• Tight PSR CC/CV Regulation Over Entire Operating Range
• Integrated 200V MOSFET
• QR Mode and PWM/PFM Control for Higher Average Efficiency 
• Maximum Switching Frequency Limitation 300kHz
• Low Start Up Current: 4μA Max 
• Internal CC/CV Loop Compensation
• Reliable Protections for OVP, SCP, OTP
• Compact Package: SO8

SY22856A is a Flyback regulator targeting at Constant Current/Constant Voltage (CC/CV) applications. It integrates a 200V MOSFET in a compact SO8 package to minimize the size. Both the output current and voltage are sensed on the primary side, eliminating the opto-isolator and the secondary side feedback circuitry, and minimizing the overall system cost.

SY22856A adopts the quasi-resonant operation and the adaptive PWM/PFM control to achieve the highest average efficiency and the best EMI performance. In addition, to reduce capacitors and magnetic volume, the maximum frequency is up to 300kHz.

SY22856A provides reliable protections such as VCC Over Voltage Protection (OVP), Short Circuit Protection (SCP), Over Temperature Protection (OTP), Output Over Voltage Protection (OVP), VSEN Pin Short Protection, etc.