Overview

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.

ISL6742 Functional Diagram
ISL6742 Functional Diagram
  • 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

  • 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

= Featured Documentation
Type Title Date
Datasheet
ISL6742 Datasheet
PDF 990 KB 简体中文
Product Change Notice
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida
PDF 294 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
Application Note
AN1245: iSim ISL6742 Virtual Evaluation Platform
PDF 1.05 MB
5 items

Design & Development

Software & Tools
iSim:PE Offline Simulation Tool
iSim 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
ISL6742 Double-Ended PWM Controller iSim:PE ModelISL6742 High Voltage Unregulated Full-bridge iSim:PE Model
 Simulator Renesas
1 item

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

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    Price (USD) | 1ku
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    Part Number
    ISL6742AAZA
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    Samples Available
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    		QSOP Tube 2 Get Samples,
    ISL6742AAZA-T
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    		QSOP Reel 2
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