Overview

Description

The ISL6753 is a high-performance, low-pin-count alternative, zero-voltage switching (ZVS) full-bridge PWM controller. Like the 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 lightload performance with less complexity in a lower pin count package. This advanced BiCMOS design features low operating current, adjustable oscillator frequency up to 2MHz, adjustable soft-start, internal over temperature protection, precision deadtime and resonant delay control, and short propagation delays. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.

Features

  • Adjustable Resonant Delay for ZVS Operation
  • Voltage- or Current-Mode Operation
  • 3% Current Limit Threshold
  • 175µA Startup Current
  • Supply UVLO
  • Adjustable Deadtime Control
  • Adjustable Soft-Start
  • Adjustable Oscillator Frequency Up to 2MHz
  • Tight Tolerance Error Amplifier Reference Over Line, Load, and Temperature
  • 5MHz GBWP Error Amplifier
  • Adjustable Cycle-by-Cycle Peak Current Limit
  • Fast Current Sense to Output Delay
  • 70ns Leading Edge Blanking
  • Multi-Pulse Suppression
  • Buffered Oscillator Sawtooth Output
  • Internal Over Temperature Protection
  • Pb-Free Plus Anneal Available and ELV, WEEE, RoHS Compliant

Applications

Applications

  • ZVS Full-Bridge Converters
  • Telecom and Datacom Power
  • Wireless Base Station Power
  • File Server Power
  • Industrial Power Systems

Documentation

Title Type Date
PDF748 KB
Datasheet
PDF581 KB
Application Note
PDF725 KB
Application Note
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF398 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

Support