New Products

InnoSwitch3-Pro Series Family of ICs

August 30, 2020 by Power Integrations

The InnoSwitch3-Pro is a digitally controllable off-line CV/CC QR flyback switcher IC with integrated high-voltage switch, synchronous rectification, and FluxLink feedback.

The InnoSwitch™3-Pro series family of ICs dramatically simplifies the development and manufacturing of fully programmable, highly efficient power supplies, particularly those in compact enclosures. The universal I²C interface enables dynamic control of output voltage and current along with many configurable features. Telemetry provides reporting of programmed features and fault modes.


typical application

Figure 1. Typical application


InnoSwitch3-Pro devices are ideal for AC/DC power supply applications where fine (10 mV, 50 mA) output voltage and current adjustment are necessary. Typical implementations comprise a system microprocessor or dedicated microcontroller with an I²C port that is used to configure, control and supervise operation of the power sub-system. The uVCC pin provides bias to the microprocessor in standalone implementations such as USB PD adapters and chargers.


Product Highlights

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


PowiGaN Technology

  • PI’s proprietary gallium nitride technology 
  • Up to 100 W output without heatsinks
  • INN3378, INN3379 and INN3370


Highly Integrated, Compact Footprint

  • Multi-mode Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch, 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 FET series load switch
  • Integrated 3.6 V supply for external MCU
  • 4.7 Ω ultra-fast SR pull-down resistance (Avaliable with H302 parts)


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
  • Open SR FET gate detection
  • Hysteretic thermal shutdown
  • Programmable watchdog timer functionality for system faults
  • Telemetry for power supply status and fault monitoring
  • IS pin short/output short-circuit fault detection (H302 parts)


Full Safety and Regulatory Compliance

  • Reinforced insulation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT compliance testing
  • UL1577 and TUV (EN60950, EN62368) 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