The FL014E is a highly integrated offline quasi-resonant flyback converter from Infineon Technologies, designed for low-power AC/DC adapter applications. This controller combines a PWM controller and a high-voltage CoolSET MOSFET in a single package, enabling compact and efficient power supply designs. The quasi-resonant operation minimizes switching losses and electromagnetic interference (EMI), while integrated protection features enhance the reliability and safety of the power supply.

Applications

• AC/DC adapters for mobile devices
• Chargers for smartphones and tablets
• Standby power supplies for home appliances
• Auxiliary power supplies in industrial equipment
• LED lighting power supplies

Features

• Quasi-Resonant operation: Minimizes switching losses and EMI.
• Integrated CoolSET MOSFET: Reduces component count and simplifies design.
• Active Burst Mode: Improves efficiency at light load conditions.
• Frequency jittering: Reduces EMI emissions.
• Over-temperature protection (OTP): Protects the device from overheating.
• Overload protection (OLP): Prevents damage from excessive output current.
• Short-circuit protection (SCP): Protects the device and load from short circuits.

Benefits

• High efficiency: Quasi-resonant operation and active burst mode minimize power losses.
• Compact design: Integration of controller and MOSFET reduces board space.
• Low EMI: Quasi-resonant operation and frequency jittering reduce electromagnetic interference.
• Robust protection: OTP, OLP, and SCP enhance system reliability.
• Simplified design: Integrated features reduce the complexity of power supply design.

Additional Details

The FL014E integrates a 700V CoolSET MOSFET, allowing for a wide input voltage range. The quasi-resonant operation ensures that the MOSFET switches at the valley of the drain-source voltage, minimizing switching losses and improving efficiency. The active burst mode reduces power consumption at light loads, further enhancing efficiency. The frequency jittering feature spreads the EMI spectrum, reducing peak emissions. The integrated protection features, including over-temperature protection, overload protection, and short-circuit protection, ensure safe and reliable operation under various fault conditions. This controller is suitable for low-power AC/DC adapter applications where efficiency, size, and reliability are critical requirements.