NCP1236 Datasheet - ON Semiconductor

NCP1236 - Fixed Frequency Controller

Pin No Pin Name Function 1 LATCH Latch *Off Input 2 FB 3 CS Feedback Current Sense 4 GND 5 DRV 6 VCC Drive output VCC input Pin Description Pull the pin up or down to latch *off the controller.

An internal current source allows the direct connection of an NTC for over

DATA SHEET www.onsemi.com Fixed Frequency Current Mode Controller for Flyback Converters NCP1236 The NCP1236 is a new fixed frequency current mode controller featuring Dynamic Self Supply (DSS).

This device is pin to pin compatible with the previous NCP12xx families.

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

NCP1236 Features

* increases safety level of the final application. Finally, due to a careful design, the precision of critical parameters is well controlled over the entire temperature range (

* 40C to +125C). MARKING DIAGRAM SOIC

* 7 CASE 751U 8 36Xff ALYW G 1 36Xff = Specific Device Code X = A, B

NCP1236_ONSemiconductor.pdf