NCP1124 Datasheet - ON Semiconductor

NCP1124 - High-Voltage Switcher

Pin No.

Pin Name Pin Description 1 VCC This pin is connected to an external auxiliary voltage and supplies the controller.

When above a certain level, the part fully latches off.

2 FB Feedback input.

Hooking an optocoupler collector to this pin will allow regulation.

3 CS This pin monitors t

NCP1124, NCP1126, NCP1129 High Voltage Switcher for Offline Power Supplies The NCP112x products integrates a fixed frequency peak current mode controller with a low on resistance, 650 V MOSFET.

Available in a PDIP 7 package, the NCP112x offers a high level of integration, including soft start, frequency jittering, short circuit protection, thermal shutdown protection, frequency foldback mode and skip cycle to reduce power consumption in l

NCP1124 Features

* include: a timer to detect an overload or a short

* circuit event with auto

* recovery or latch protection, and a built

* in VCC overvoltage protection. The switcher also provides a jittered 65 kHz or 100 kHz switching frequency to improve the EMI. Features

* Built

NCP1124-ONSemiconductor.pdf