APEC: Synchronous Rectifier Saves Secondary Power

The company said: "ZXGD3113 controls an external MOSFET, such as a 100V16mΩn channel DMT10H015LPS configured as an ideal diode ." "The SOT26 size reduces the size of the industry standard SO8 solution, and by operating at frequencies up to 250kHz, PSU designers can use smaller Transformer. " Proportional gate drive is implemented . Although it can also operate in discontinuous conduction mode and critical conduction mode, it can quickly turn off synchronous mosfet in continuous conduction mode. Other features include a 10mV threshold voltage, which can be used with low RDSDS (on) and mosfets with peak source and sink currents of 0.5A and 1.5A, respectively. The operating voltage range is 3.5V to 40V, allowing the chip to generate voltages as low as 3.5V, and to handle a large number of overvoltage spikes on higher power rails, such as 24V. The quiescent current is 6.3mA.