Overview

The ISL78226 is a 6-phase, bidirectional, synchronous PWM controller designed to perform power conversion between 12V and 48V buses up to 3. 75kW at >95% conversion efficiency. One ISL78226 supports both Buck and Boost power conversion enabling a compact and robust design with minimum components. ISL78226 regulates both voltage and current to control power transfer from bus to bus. The multiphase architecture uses interleaved timing to support up to six parallel power stages per ISL78226. By interleaving the power stages, the ripple frequency is multiplied, reducing input and output ripple voltage and current. Lower ripple results in fewer input/output capacitors and therefore, lower component cost and smaller circuit implementation. The IC is designed to be interleaved in a master/slave architecture to be scaleable for higher power. Also integrated within the device is a dual-output Flyback controller that generates both a 12V supply for the power stage FET drivers as well as a 6V supply for the ISL78226 from either of the two buses. A 200mA auxiliary linear regulator is provided to supply a local microcontroller or interface devices. A PMBus interface provides system control and diagnostics to support functional safety requirements. This digital interface offers the system controller the ability to program operating modes, voltage and current limit warning, protection thresholds, individual fault response, and rapid fault condition detection.

  • 6-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
  • Average phase-to-phase current balancing
  • 2% current monitor gain accuracy from 0 to full load
  • Supply and clock redundancy for functional safety
  • Cycle-by-cycle peak current limiting
  • Cycle-by-cycle negative current limiting
  • 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
  • Dual-output Flyback controller
  • 200mA adjustable output linear regulator
  • 10mmx10mm 64 Ld TQFP with exposed pad thermal interface
  • AEC-Q100 Grade 1

Documentation

Title Type Date
PDF6.21 MB
Datasheet
PDF509 KB
Application Note
PDF397 KB
Application Note
PDF12.28 MB
Manual - Development Tools
PDF866 KB
White Paper

Design & Development

Software & Tool Pages

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

Software Downloads

Title Type Date
EXE2.72 MB
Library
XLSX55 KB
Library
ZIP6.34 MB
PCB Design Files

Boards & Kits

Models

Title Type Date
SXSCH716 KB
Model - Other
SXSCH716 KB
Model - Other
SXSCH716 KB
Model - Other
SXSCH716 KB
Model - Other

Support