DC/DC Converters

Load Sharing Module for DC/DC Converters

News Release from: Calex Electronics Ltd
26/03/2008

Calex Electronics Limited announces the Load Share Series of modules which provide a unique plug and play solution for paralleling multiple DC/DC converters. For those who have attempted to parallel DC/DC converters, it is not a simple task. Simply running the output traces in parallel on your PCB generally will result in one DC/DC converter attempting to supply the majority of the output current thus resulting in an overload condition. Due to component tolerances and production variances, the start-up profiles for the same model DC/DC converter may vary. If one converter starts into a full load condition in a parallel circuit prior to the other DC/DC converter module(s) this may result in an over-current condition resulting in system failure.

Calex is the first to offer a truly modular solution significantly simplifying the task of paralleling DC/DC converters for increased current capability and/or power system redundant load sharing. No external circuitry is required with any of the the Calex Load Share models. There are six models in the Series covering 3.3 to 48 Volt nominal input voltages. Maximum output current is 60A. All models achieve 99% efficiency typically and utilize aluminium substrate technology for thermal management.

The Load Share Series utilizes active load sharing with low-side sensing resulting in very accurate load sharing with minimal load regulation issues. The low-side sensing in combination with the differential load share bus communication technology designed into the Load Share module results in a very high level of noise immunity. The Load Share modules also utilize the sense point as the point of regulation which gives the designer the ability to use the DC/DC converter trim function in the system design.

The Load Share models are housed in a 1/4 brick package measuring 2.28 x 1.45 x 0.50H. The baseplate operating temperature is -40 to 100C.