PowiGaN is Power Integrations’ internally developed gallium nitride (GaN) technology. PowiGaN switches replace the traditional silicon transistors on the primary side of PI’s highly integrated offline flyback switcher ICs, reducing switching losses and enabling chargers, adapters and open frame power supplies that are more efficient, smaller and lighter than silicon alternatives.

Which PI InnoSwitch products feature PowiGaN technology?

PowiGaN-based ICs achieve up to 95% efficiency across the full load range and up to 100 W in enclosed adapter implementations without requiring a heatsink.

  • InnoSwitch3-CP - best for constant power charging
  • InnoSwitch3-EP - best for open frame power supplies
  • InnoSwitch3-Pro - best for dynamically controllable voltage and current, including USB PD PPS applications
  • MinE-CAP - best for reducing capacitor size in chargers, optional companion device for InnoSwitch3 switcher ICs

Key features

  • Unmatched efficiency
  • Straightforward design process
  • VDS(MAX) 750 V
  • Up to 100 W in an InSOP™ package
  • Qualified to JEDEC standards

Highly integrated devices enable compact footprint

Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary-Side Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile

The InnoSwitch3-CP family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-CP family incorporates a high-voltage primary-side switch, primary and secondary controllers, and safety-rated feedback into a single IC. These devices incorporate multiple protection features including line over and under-voltage protection, output over-voltage and over-current limiting, and over-temperature shutdown.

Devices are available that support the common combinations of latching and auto-restart behaviors required by applications such as quick charge and USB PD designs. The devices are available with and without cable-drop compensation.

InnoSwitch3-CP
InnoSwitch3-CP-Schematic
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Product highlights

Highly integrated, Compact footprint

  • Quasi-Resonant (QR) / CCM flyback controller, high-voltage primary-side switch, secondary-side sensing and synchronous rectification driver
  • Integrated FluxLink, HIPOT-isolated, feedback link
  • Easily interfaces to load-directed and fast-charge protocol ICs
  • 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

PowiGaN technology

  • PI’s proprietary gallium nitride technology
  • Up to 100 W output without heatsinks
  • INN3278, INN3279 and INN3270

EcoSmart – energy efficient

  • Up to 95% efficiency across full load range
  • Less than 30 mW no-load including line sense
  • Easily meets all global energy efficiency regulations
  • Low heat dissipation

Advanced protection / Safety features

  • Secondary switch 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, EN62368) 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)

Highly integrated devices enable compact footprint

Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary-Side Switch, Synchronous Rectification and FluxLink Feedback

The InnoSwitch3-EP family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-EP family incorporate a high-voltage power switch, primary and secondary controllers, and safety-rated feedback into a single IC.

These devices incorporate multiple protection features including line over and under-voltage protection, output over-voltage and over-current limiting, and over-temperature shutdown. Devices are available with standard and peak power delivery options, and commonly used auto-restart protection behaviors.

InnoSwitch3-EP
InnoSwitch3-EP-Schematic
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Product highlights

Highly integrated, Compact footprint

  • Very high efficiency across full load range
  • Incorporates a multi-mode Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch, secondary-side sensing and synchronous rectification driver
  • Excellent multi-output cross regulation with weighted secondary-side regulation (SSR) feedback and synch FETs
  • Integrated FluxLink, HIPOT-isolated, feedback link
  • Exceptional CV/CC accuracy, independent of external components
  • Adjustable accurate output current sense using external output sense resistor

PowiGaN technology

  • PI’s proprietary gallium nitride technology
  • Up to 100 W output without heatsinks
  • INN3678, INN3679 and INN3670

EcoSmart – energy efficient

  • Less than 30 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

  • Open SR FET-gate detection
  • Fast input line UV/OV protection
  • Auto-restart fault response for output OVP
  • 750 V Switch rating series for excellent surge protection

Optional features

  • Auto-restart output UV protection with option for peak power delivery

Full safety and regulatory compliance

  • Reinforced insulation
  • Isolation voltage >4000 VAC
  • 100% production HIPOT testing
  • UL1577 and TUV (EN60950, EN62368) 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) and Ford FMC1278 (RI-115)

Highly integrated devices enable compact footprint

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

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.

InnoSwitch3-Pro
InnoSwitch3-Pro-Schematic
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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

Applications

  • 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

Videos

What is GaN?
GaN’s reliability and robustness
GaN applications
Introduction to MinE-CAP