Power Integrations InnoSwitch3-Pro Series

Power Integrations InnoSwitch3-Pro series offline switcher ICs

Power Integrations has announced the InnoSwitch3-Pro family of configurable offline CV/CC and CP flyback switcher ICs

Power Integrations InnoSwitch3-Pro Series Offline Switcher ICs

Power Integrations has announced the InnoSwitch3-Pro family of configurable offline CV/CC and CP flyback switcher ICs. Capable of delivering up to 65 W and achieving up to 94% efficiency across line and load conditions, the new devices permit precise, dynamically adjustable, control of voltage (10 mV step) and current (50 mA step), via a simple two-wire I2C interface. Devices may be paired with a microcontroller or take inputs from the system CPU to control and monitor the off-line power supply. Applications include virtually any rapid-charging protocol, including USB Power Delivery (PD) 3.0 + PPS, Quick Charge™ 4/4+, AFC, VOOC, SCP, FCP and other industrial and consumer battery chargers, dimmable LED ballast drivers and field-configurable industrial power supplies.
InnoSwitch3-Pro power-conversion ICs include a microprocessor VCC supply - eliminating the need for an external LDO to power the microcontroller; also included is an n-channel FET driver which may be used to enable or disable the main power output. Together with integrated bus voltage, current and fault-reporting telemetry and dynamically configurable protection functions such as OTP, line OV/UV, output OV/UV, and short-circuit, the BOM count for a sophisticated offline power supply is significantly reduced and design complexity is dramatically simplified.
New InnoSwitch3-Pro ICs employ Power Integrations’ high-speed digital communications technology, FluxLink™, plus synchronous rectification, quasi-resonant switching and a precise secondary-side feedback sensing and feedback control circuit. Devices are CQC certified, UL recognised and TUV (EN60950) approved to bridge the isolation barrier; the products’ InSOP™-24D package also provides a low-profile, thermally efficient solution with extended creepage (>11.5 mm) and clearance between primary and secondary sides for high reliability, surge protection and ESD robustness.
InnoSwitch3-Pro ICs target fast-charging protocols for applications such as smartphones, notebooks, tablets, smart speakers and non-charging applications that require either a  load-controlled or configurable output.



  • Digitally Controlled via I2C Interface
    • Dynamic adjustment of power supply voltage and current
    • Telemetry status read-back with processor interrupt
    • Comprehensive set of configurable features
  • Highly Integrated, Compact Footprint
    • Multi-mode Quasi-Resonant (QR) / CCM flyback controller, 650 V or 725 V MOSFET, secondary-side sensing and synchronous rectifier driver
    • Optimized efficiency across line and load range
    • Integrated FluxLink™, HIPOT-isolated, feedback link
    • Instantaneous transient response
    • Drives low-cost N-channel MOSFET series load switch
    • Integrated 3.6 V supply for external MCU
  • EcoSmart™ – Energy Efficient
    • Less than 30 mW no-load including line sense and MCU
    • Easily meets all global energy efficiency regulations
    • Low heat dissipation
  • Advanced Protection / Safety Features
    • Input voltage monitor with accurate brown-in/brown-out and overvoltage protection
    • Output OV/UV fault detection with independently configured responses
    • Secondary FET / diode short protection
    • Open SR FET gate detection
    • Hysteretic thermal shutdown
    • Programmable watchdog timer functionality for system faults
    • Telemetry for power supply status and fault monitoring
  • Full Safety and Regulatory Compliance
    • Reinforced insulation
    • Isolation voltage >4000 VAC
    • 100% production HIPOT compliance testing
    • UL1577 and TUV (EN60950) safety approved
  • Green Package
    • Halogen free and RoHS compliant



  • High efficiency USB PD 3.0 + PPS/QCA adapters
  • Multiprotocol adapters including QuickCharge, AFC, FCP, SCP
  • Direct-charge mobile device chargers
  • Multi-chemistry tool and general purpose battery chargers
  • Adjustable CV and CC LED ballast designs up to 65 W

Power Integrations InnoSwitch3-Pro Switcher ICs | Avnet Abacus

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