80V/1.25A Peak High-Frequency Half Bridge Driver with TTL Logic Inputs Evaluation Board


The ISL6700 general purpose design tool, ISL6700EVAL1Z, is a very simple evaluation board which can help the user rapidly construct an isolated DC/DC converter in several configurations. The board consists of the Intersil ISL6700 Half-Bridge Driver IC, two Intersil IRFR120 MOSFETs, a bootstrap diode, a bootstrap capacitor and two input voltage decoupling capacitors. The ISL6700 can operate at frequencies in excess of 500kHz and has typical propagation delay times of 30ns. It has 1.25A output drive capability and can switch an IRFR120 load with rise and fall times of less than 20ns.

Key Features

  • Three Application Configurations:
    • Two-Switch Forward Converter
    • Half-Bridge Converter
    • Active-Clamp Forward Converter
  • Drives 2 N-Channel MOSFETs in Half-Bridge Configuration
  • Space Saving SO8 and Low RC-S QFN Packages
  • Phase Supply Max Voltage to 80VDC
  • Bootstrap Supply Max Voltage to 96VDC
  • Drives 1000pF Load with Rise and Fall Times Typ. 15ns
  • TTL/CMOS Compatible Input Thresholds
  • Independent Inputs for Non-Half-Bridge Topologies
  • No Start-Up Problems
  • Low Power Consumption
  • Wide Supply Range
  • Supply Undervoltage Protection


  • Telecom/Datacom Power Supplies
  • Half-Bridge Converters
  • Two-Switch Forward Converters
  • Active Clamp Forward Converters

ISL6700EVAL1Z Half Bridge Driver Eval Board Schematic

ISL6700EVAL1Z Half Bridge Driver Eval Board Schematic

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