AP3302 Quasi-Resonant PWM Controller Diodes Incorporated AP3302 Quasi-Resonant PWM Controller is optimized for high performance and cost effective quick charge applications. The AP3302 provides SUVP protection and operates in Valley lock QR mode to improve system efficiency and EMI performance. The start-up current of this PWM controller is very low. The protection features include brown out protection, cycle-by-cycle current limit, over voltage protection, internal OTP, over load protection, and pins fault protection. The AP3302 Controller is RoHS compliant and free from lead, halogen, and antimony. Applications include switching AC-DC adapter/charger, ATX/BTX auxiliary power, set-top box power supply, and open frame switching power supply.