NCP1337 Datasheet - ON Semiconductor

NCP1337 PWM Current Mode Controller

Pin No. Symbol Function 1 BO Brown *out and external triggering 2 FB Sets the peak current setpoint 3 CS Current sense input and overpower compensation adjustment 4 GND IC ground 5 DRV Output driver 6 VCC IC supply 8 HV High *voltage pin Description

DATA SHEET www.onsemi.com PWM Current-Mode Controller for Free Running Quasi-Resonant Operation NCP1337 The NCP1337 combines a true current mode modulator and a demagnetization detector which ensures full Borderline/Critical Conduction Mode in any load/line conditions together with minimum drain voltage switching (Quasi Resonant operation). The transformer core reset detection is done internally, without using any external signal, due to the Soxyless concept. The frequency is internally.

NCP1337 Features

* an efficient protective circuitry which, in presence of an overcurrent condition, disables the output pulses and enters a safe burst mode, trying to restart. Once the default has gone, the device auto

* recovers. Also included is a bulk voltage monitoring function (known as brown

* out p

NCP1337_ONSemiconductor.pdf