PWM-QR (quasi-resonant) flyback ICs

The 5th generation of high-performance, quasi-resonant flyback ICs for AC-DC power conversion

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Overview

The ICE5QSBG 5th-generation quasi-resonant flyback PWM controller offers high performance and a complete suite of protection to increase system robustness in AC-DC power conversion. Novel QR quasi-resonant (patent pending) switching limits the spread of switching frequency between high/low line input and thus lowers the EMI signature. Designers can lower system design costs by using higher switching frequencies and smaller magnetics.

Key Features

  • Novel quasi-resonant switching
  • Selectable active burst mode
  • Built-in digital soft start
  • Adjustable line input overvoltage
  • Brown IN/OUT protection
  • OLP, output short protection
  • VCC pin short-to-ground protection
  • Integration with CoolMOS™ P7
  • OTP with hysteresis
  • VCC over/under-voltage protection
  • Output over-voltage protection

Products

About

5th-generation PWM quasi-resonant flyback controller and CoolSET

Key benefits: High efficiency with the latest CoolMOS™ P7 family and quasi-resonant switching scheme, auto-restart recovery scheme to minimize interruption to system operation, extensive protection coverage to increase system robustness, and rapid start-up performance with cascode configuration. 

Key applications are offline aux SMPS for servers, PC power, aircon, refrigerator, audio and main SMPS for adapters, set-top boxes, water purifiers, TV, industrial SMPS, and PoE.

Single-stage flyback AC-DC controller

The single-stage flyback AC-DC controller ICs for constant voltage output are tailored for example for cost-efficient LED lighting and power supply applications. They offer an optimal price-performance ratio with excellent power factor, THD, low EMI, and optimum efficiency at high light quality. Infineon's portfolio covers a basic product variant as well as advanced, and even fully-featured product variants which enable smart lighting, enriched with features such as low stand-by power and jitter for emergency lighting.

5th-generation PWM quasi-resonant flyback controller and CoolSET

Key benefits: High efficiency with the latest CoolMOS™ P7 family and quasi-resonant switching scheme, auto-restart recovery scheme to minimize interruption to system operation, extensive protection coverage to increase system robustness, and rapid start-up performance with cascode configuration. 

Key applications are offline aux SMPS for servers, PC power, aircon, refrigerator, audio and main SMPS for adapters, set-top boxes, water purifiers, TV, industrial SMPS, and PoE.

Single-stage flyback AC-DC controller

The single-stage flyback AC-DC controller ICs for constant voltage output are tailored for example for cost-efficient LED lighting and power supply applications. They offer an optimal price-performance ratio with excellent power factor, THD, low EMI, and optimum efficiency at high light quality. Infineon's portfolio covers a basic product variant as well as advanced, and even fully-featured product variants which enable smart lighting, enriched with features such as low stand-by power and jitter for emergency lighting.

Documents

Documents

Design resources

Developer community

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