Low loss 3-phase suitable diode bridge rectifier reduces heat

Posted By : Jordan Mulcare
Low loss 3-phase suitable diode bridge rectifier reduces heat

Linear Technology Corporation announces the availability of a low loss 3-phase suitable diode bridge rectifier reference design, demonstrated on evaluation board DC2465. Conventional 3-phase rectifiers employ six diodes, but the diodes drop voltage and dissipate significant power at just a few amperes of load current. This requires costly heat sinking and active cooling solutions that complicate thermal design and increase solution size.

The DC2465 design replaces the six diodes with three LT4320 suitable diode bridge controllers, driving six low loss N-channel MOSFETs, dramatically reducing power and voltage losses. This enables the overall system to be specified to operate with a smaller, more cost-effective power supply due to the enhanced power efficiency. Low voltage applications benefit from the extra margin afforded by saving the two diode drops inherent in diode bridges. Compared to traditional approaches, the MOSFET bridge enables a rectifier design that is highly space- and power-efficient.

The DC2465 board rectifies line-to-line AC voltages from 9VRMS to 48VRMS with frequencies up to 400Hz while sourcing a load of up to 25A without forced airflow. Efficiency at 9V input is raised from 84% for a diode bridge to 97% for the active bridge.

The DC2465 evaluation board is available, priced at $125.00 each. The LT4320 suitable diode bridge controller IC is offered in 8-pin MSOP, PDIP, and 3x3mm DFN packages.

Downloads


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Vietnam International Defense & Security Exhibition 2020
4th March 2020
Vietnam National Convention Center, Hanoi
The Sensor Show 2020
16th June 2020
Germany Messe Munich