• Proprietary Operation Mode for Flyback ZVS
• High Efficiency, High Power Density
• Adaptive Gate Voltage Control
• DSEN Falling Slope Rate Detecting to Prevent SR False Trigger
• 130V DSEN Pin to Directly Sense DRAIN Voltage of SR MOS
• Power Saving Mode to Improve Light Load Efficiency
• Dual Power Supply Channel for 3.3V to 21V Output Systems

SY23432 is a Flyback SR controller compatible with QR mode converter to achieve ZVS operation. The primary side PWM converter must work in quasi resonant mode. SY23432 adopts proprietary operation mode to achieve flyback ZVS turn on, which greatly improves Flyback efficiency and power density. SY23432 also adopts adaptive gate voltage control for safe operation.

SY23432 adopts DSEN voltage falling slope rate detecting technology to avoid SR MOSFET false turn on by parasitic ring under DCM or QR mode.

The SY23432 is available in a DFN2*3-8 package.