INN4774C-H190

The InnoSwitch™4-QR family of ICs dramatically improve the efficiency of flyback power converters, particularly those requiring a compact form-factor. The InnoSwitch4-QR family incorporates primary and secondary controllers, PowiGaN power switch and safety-rated feedback (FluxLink) into a single IC.

The InnoSwitch4-QR IC also incorporates multiple protection features including output overvoltage and over-current limiting, and overtemperature shutdown. Devices are available that support combinations of latching and auto-restart protection modes typically required for applications such as chargers, adapters, consumer electronics and industrial systems.

Product Highlights

Highly Integrated, Compact Footprint

• 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

EcoSmart – Energy Efficient

• Up to 95% efficient
• Less than 30 mW no-load consumption including line sense 

Advanced Protection / Safety Features

• 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

Optional Features

• Open SR FET-gate detection
• Fast input line UV/OV protection
• Output overvoltage and undervoltage protection
• Output over-current protection
• Over-temperature protection (OTP)

Full Safety and Regulatory Compliance

• Reinforced isolation >4000 VAC
• 100% production HIPOT testing
• UL1577 isolation voltage 4000 VAC (max), TUV (EN62368-1), CQC (GB4943.1) 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)

Green Package

• Halogen free and RoHS compliant