SP2637AF is a high perfomance offline PSR power ♦​switch for low power AC/DC÷♣ charger and adapter applications. It o₩ ¶₹perates in primary-side sensing and re£σ♦gulation.Thus, opto-cou←‍pler and TL431 are not req₽±uired. In CC control, the output current and powe§£✔r setting can be adjusted extemally by the sense¥™< resistor Rcs at CS PIN. In CV control,mul→↕ti-mode operations are utilizeσ"d to achieve high performance and h≥₽igh efficiency. In addition, good load r‌✔↔♦egulation is achieved by the δ πλbuilt-in cable drop compensation. ≤±≤SP2637AF operates in PFM in <÷≥↑CC mode, and it operates in PWM+PFM in₽α‌ CV mode with frequency reduction≤$ at light/medium load. The chip consumes very ε‌"low operation current. It achieves less than 75mW₹< standby power to meet all glo≈₽bal energy efficiency regulations. SP2637AF φλoffers comprehensive protection $≤ coverage with auto-recovery feature including C ↕ycle-by-Cycle current limiting, VD‍<D over voltage protection (OVβ≠★P),FB over voltage protection,load short circu £≥&it protection, VDD under voltage®​ lockout (UVLO), OTP etc∞ . SP2637AF is offered in SOP8 packages.