref
R
F Stby
V
ref
15 16
Reference
Block
V
ref
I
ref
+
V
CC
V
CC
1
14.5 V/7.5 V
V
aux
18.0 V
To Powe
r
Transforme
V
C
2
Output
3
Gnd
4
OVP
6
Current
Sense Input
7
V
CC
V
ref
V
OVP
Out
2.0
µ s
Delay
V
ref
5.0
µ s
Delay
+
2.5 V
R
OVP
11.6 k
2.0 k
V
CC
+
9.0 V
SS/D
max
/VM
2.4 V
R
SS
C
SS
11
1.0 V
Demag
Detect
8
Sync
Input
9
V
ref
+
+
+
65 mV
3.7 V
1.0 V
0.4 I
ref
C
T
10
R
Pwr Stby
12
Feed–
back
14
Compen–
sation
13
Foldback
Input
5
1.6 V
3.6 V
+
C
T
0.7 V
V
Demag Out
Synchro
V
OSC prot
0.4 I
ref
V
ref
V
ref
V
ref
V
ref
V
ref
0.4 I
ref
0.6 I
ref
0.8 I
ref
0.25
I
F Stby
0.2 I
ref
I
Discharge
I
Discharge/2
Current Mirror X2
0.4 I
ref
V
ref
2R
V
CC
1.0 mA
Error Amplifier
R
Q
S
R
Q
S
R
Q
S
R
Q
= Sink only
= Positive True Logic
+
2.5 V
Thermal
Shutdown
I
F Stby
UVLO2
V
OSC
+
1.6 V
UVLO1
5.0 mA
Negative
Active
Clamp
F_15120_045.eps
120805