NCP1351
NCP1351
+
V OUT
+
LATCH
85-265VAC
*OPP
1
2
3
4
8
7
6
5
+
GND
*Optional
Figure 1. Typical Application Circuit
PIN FUNCTION DESCRIPTION
Pin N °
1
2
3
4
5
6
7
8
Pin Name
FB
Ct
CS
GND
DRV
V CC
Latch
Timer
Function
Feedback Input
Oscillator Frequency
Current Sense Input
Driver Output
Supply Input
Latchoff Input
Fault Timer Capacitor
Pin Description
Injecting Current in this Pin Reduces Frequency
A capacitor sets the maximum switching frequency at no feedback current
Senses the Primary Current
Driving Pulses to the Power MOSFET
Supplies the controller up to 28 V
A positive voltage above V LATCH fully latches off the controller
Sets the time duration before fault validation
OVERCURRENT PROTECTION ON NCP1351 VERSIONS:
NCP1351
Auto-recovery
Latched
Dual level
A
B
x
x
C
D
x
http://onsemi.com
2
x
x
x
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