• Integrated 900V MOSFET
• Very Tight Primary Side CV/CC Regulation
• Quasi-resonant Mode and PWM/PFM Control for Higher Average Efficiency 
• Internal CC/CV Loop Compensation
• HV Start up Circuit to Reduce No-load Loss
• Reliable Protections for OVP,SCP,OTP,
• Input Voltage OVP 
• Reliable Protections for Safety Requirement
• Maximum Switching Frequency Limitation 125kHz
• Compact Package: SSOP10

 SY23433 is a single stage Flyback regulator targeting at Constant Current/Constant Voltage (CC/CV) high input voltage applications. It integrates a 900V MOSFET to decrease physical volume. Both the output current and voltage are sensed by primary side signal process. SY23433 operates quasi-resonant mode and adaptive PWM/PFM control for highest average efficiency. In addition, SY23433 integrates fast internal HV start up circuit to minimize no-load loss and external components. Input voltage OVP function has been integrated in SY23433 to protect converter from high voltage breakdown.