Datasheet4U Logo Datasheet4U.com

L4990 - PRIMARY CONTROLLER

General 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 fi

Key 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.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
L4937 Dual Low Drop Fixed Output Linear Regulator ETC
L493EC T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493GC T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493GT T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC
L493IT T-1 3/4 (5mm) CYLINDRICAL LED LAMPS ETC

Other Datasheets by STMicroelectronics

Part Number Description
L4990A PRIMARY CONTROLLER
L4992 TRIPLE OUTPUT POWER SUPPLY CONTROLLER
L4993 Low drop voltage regulator
L4995 500mA low drop voltage regulator
L4901A DUAL 5V REGULATOR WITH RESET

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
® L4990 L4990A PRIMARY CONTROLLER CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A) FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION PROGRAMMABLE DUTY CYCLE 100% AND 50% MAXIMUM DUTY CYCLE LIMIT PROGRAMMABLE SOFT START PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY PWM UVLO WITH HYSTERESIS IN/OUT SYNCHRONIZATION DISABLE LATCHED INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE PACKAGE: DIP16 AND SO16W DESCRIPTION This primary controller I.C.