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GRUNDIG Service
Multiplier
Input
+5 V
9 K
Control
1/4
Input
+5 V
50 A
Brown±out
Detect
1.25 V
+5 V
60 A
Current
Sense
C
T
MC34262
MC33262
Zero Current Detector
2.5V
Reference
Multiplier ,
Latch,
PWM,
Timer ,
&
Logic
Multiplier
3
6
GND
Compensation
NCP1212
+5 V
10 A
V
SS
-
+
-
-
+
+
-
Shutdown
1 V
+
Brown±out
Q
200 ns
LEB
Soft±Start &
Reset
Max. Duty Select
OSC
Block
5
Undervoltage
Lockout
8
7
4
Overvoltage
Comparator
+
1.08 V
ref
Error Amp
+
V
ref
1
Quickstart
2
Skip_Cycle
Shutdown
Shutdown
Overload
Overload
Detect
Overload Detect
Enable
Set
Skip_Cycle
2 - 42
Zero Current
Detect Input
V
CC
Drive Output
Current Sense
Input
Voltage
Feedback
Input
Shutdown
OVP (25 V)
V
CC
UVLO (10 V)
Management
Totem Pole
F/F
Drive
Q
R
Q
S
Shutdown
Q
Chassis PE
Soft±Start/
D
max
V
CC
Output
Gnd
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