Off-Line CV/CC Flyback Switcher IC with Integrated 650 V MOSFET

Typical Application/Performance

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InnoSwitch-CE ECAD Models

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Product Details

The InnoSwitch™-CE family of ICs dramatically simplify the development and manufacturing of low-voltage, high current power supplies, particularly those in compact enclosures or with high efficiency requirements. The InnoSwitch-CE 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 permit accurate control of both a secondary-side synchronous rectification MOSFET and optimization of primary-side MOSFET switching. This improves system reliability, maximizes efficiency across the power range from full load to low-power standby.

Product Highlights

Highly Integrated, Compact Footprint

  • Incorporates flyback controller, 650 V MOSFET, secondary-side sensing and synchronous rectification driver
  • FluxLink™ integrated, HIPOT-isolated, feedback link
  • Exceptional CV accuracy, tolerant of transformer and board component variances
  • Adjustable accurate output current

EcoSmart™– Energy Efficient

  • <10 mW no-load at 230 VAC when supplied by transformer bias winding
  • Easily meets all global energy efficiency regulations Advanced Protection / Safety Features
  • Primary sensed output OVP
  • Secondary sensed output overshoot clamp
  • Secondary sensed output OCP to zero output voltage
  • Hysteretic thermal shutdown
  • Input voltage monitor with accurate brown-in/brown-out and overvoltage protection

Full Safety and Regulatory Compliance

  • 100% production HIPOT compliance testing equivalent to 6 kV DC/1 sec
  • Reinforced insulation
  • Isolation voltage >3,500 VAC
  • UL1577 and TUV (EN60950) safety approved
  • EN61000-4-8 (100 A/m) and EN61000-4-9 (1000 A/m) compliant Green Package
  • Halogen free and RoHS compliant Applications
  • High current charger and adapters for mobile devices
  • Consumer electronics − set top boxes, networking, gaming, LED


Power Table

Output Power (Watts)
85-265 VAC
Adapter1Peak or
INN21x3K312 W15 W
INN21x4K315 W20 W
INN21x5K320 W25 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. x = 0 (no cable compensation), x = 2 (300 mV cable compensation).
  4. Package: K: eSOP-R16B.

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