New Controller IC Simplifies Ideal Diode Emulation to Raise Efficiency of Reverse Discharge Protection Circuitry

Diodes Incorporated has announced a new diode controller DZDH0401DW that provides high-side rail isolation necessary for reverse current blocking, in systems up to 40V and is optimized for use in cordless power tools and autonomous household/garden appliances (such as smart vacuum cleaners and smart lawnmowers). Moreover, it is also well-suited to other applications, including OR-ing rectifiers used in the hot-swappable and N+1 redundancy power supplies used in data center servers.

This device operates as a differential amplifier and PMOS controller to minimize forward current losses when VIN > VOUT and provide high isolation when VIN < VOUT. The circuit compares the voltage between IN and OUT. By combining the DZDH0401DW with a low on-state resistance MOSFET, designers will benefit from vastly reduced power dissipation, when compared to Schottky diode solutions, particularly in high power applications.

Features

• Max Input Voltage: 40V

• Peak Bias Current: -300mA

• Max Reverse Voltage Protection: 50V

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Applications

• High Side Gate Driving PMOS

• High Side Disconnect Switches

• Battery Discharge Protection

• Emergency Lighting

• Active OR-ing Redundant Power Supplies

Availability and Pricing

The DZDH0401DW diode controller is now available in a SOT363 package (with 2.15mm x 2.1mm x 1mm dimensions). Manufactured in IATF 16949 certified facilities, it has a unit price of $0.106 in 1000-piece quantities.