The ISL6744A is a low cost, primary side, double-ended controller intended for applications using full and half-bridge topologies for unregulated DC/DC converters. It is a voltage-mode PWM controller designed for half-bridge and full-bridge power supplies. It provides precise switching frequency control, adjustable soft-start, precise dead time control with dead times as low as 35ns, and overcurrent shutdown. The ISL6744A is identical to the ISL6744, but is optimized for higher noise environments. Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults.


  • Precision duty cycle and dead time control
  • 100μA start-up current
  • Adjustable delayed overcurrent shutdown and restart
  • Adjustable oscillator frequency up to 2MHz
  • 1A MOSFET gate drivers
  • Adjustable soft-start
  • Internal over-temperature protection
  • 35ns control to output propagation delay
  • Small size and minimal external component count
  • Input undervoltage protection
  • Pb-free (RoHS compliant)


  • Telecom and Datacom Isolated Power
  • DC Transformers
  • Bus Converters

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOICN Tube 980
Active SOICN Reel 2500
Active MSOP Tube 980
Active MSOP Reel 2500

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6744A Datasheet Datasheet PDF 1.10 MB
Application Notes & White Papers
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
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
PCN13012 - Alternate Test Site for the Listed Intersil Products - Carsem (CAS) Ipoh, Malaysia Product Change Notice PDF 74 KB
PCN12068 - SOIC w/ Copper Bond Wire @ ASECL as Alternate Assembly Site Product Change Notice PDF 108 KB
PA16061 - Introduce New T-type End Plug for n-SOIC rail (packing tube) Product Advisory PDF 106 KB