SP2637AF is a high per•'↔↕fomance offline PSR powe±≈r switch for low power AC/DC cha§<←rger and adapter applications. It ↑£§¶operates in primary-side sens&πing and regulation.Th¶&₹<us, opto-coupler and TL431 ar "±&e not required. In CC control, the ∑§ε•output current and pΩσower setting can be adjus÷β§ted extemally by the sense¶↑✔• resistor Rcs at CS PIN. λ'"In CV control,multi-§←✘mode operations are utilized to achieveγ  high performance and high efficiency.♦₹$♦ In addition, good load regulation i ←↑≥s achieved by the built-in cable §&©±drop compensation. SP2637AF ope≈©ε"rates in PFM in CC mode, and it op∑<erates in PWM+PFM in CV m€£γ÷ode with frequency reducπε$tion at light/medium load. The chip c$₩•onsumes very low operation c₹∏&urrent. It achieves less than 7≤→✘δ5mW standby power to meet all global☆↔ energy efficiency reguπ↕‌lations. SP2637AF offers λ comprehensive protection coverage $™ with auto-recovery feature inclu•↕←ding Cycle-by-Cycle current limiδ♥ting, VDD over volta™πδge protection (OVP),FB over voltage £≥✔®protection,load short ∞→©circuit protection, VDD under voltage γ•lockout (UVLO), OTP etc. SP2637AF is ₹≈₩offered in SOP8 packages.