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

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

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QSOP Tube 980
Availability
Active QSOP Reel 2500
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL6742 Datasheet 简体中文 Datasheet PDF 990 KB
Application Notes & White Papers
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1245: iSim ISL6742 Virtual Evaluation Platform Application Note PDF 1.05 MB
PCNs & PDNs
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida Product Change Notice PDF 294 KB
Other
ISL6742 Double-Ended PWM Controller iSim:PE Model Schematic SXSCH 605 KB
ISL6742 High Voltage Unregulated Fullbridge iSim:PE Model Schematic SXSCH 457 KB

Software & Tool Pages

Title Type Description Company
iSim:PE Offline Simulation Tool Simulator 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. Renesas