DC2180A: Dual Negative Voltage Ideal Diode - ORing Controller and Monitor

Summary

Demonstration circuit 2180A showcases the LTC4371 dual negative voltage ideal diode-OR controller and monitor, in a -48V, 50A application. Each channel includes two paralleled 2mΩ (Max) MOSFETs for a total dissipation of just 2.5W at full load. Power connections are made by way of 1/4" ring terminals with a cable capacity of 4 AWG.

The LTC4371 is a two-input negative voltage ideal diode-OR controller that drives external N-channel MOSFETs as a low dissipation alternative to Schottky diodes in high power -48V systems. Low power dissipation and voltage loss eliminates the need for heatsinks and reduces PC board area. Power sources can be easily OR'd together to increase total system power and reliability.

The LTC4371 tolerates ±300V transients such as those experienced during lightning-induced surges and input supply short-circuits events. The internal shunt regulator and low 300µA quiescent current allow the use of a large value dropping resistor to protect the supply pin against high voltage transients, while the high impedance drain pins can be similarly protected by high value series resistors without compromising diode operation

Specifications

Manufacturer Analog Devices Inc.
Category Power Management
Sub-Category OR-ing Controllers
Eval Board Part Number 505-DC2180A-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Current Out 50 A
Voltage Out -48 V
Supply Voltage -32 ~ 85 V
Features Fault Indication
Over Voltage Protection
Quiescent Current [Typical] 300 µA
Component Count + Extras 14 + 20
Application / Target Market Computers
Networking
Servers
Telecom
Design Author Linear Technology
Quiescent Current [Maximum] 450 µA
Main I.C. Base Part LTC4371
Date Created By Author 2016-04
Date Added To Library 2018-03

Eval Board

Order a fully assembled board:

Quantity Available: 0

Quantity:

Media