AP39811 Primary Side Regulated Power Switcher Diodes Inc. AP39811 Primary Side Regulated Power Switcher is integrated with a primary side regulation controller and an integrated N-channel power MOSFET for shaver charger applications. The Diodes Inc. AP39811 offers an easy-to-achieve targeted slant IV curve without an optocoupler and secondary control circuitry. A resistor connected between the FB pin and CPR pin is introduced to adjust the slew rate of the slant IV curve.