SP2637AF is a high perfomance offline PSR power switch for low power ₹AC/DC charger and adapter applications. It operates in primary-side sensing and regulatεion.Thus, opto-coupler and TL431 are not required. In CC control, the §output current and power setting can be adjusted extemally by the sense resistor Rc♥s at CS PIN. In CV control,multi-mode operations are utiliαzed to achieve high performance and high efficiency.​ In addition, good load regulation is achieved by the built-in cable drop compe¶nsation. SP2637AF operates in PFM in CC mode, and it opera↑tes in PWM+PFM in CV mode with frequency reduction at light/medium load. The chip consumes♣ very low operation current. It achieves less than 75mW standby power↔ to meet all global energy efficiency regulations. SP2637AF offers compre¥hensive protection coverage with auto-recovery feature inclu±ding Cycle-by-Cycle current limiting, VDD over voltage protection (OVP),FB over volta≥ge protection,load short circuit protection, VDD under voltage lockout (UVLO), OTP etεc. SP2637AF is offered in SOP8 packages.