Diodes Incorporated DZDH0401DW Ideal Diode Controller

Diodes Incorporated DZDH0401DW Ideal Diode Controller is designed to drive a p-channel enhancement MOSFET configured as an ideal diode. This controller operates as a differential amplifier and PMOS controller to minimize forward current losses when V_IN > V_OUT. The DZDH0401DW controller provides high isolation when V_IN < V_OUT. This controller compares the voltage between input and output, and if the differential is greater than ~34mV (typical), VBIAS will fall, and PMOS will turn on. If the differential is less than ~70mV, VBIAS will rise, and the PMOS will turn off, isolating the input from the output. The DZDH0401DW controller offers 40V maximum input voltage, -300mA peak bias current, and 50V maximum reverse voltage protection and comes in a SOT363 package. Typical applications include high-side gate driving PMOS, high-side disconnect switch, battery discharge protection, emergency lighting, and active OR’ing redundant power supplies.