NCP1237 Datasheet - ON Semiconductor

NCP1237 Fixed Frequency Current Mode Controller

Pin No Pin Name Function 1 LATCH Latch *off Input 2 FB 3 CS 4 GND 5 DRV 6 VCC 8 HV Feedback Current Sense * Drive Output VCC Input High *Voltage Pin Pin Description Pull the pin up or down to latch *off the controller. An internal current source allows the direct.

NCP1237 Fixed Frequency Current Mode Controller for Flyback Converters The NCP1237 is a new generation of the NCP12xx fixed frequency current mode controllers featuring Dynamic Self Supply (DSS), pin to pin compatible with the previous generation. The DSS function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during transients. Due to its proprietary .

NCP1237 Features

* a dual

* level timer

* based fault detection that controls the amount of transient peak power that the controller can deliver for a limited time. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where

NCP1237_ONSemiconductor.pdf