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NCP1236BD100R2G Datasheet(PDF) 2 Page - ON Semiconductor

Part # NCP1236BD100R2G
Description  Fixed Frequency Current Mode Controller for Flyback Converters
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1236BD100R2G Datasheet(HTML) 2 Page - ON Semiconductor

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NCP1236
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TYPICAL APPLICATION EXAMPLE
VOUT
VIN
(dc)
NCP1236
LATCH
FB
CS
GND
HV
VCC
DRV
Figure 1. Flyback Converter Application Using the NCP1236
OPTIONS
Part
Option
Frequency
OCP Fault
Fault Timer
Autorecovery
Timer
NCP1236
A
65 kHz
Latched
128 ms
1 s
A
100 kHz
Latched
128 ms
1 s
B
65 kHz
Autorecovery
128 ms
1 s
B
100 kHz
Autorecovery
128 ms
1 s
C
65 kHz
Latched
32 ms
1.5 s
C
100 kHz
Latched
32 ms
1.5 s
D
65 kHz
Autorecovery
32 ms
1.5 s
D
100 kHz
Autorecovery
32 ms
1.5 s
PIN FUNCTION DESCRIPTION
Pin No
Pin Name
Function
Pin Description
1
LATCH
Latch−Off Input
Pull the pin up or down to latch−off the controller. An internal current source
allows the direct connection of an NTC for over temperature detection
2
FB
Feedback
An optocoupler collector to ground controls the output regulation.
3
CS
Current Sense
This Input senses the Primary Current for current−mode operation, and Offers
an overpower compensation adjustment.
4
GND
IC Ground
5
DRV
Drive output
Drives external MOSFET
6
VCC
VCC input
This supply pin accepts up to 28 Vdc, with overvoltage detection
8
HV
High−voltage pin
Connects to the bulk capacitor or the rectified AC line to perform the functions
of Start−up Current Source, Dynamic Self−Supply and brown−out detection


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