Solution Finder


CV/CC QR Flyback Switcher IC with Integrated 750 V and 900 V Switch and FluxLink Feedback for Automotive Applications

Product Details

The InnoSwitch3-AQ family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-AQ family combines primary and secondary controllers and safety-rated feedback into a single IC allowing accurate output voltage regulation even with wide input voltage range of 30 VDC to 925 VDC.

InnoSwitch3-AQ family devices incorporate multiple protection features including line over and undervoltage protection, output overvoltage and over-current limiting, and over-temperature shutdown for automotive applications. Devices are available with standard and peak power delivery options, and commonly used auto-restart protection behaviors.

Product Highlights

Highly Integrated, Compact Footprint

  • AEC-Q100 qualified
  • Up to 90% efficiency across full load range
  • Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, 750 V and 900 V switch and secondary-side sensing
  • Integrated FluxLink, HIPOT-isolated, feedback link
  • Wide input voltage 30 V to 925 V with StackFET
  • Fab, assembly and test site are IATF16949 certified

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
  • 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), FMC1278 (RI-115)

Green Package

  • Halogen free and RoHS compliant


  • Auxiliary, standby and bias power supplies for automotive used in traction inverter, DC-DC converter and on-board charger
Power - Output (Max, VDC) 22.00 W
Power - Output (Max Low-Line) 7.00 W
Power - Output (Max High-Line) 14.00W
Switching Frequency (min) 25.00 kHz
Switching Frequency (max) 95 kHz
Breakdown Voltage 900 V
Voltage Input (Max, DC) 950.00V
Voltage Input (Min, DC) 30.00V
Auto-Restart & Overvoltage Response Auto-restart
Auto-Restart Threshold 90%
Cable Drop Compensation X
IC Package inSOP-24D
Integrated Diode
Internal Switch Yes
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Control Scheme Fluxlink
Protection Features
Input Overvoltage
Input Undervoltage
Open SR FET Detection
Output Overload
Output Overvoltage
Output Short Circuit
Output Undervoltage
Output Profile CV/CC
Topology Flyback
Product Sub-Type PMIC
MSL Rating 3
Secondary Response Auto-restart