The APR34709SP-13 is an AC/DC synchronous rectification controller manufactured by Diodes Incorporated. It is designed to provide a low cost solution for synchronous rectification in flyback power supplies of up to 25W. The APR34709SP-13 comes in a thermally efficient 8-pin SOIC package. It features high efficiency, protection from over-voltage, over-temperature, and over-current, and is RoHS compliant. The APR34709SP-13 operates on an input voltage of 4.5V to 70V, with an output voltage of up to 25V, and a maximum current output of 4A. It also features a frequency range of 65kHz to 600kHz, and frequency sync of either an external clock or the internal oscillator.