DIODES Incorporated AC DC Converters, Offline Switches AP3128S-13

The AP3128S-13 is a peak-current control, multi-mode PWM controller designed for offline flyback converters, offering optimized performance and low standby power consumption. It operates in burst mode at no load or light load to minimize power usage and transitions to quasi-resonant (QR) mode under higher loads, incorporating frequency foldback to enhance efficiency and reduce electromagnetic interference (EMI). The maximum switching frequency is approximately 105 kHz, which helps limit switching power loss. This controller includes comprehensive protection features such as brown-out protection, cycle-by-cycle current limiting, VCC overvoltage protection, secondary-side output overvoltage protection, under-voltage protection, and internal over-temperature protection. It is compliant with RoHS standards and is suitable for various applications, including cell phone chargers, power delivery applications, ATX/BTX auxiliary power supplies, set-top box power supplies, and open frame switching power supplies. The device is packaged in a SO-8 (Type A1) format and operates within a temperature range of -40¬8C to +85¬8C.