SP2637AF is a high perfomance offline PSR power switch∏ for low power AC/DC charger and adapter applications. It opera tes in primary-side sensing and regulation.Thus, oΩpto-coupler and TL431 are not required. In CC control, the output current and power s±etting can be adjusted extemally by the sense resistor Rcs at CS PIN. In CV control,multi-mode op♣erations 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 PFM in CC mode, and it operate¶s in PWM+PFM in CV mode with frequency reduction at light/medium loaλd. The chip consumes very low operation current. It a∞chieves less than 75mW standby power to meet all global energy efficiency regula±tions. SP2637AF offers comprehensive protection cov​erage with auto-recovery feature including Cycle-by-Cycle current limiting, VDD over voltage p∏rotection (OVP),FB over voltage protection,load short circuit protection, VDD under voltage lo¥ckout (UVLO), OTP etc. SP2637AF is offered in SOP8 packages.