NCP1251 Datasheet Current-Mode PWM Controller

Manufacturer: onsemi

NCP1251 current-mode pwm controller by onsemi - Datasheet Preview

Datasheet Details

Part number	NCP1251
Manufacturer	onsemi
File Size	426.87 KB
Description	Current-Mode PWM Controller
Datasheet	NCP1251 Datasheet

Overview

DATA SHEET www.onsemi.com Current-Mode PWM Controller for Off-line Power Supplies NCP1251 The NCP1251 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP−6 package.

With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control.

When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz.

Key Features

Fixed.
Frequency 65 or 100 kHz Current.
Mode Control Operation.
Internal and Adjustable Over Power Protection (OPP) Circuit.
Frequency Foldback Down to 26 kHz and Skip.
Cycle in Light Load Conditions.
Internal Ramp Compensation.
Internal Fixed 4 ms Soft.
Start.
100 ms Timer.
Based Auto.
Recovery Short.
Circuit Protection.
Frequency Jittering in Normal and Frequency Foldback Modes.
Option for Auto.
Re.

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