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Intersil ISL78226

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Intersil ISL78226 - industry’s first 6-phase bidirectional PWM controller enables rapid adoption of 48V hybrid powertrains

Intersil’s ISL78226 bidirectional controller is designed to perform buck and boost power conversions between 12V and 48V automotive buses. A single automotive-grade ISL78226 delivers up to 3.75kW at greater than 95% conversion efficiency, and is able to interleave in a modular master/slave architecture to deliver higher power. ISL78226 also features:

  • Average phase-to-phase current balancing, and average current output
  • Cycle-by-cycle peak current limiting, negative current limiting, and digitally programmable average current limit
  • Dual-output flyback controller and 200mA adjustable output linear regulator

The ISL78226EVAL1Z Evaluation Board  Evaluation Board is available from Avnet Silica.

Features & benefits

  • Intersil ISL78226 Evaluation Board6-phase bidirectional synchronous 12V to 48V controller 
  • Master/slave architecture supports up to 4 ICs in parallel 
  • Voltage and current regulation 
  • Phase dropping facilitated with companion FET driver 
  • Supply and clock redundancy for functional safety 
  • Digitally programmable average current limit 
  • Analog/digital control of output voltage 
  • PMBus for status monitoring and fault response control 
  • Selectable phase dropping and diode emulation for light-load efficiency improvement 
  • Comprehensive protection with selectable hiccup or latch-off fault responses 
  • Digitally programmable warning and fault thresholds 
  • 200mA adjustable output linear regulator 
  • 10mmx10mm 64-pin TQFP with exposed pad thermal interface
  • AEC-Q100 Grade-1 qualified for operation from -40°C to +125°C


  • Automotive bidirectional DC/DC converter

Block diagram

Intersil ISL78226 Block Diagram

Intersil ISL78226 teaser image

Intersil ISL78226 Related Documents

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