The ISL6752 is a high-performance, low-pin count alternative Zero-Voltage Switching (ZVS) full-bridge PWM controller. Like Intersil’s ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETs are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and light load performance with less complexity in a lower pin count package. The ISL6752 features complemented PWM outputs for Synchronous Rectifier (SR) control. The complemented outputs may be dynamically advanced or delayed relative to the PWM outputs using an external control voltage. This advanced BiCMOS design features precision dead time and resonant delay control and an oscillator adjustable to 2MHz operating frequency. Additionally, multi-pulse suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.

Features

  • Adjustable resonant delay for ZVS operation
  • Synchronous rectifier control outputs with adjustable delay/advance
  • Current-mode control
  • 3% current limit threshold
  • Adjustable dead time control
  • 175μA start-up current
  • Supply UVLO
  • Adjustable oscillator frequency up to 2MHz
  • Internal over-temperature protection
  • Buffered oscillator sawtooth output
  • Fast current sense to output delay
  • Adjustable cycle-by-cycle peak current limit
  • 70ns leading edge blanking
  • Multi-pulse suppression
  • Pb-free (RoHS compliant)

Applications

  • ZVS Full-Bridge 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
ISL6752 Datasheet Datasheet PDF 1.02 MB
User Guides & Manuals
ISL6752EVAL1Z User Guide Manual PDF 2.28 MB
AN1603: ISL6752/54EVAL1Z User Guide Manual PDF 3.45 MB
Application Notes & White Papers
AN1262: Designing with the ISL6752, ISL6753 ZVS Full-Bridge Controllers Application Note PDF 581 KB
AN1246: Techniques To Improve ZVS Full-bridge Performance Application Note PDF 725 KB
AN1619: Designing with ISL6752DBEVAL1Z and ISL6754DBEVAL1Z Control Cards Application Note PDF 1.49 MB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
PCNs & PDNs
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
Other
ISL6752 iSim:PE Model Schematic SXSCH 618 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

Boards & Kits

Part Number Title Type Company
ISL6752/54EVAL1Z ZVS Full-Bridge PWM Controller Evaluation Board Evaluation Renesas
ISL6752DBEVAL1Z ZVS Full-Bridge PWM Controller Evaluation Board Evaluation Renesas
ISL6754DBEVAL1Z ZVS Full-Bridge PWM Controller Evaluation Board Evaluation Renesas