• Suitable for CCM, DCM and QR Mode Flyback Converter
• Proprietary Operation Mode for Flyback ZVS
• DSEN Pin Sensing up to 200V
• DSEN Falling Slope Rate Detection to Avoid False Turn on of SR MOSFET by Parasitic Ring
• DSEN High Voltage Blanking Time Detecting to Enhance System ESD Performance
• Dual Power Supply Channels for 3V to 30V Output Systems
• Power Saving Mode to Improve Light Load Efficiency
• Up to 500kHz Switching Frequency
• 10ns Typical Turn off Propagation Delay
• 2A Sink, 0.5A Source Gate Driver Capability
• Compact Package: SOT23-6 

SY5236/A is a Flyback synchronous rectifier (SR) controller with high performance capabilities. It is suitable for continuous conduction mode (CCM), discontinuous conduction mode (DCM) and quasiresonant (QR) mode Flyback converter.

The SY5236/A adopts proprietary operation mode to achieve Flyback zero voltage switching (ZVS) turn-on, which can greatly improve Flyback efficiency and power density. The SY5236/A also adopts the adaptive gate voltage control for safe operation.

SY5236/A uses DRAIN sense (DSEN) voltage falling slope rate detection to avoid SR MOSFET false turn on caused by parasitic ringing in DCM or QR mode.

During light load conditions, the controller enters power saving mode to improve light load efficiency.

The SY5236/A is available in a SOT23-6 package.