Off-Line Multiple Output QR Flyback Switcher IC with Integrated 650 V, 725 V or 750 V Switch, Synchronous Rectification and FluxLink Feedback

Must be paired with InnoMux controller IC.
Typical Application / Performance

Data Sheets

InnoSwitch3-MX Data Sheet

Off-Line multiple output QR flyback switcher IC with integrated 650 V, 725 V or 750 V switch, synchronous rectification and FluxLink feedback, must be paired with InnoMux controller IC
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Product Details

This version of InnoSwitch3 is intended to be used with InnoMux for multiple output, single-stage power supplies for monitors and TVs. This enables very high system efficiency on a small PCB foot print.

The InnoSwitch3-MX dramatically simplifies the development and manufacturing of multiple output power supplies, particularly those in compact enclosures or with high efficiency requirements. The InnoSwitch3-MX architecture is revolutionary in that the devices incorporate both primary and secondary controllers, with sense elements and a safety-rated feedback mechanism into a single IC.

Close component proximity and innovative use of the integrated communication link, FluxLink, permit accurate control of a secondary-side synchronous rectification MOSFET with Quasi-Resonant switching of primary integrated high-voltage switch to maintain high efficiency across the entire load range.

Product Highlights

Based on InnoSwitch3

  • Partner IC to InnoMux
  • High efficiency across full load range
  • Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 650 V, 725 V or 750 V switch, secondary-side sensing and synchronous rectification driver
  • Integrated FluxLink™, HIPOT-isolated, feedback link
  • Instantaneous transient response ±5% CV with 0%-100%-0% load step

PowiGaN Technology

EcoSmart™ – Energy Efficient

  • Easily meets all global energy efficiency regulations
  • Low heat dissipation

Advanced Protection / Safety Features

  • Primary sensed output OVP
  • Open SR FET gate detection
  • Hysteretic thermal shutdown
  • Input voltage monitor with accurate brown-in/brown-out and overvoltage protection

Full Safety and Regulatory Compliance

  • Reinforced insulation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT compliance testing
  • UL1577 and TUV (EN60950) safety approved
  • Enables designs that have “A” performance criteria for EN61000-4 suite of test standards, including EN61000-4-2, 4-3 (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m)

Green Package

  • Halogen free and RoHS compliant


Power Table

Output Power (Watts)


85-265 VAC

INN3464C650 V18 W23 W
INN34x5C650 / 725 V22 W28 W
INN34x6C650 / 725 V28 W35 W
INN34x7C650 / 725 V35 W44 W
INN3468C4650 V40 W50 W
INN3478C4750 V55 W65 W
INN3479C4750 V65 W75 W
INN3470C4750 V75 W85 W


  1. Continuous power using nominal primary current limit in a typical open frame application at +50 °C ambient with adequate PCB thermal design to ensure package temperature <125 °C.
  2. Continuous power using maximum primary current limit in a typical open frame application at +50 °C ambient with adequate heat sinking to ensure package temperature <125 °C.
  3. Package: InSOP-24D.
  4. Incorporates PowiGaN™ technology

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