The iW3671 front-end flyback power factor correction device provides high power factor (PF >0.9) and low THD (<20%) down to 33% load current using Renesas' PF-Boost™ technology. The device can be configured in both isolated and non-isolated configurations, as a buck, buck-boost or flyback converter, and consumes less than 150mW no-load standby power at 230VAC

The iW3671 integrates a full range of protection features including output overvoltage, over-power, input overvoltage and undervoltage, overcurrent and sense resistor short circuit protection, open loop, and over-temperature protection.

For an integrated high-voltage startup option, see the iW3677.


  • 100W Offline Controller Supports Isolated and Non-isolated Flyback, Buck and Buck-Boost
  • PF >0.9 and THD <20% Across Input Voltage at Output Power >33%
    • THD <10% at Full Load, Across the Input Voltage Range
  • Supports Wide AC Input Voltage – 90VAC to 305VAC with Tight AC Load and Line Regulation (±3%)
  • Fast PFC Ready Time <0.2s
  • Standby Power - <150mW at Input Voltage of 230VAC
  • Fully Protected
    • Output Overvoltage, Over-Power, Overcurrent, Sense-Resistor Short Protections
    • Input Voltage Undervoltage and Overvoltage Protection
    • Built-In Over-Temperature Protection
    • Open Loop Protection




  • Commercial Lighting:
    • External Fixture Drivers


Type Title Date
Datasheet Log in to Download PDF 2.13 MB 简体中文
Product Brief PDF 534 KB 简体中文
Brochure PDF 5.49 MB 日本語
Other Log in to Download ZIP 6.12 MB
Other Log in to Download ZIP 6.04 MB
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Design & Development