Off-Line CV/CC QR Flyback Switcher IC with Integrated 725 V / 900 V MOSFET, Synchronous Rectification and FluxLink Feedback, for Applications up to 45 W

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InnoSwitch3-EP ECAD Models

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Product Details

The InnoSwitch™3-EP family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-EP family incorporates primary and secondary controllers and safety-rated feedback into a single IC.

InnoSwitch3-EP family devices incorporate multiple protection features including line over and under-voltage protection, output over-voltage and over-current limiting, and over-temperature shutdown. Devices are available with standard and peak power delivery options, and commonly used auto-restart protection behaviors.

Product Highlights

Highly Integrated, Compact Footprint

  • Very high efficiency across full load range
  • Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 725 V / 900 V MOSFET, secondary-side sensing and synchronous rectification driver
  • Excellent multi-output cross regulation with weighted secondary-side
    regulation (SSR) feedback and synch FETs
  • Integrated FluxLink™, HIPOT-isolated, feedback link
  • Exceptional CV/CC accuracy, independent of external components
  • Adjustable accurate output current sense using external output sense resistor

EcoSmart™ – Energy Efficient

  • Less than 15 mW no-load including line sense
  • Easily meets all global energy efficiency regulations
  • Low heat dissipation

Advanced Protection / Safety Features

  • Open SR FET-gate detection
  • Fast input line UV/OV protection
  • Auto-restart fault response for output OVP

Optional Features

  • Auto-restart output UV protection with option for peak power delivery

Full Safety and Regulatory Compliance

  • Reinforced isolation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT testing
  • UL1577 and TUV (EN60950) safety approved
  • Excellent noise immunity enables designs that achieve class “A” performance criteria for EN61000-4 suite; 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) and Ford FMC1278 (RI-115)

Green Package

  • Halogen free and RoHS compliant


Power Table

Output Power Table
230 VAC ±15%85-265 VAC
Peak or Open Frame1,2Peak or Open Frame1,2
INN3672C-H6XX12 W10 W
INN3673C-H6XX15 W12 W
INN3674C-H6XX25 W20 W
INN3675C-H6XX30 W25 W
INN3676C-H6XX40 W36 W
INN3677C-H6XX45 W40 W
230 VAC ±15%85-265 VAC
Peak or Open Frame1,2Peak or Open Frame1,2
INN3692C-H60612 W10 W
INN3694C-H60625 W20 W
INN3696C-H60635 W30 W


  1. Minimum continuous power in a typical non-ventilated enclosed typical size adapter measured at 40 °C ambient. Max output power is dependent on the design. With condition that package temperature must be < 125 °C
  2. Minimum peak power capability
  3. Package: inSOP-24D

InnoSwitch-3 Feature Codes

InnoSwitch-3 ICs are highly configurable, and require a "Feature Code" to specify all of the configurable characteristics, such as the Auto Restart Threshold, Fault Response, and others. Feature Codes consist of the letter "H" followed by three numbers and are added to the end of the base part number. A Feature Code is required when ordering parts (e.g., INN3762C-H601).

The tables below provide a list of the characteristics of the Feature Codes, and the  parts available with that Feature Code. Please use these to determine which InnoSwitch-3 part is the best fit for your application. Alternatively, you can use our Build Your Own InnoSwitch tool.

CDCAR ThresholdOTP ResponseAR and OVL ResponseOutput ProfileVout OVPSecondary
H6010 mV90%HystereticARFixed CC120%AR
H6020 mVOLHystereticARFixed CC120%AR
H6060 mVOLHystereticARFixed CC120%AR
 Common Feature Code
INN3672C-H6XXpdf iconpdf icon
INN3673C-H6XXpdf iconpdf icon
INN3674C-H6XXpdf iconpdf icon
INN3675C-H6XXpdf iconpdf icon
INN3676C-H6XXpdf iconpdf icon
INN3677C-H6XXpdf iconpdf icon

= indicates part available with that Feature Code

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