Overview

Description

The ISL6742 is a high-performance double-ended PWM controller with advanced synchronous rectifier control and current limit features. It is suitable for both current- and voltage-mode control methods. The ISL6742 includes complemented PWM outputs for Synchronous Rectifier (SR) control. The complemented outputs may be dynamically advanced or delayed relative to the main outputs using an external control voltage. Its advanced current sensing circuitry employs sample and hold methods to provide a precise average current signal. Suitable for average current limiting, a technique which virtually eliminates the current tail-out common to peak current limiting methods, it is also applicable to current sharing circuits and average current-mode control. This advanced BiCMOS design features an adjustable oscillator frequency up to 2MHz, internal over-temperature protection, precision dead time control, and short propagation delays. Additionally, multipulse suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.

Features

  • Synchronous rectifier control outputs with adjustable delay/advance
  • Adjustable average current signal
  • 3% Tolerance cycle-by-cycle peak current limit
  • Fast current sense to output delay
  • Adjustable oscillator frequency up to 2MHz
  • Adjustable dead time control
  • Voltage- or current-mode operation
  • Separate RAMP and CS inputs for voltage feed-forward or current-mode applications
  • Tight tolerance error amplifier reference over line, load, and temperature
  • 175µA start-up current
  • Supply UVLO
  • Adjustable soft-start
  • 70ns leading edge blanking
  • Multipulse suppression
  • Internal over-temperature protection
  • Pb-Free (RoHS compliant)

Applications

Applications

  • Half-Bridge, Full-Bridge, Interleaved Forward, and Push-Pull Converters
  • Telecom and Datacom Power
  • Wireless Base Station Power
  • File Server Power
  • Industrial Power Systems

Documentation

Title Type Date
PDF990 KB 简体中文
Datasheet
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF1.05 MB
Application Note
PDF294 KB
Product Change Notice

Design & Development

Software & Tools

Software & Tools

Title Type Company
iSim:PE Offline Simulation TooliSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.Downloads: Simulator Renesas

Models

Models

Title Type Date
Model - iSim
Model - iSim

Support