SP2637AF is a high perfomance offline PSR power switch for low power AC/DC charger an‍d adapter applications. It operates in primary-side sens​ing and regulation.Thus, opto-coupler and TL431 are not requir♣ed. In CC control, the output current and power setting can φbe adjusted extemally by the sense resistor Rcs at CS PIN. In CV control,multi-mode operat←ions are utilized to achieve high performance and high eff≤iciency. In addition, good load regulation is achieved by the≠ built-in cable drop compensation. SP2637AF operates in P₽FM in CC mode, and it operates in PWM+PFM in CV mod≈e with frequency reduction at light/medium load. T≠he chip consumes very low operation current. It achieves less than 7>5mW standby power to meet all global energy efficiency regulatio®ns. SP2637AF offers comprehensive protection coverage ★with auto-recovery feature including Cycle-by-Cycle current limiting, VDD over voltage prote€ction (OVP),FB over voltage protection,load short circuit protection, VDD under voltage l≠ockout (UVLO), OTP etc. SP2637AF is offered in SOP8 packages.