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 regulation.λThus, opto-coupler and TL431 are not required. In CC control, the outpεut current and power setting can be adjusted extemally by the se'nse resistor Rcs at CS PIN. In CV control,multi-mode operations are utilized to achie™ve high performance and high efficiency. In addition, good load regu←lation is achieved by the built-in cable drop compensation. SP2637AF operates in PFM in ♦CC mode, and it operates in PWM+PFM in CV mode with frequency reduction at light/medium loa d. The chip consumes very low operation current. It ≈achieves less than 75mW standby power to meet all global energy efficiency reg"ulations. SP2637AF offers comprehensive protection coverag‍e with auto-recovery feature including Cycle-by-Cycle current lδimiting, VDD over voltage protection (OVP),FB over voltage protecti↕on,load short circuit protection, VDD under voltage lockout (UVLO), OTP etc. SP2637AF is offered ₽in SOP8 packages.