L4990 - PRIMARY CONTROLLER

Product Overview

STMicroelectronics

Datasheet Details

Part number	L4990
Manufacturer	STMicroelectronics
File Size	322.28 KB
Description	PRIMARY CONTROLLER
Datasheet	L4990 Datasheet
Additional preview pages of the L4990 datasheet.

Product details

Description

This primary controller I.C., developed in BCD60II technology, has been designed to implement off BLOCK DIAGRAM SYNC 1 RCT 2 TIMING 25V DC-LIM 15 MULTIPOWER BCD TECHNOLOGY DIP16 SO16W ORDERING NUMBERS: L4990/L4990A(DIP16) L4990D/L4990AD (SO16W) line or DC-DC power supply applications using a fixed frequency current mode control.Based on a standard current mode PWM controller this device includes some

Features

as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start intervention. VCC 8 VREF 4 3 DC 14 DIS 2.5V + + T DIS Vref + 16V/10V - PWM UVLO 9 VC 13V.

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Published: Mar 22, 2005 |