InnoSwitch3-EP and InnoSwitch4-QR GaN flyback switchers designed for server, PC standby, and industrial supplies up to 220 W and 1250 V.
The InnoSwitch families of ICs dramatically improve the efficiency of flyback power converters, particularly those requiring a compact form-factors. These power switchers incorporate primary and secondary controllers, PowiGaN™ power switch and safety-rated feedback (FluxLink™) into a single IC.
InnoSwitch3 family of flyback switcher ICs feature the company’s proprietary 900 V and 1250 V PowiGaN technology, deliver up to 100 watts with better than 93 percent efficiency, eliminating the need for heat sinks and streamlining design of space-challenged applications. InnoSwitch3 designs also offer exceptional light-load efficiency making them ideal for auxiliary server power supplies.
The InnoSwitch4-QR family slashes component count in high efficiency flyback designs up to 220 W. The family features a robust 750 V PowiGaN primary switch and a steady-state switching frequency of up to 155 kHz. When paired with HiperPFS-5 power factor correction (PFC) ICs, they can deliver up to 220 W output in simple flyback designs for high-power applications that don't require an active clamp drive.
Features
InnoSwitch3-EP
- 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
InnoSwitch4-QR
- Quasi-Resonant (QR) operation for high efficiency
- Robust 750 V PowiGaN primary switch
- Steady-state switching frequency up to 155 kHz minimizes transformer size
- Synchronous rectification driver and secondary-side sensing
- Integrated FluxLink, HIPOT-isolated, feedback link
- Precise CV/CC accuracy, independent of external components
- Accurate, adjustable output current sense using external sense resistor
Applications
- Computers and servers
- Ultra-low standby applications
- Adapters and chargers
- Industrial and metering
Key components
- Primary and secondary controllers
- PowiGaN power switch (750, 900, or 1250 V)
- Safety-rated feedback and isolation (FluxLink)
Related products
InnoSwitch3, InnoSwitch4, and InnoSwitch5 product families
Benefits
InnoSwitch3-EP
- Up to 100 W
- Up to 93% efficiency
- Eliminates heatsinks
- Compact designs for space-constrained applications
InnoSwitch4-QR
- Up to 200 W
- Up to 95% efficient
- Less than 30 mW no-load consumption including line sense
- Low component count in high efficiency designs