NCP1253 controller equivalent, current-mode pwm controller.
* Fixed−Frequency 65 kHz or 100 kHz Current−Mode Control
Operation
* Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load
Conditions
* Adjustable Ra.
* Ac−dc Converters for TVs, Set−top Boxes and Printers
* Offline Adapters for Notebooks and Netbooks
MARKING DI.
Pin No. Pin Name
1
GND
2
FB
Function −
Feedback pin
3
NC
Non−connected pin
4
CS
Current sense + ramp compensation
5
VCC
Supplies the controller
– protects the IC
6
DRV
Driver output
Description
The controller ground.
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