Skip to main content

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

DZDH0401DW Diode Controller IC
DZDH0401DW Diode Controller IC

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.



  • Max Input Voltage: 40V

  • Peak Bias Current: -300mA

  • Max Reverse Voltage Protection: 50V

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



  • 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.

Component Datasheet

Related Post


Join 20K+subscribers

We will never spam you.

* indicates required

Be a part of our ever growing community.