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Digitally Controllable Off-Line CV/CC QR Flyback Switcher IC with Integrated High-Voltage Switch, Synchronous Rectification and FluxLink Feedback


Product Details

The InnoSwitch3-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.

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

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


Output Power (Max) - Open Frame, 230V 30.00 W
Output Power (Max) - Enclosed, 230V 25.00 W
Output Power (Max) - Enclosed, Univ 22.00 W
Output Power (Max) - Open Frame, Univ 25.00 W
Switching Frequency (min) 25.00 kHz
Switching Frequency (max) 95 kHz
Breakdown Voltage 725 V
Voltage - Output (Min) 3.00 V
Voltage - Output (Max) 24.00 V
Voltage - Input (Min) 85 V
Voltage - Input (Max) 265 V
Auto-Restart & Overvoltage Response
Latch Off
Cable Drop Compensation X
IC Package InSOP-24D
Internal Switch Yes
Over-Temperature Response Hysteretic
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C
Control Scheme Fluxlink
Protection Features
Open SR FET Detection
Input Overvoltage
Input Undervoltage
Output Overvoltage
Output Overload
Output Profile CV/CC
Topology Flyback
Product Sub-Type PMIC
MSL Rating 3
Secondary Response
Latch Off