• Tight PSR CC/CV Regulation Over Entire Operating Range
• QR-mode Operation for High Efficiency
• PWM/PFM Control for High Average Efficiency
• Fast Dynamic Load Transient Response
• Cable Compensation for Better Load Regulation
• No-load Power is Less than 20mW
• Integrated HV Start up Circuit
• Brown-in and Brown-out Function
• Reliable Protections for OVP, UVP, SCP, OTP
• Reliable Protections for Safety Requirement
• Minimum Switching Frequency Limitation 250Hz
• Maximum Switching Frequency Limitation 90kHz
• Integrated 700V MOSFET
• RoHS Compliant and Halogen Free
• Compact Package: SO7

SY23407 is a single stage Flyback regulator targeting at Constant Current/Constant Voltage (CC/CV) applications. It integrates a 700V MOSFET in a compact SO7 to minimize the size. Both the output current and voltage are sensed on the primary side, eliminating the opto-coupler and the secondary side feedback circuitry, and minimizing the overall system cost.

SY23407 adopts the quasi-resonant operation mode and adaptive PWM/PFM control to achieve the highest average efficiency and best EMI performance. The no load switching frequency can be as low as 250Hz, minimizing the no-load power loss.

SY23407 has programmable cable compensation to provide a better load regulation for the output voltage at the cable terminals. When SY23407 is used with secondary side synchronous rectifier which has watch dog inside, fast dynamic load response can be achieved.

SY23407 has brown-in and brown-out functions. In addition, SY23407 provides reliable protections including VIN Over Voltage Protection (VIN OVP), output Over Voltage Protection (OVP), output Under Voltage Protection (UVP), Short Circuit Protection (SCP), Over Temperature Protection (OTP), etc