Power Integrations InnoSwitch3 Family

InnoSwitch3 offline flyback switcher ICs

Power Integrations launches the InnoSwitch™3 family of offline CV/CC flyback switcher ICs. The new devices achieve up to 94% efficiency across line and load conditions, slashing power supply losses by a further 25% and enabling the development of compact power supplies up to 65 W without heatsinks. InnoSwitch3 devices are ideal for power supplies with challenging energy consumption, footprint or thermal constraints, particularly those targeting mandatory Total Energy Consumption (TEC) specifications.

The InnoSwitch3 IC family is optimized into three application-specific series:
l CE: Current External. Includes accurate CC/CV regulation with external output current sense for optimum design flexibility. Targets compact single-voltage chargers, adapters, IoT and building automation.
l CP: Constant Power. Ideal for USB Power Delivery (PD), rapid charging and other applications where a dynamic output voltage is required.
l EP: Embedded Power. Features the family’s highest-rated MOSFET (725 V) and provides full line and load protection with excellent multi-output cross-regulation for demanding industrial applications and appliances.

Power Integrations, launches the InnoSwitch™3 family of offline CV/CC flyback switcher ICs.

These newest flyback switcher ICs employ Power Integrations’ innovative isolated digital communications technology, FluxLink™, plus synchronous rectification, quasi-resonant switching and a precise secondary-side feedback sensing and control circuit. This results in highly efficient, accurate, reliable power supply circuits without the need for optocouplers. InnoSwitch3 devices are CCC, UL and VDE safety-certified to bridge the isolation barrier, and the InSOP™-24 package provides a low-profile, thermally efficient solution with extended 11.5 mm creepage and clearance between primary and secondary sides for high reliability, surge and ESD robustness. The new devices also incorporate a host of protection features, including lossless line overvoltage and under-voltage, output overvoltage, over-power, over-current and over-temperature protection, as well as output rectifier short-circuit protection. Device sub-families are provided with either latching or auto-recovery capability, according to the typical demands of each target application space. All InnoSwitch3 ICs feature on-board high-voltage MOSFETs (rated at 650 V for the CP and CE series and 725 V for the EP series).


Features Applications
  • Highly Integrated, Compact Footprint
    • Up to 94% efficiency across full load range
    • Quasi-Resonant (QR) / CCM flyback controller, 650 V or 725 V MOSFET4, secondary-side sensing and synchronous rectification driver
    • Integrated FluxLink™, HIPOT-isolated, feedback link
    • Supports fast charge protocols such as USB PD/QC 4.0
    • Constant Power (CP) Profile minimizes charging time with continuous adjustment of output current and voltage
    • Accurate CV/CC/CP, independent of external components
    • External IS resistor allows custom CC programming
    • Instantaneous transient response with 0%-100%-0% load step
  • EcoSmart™– Energy Efficient
    • Less than 15 mW no-load including line sense
    • Easily meets all global energy efficiency regulations
    • Low heat dissipation
  • Green Package
    • Halogen free and RoHS compliant
  • Advanced Protection / Safety Features
    • Secondary MOSFET or diode short-circuit protection
    • Open SR FET-gate detection
    • Fast input line UV/OV protection
  • Optional Features
    • Cable-drop compensation with multiple settings
    • Variable output voltage, constant current profiles
    • Auto-restart or latching fault response for output OVP/UVP
    • Multiple output UV fault thresholds
    • Latching or hysteretic primary over-temperature protection
  • 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 for EN61000-4; 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)
  • High efficiency flyback designs up to 65 W
  • USB PD / QC / proprietary protocol chargers
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