Calex Electronics is announcing the Load Share Series of plug-and-play modules for paralleling multiple DC/DC converters. Simply running the output traces in parallel on a PCB generally results in one DC/DC converter attempting to supply the majority of the output current, thus creating 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 leading to system failure.
Calex's modular product simplifies 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 Calex Load Share models. There are six models in the series covering 3.3-48V nominal input voltages. The maximum output current is 60A. All models typically achieve 99 per cent efficiency and utilise aluminium substrate technology for thermal management.
The Load Share series uses active load sharing with low-side sensing for accurate load sharing with minimal load regulation issues. The low-side sensing and the differential load share bus communication technology designed into the Load Share module provide a very high level of noise immunity. The Load Share modules also refer to the sense point as the point of regulation, which means that the DC/DC converter trim function can be used in the system design.
The Load Share models are housed in a quarter-brick package measuring 2.28in x 1.45in x 0.50in. The base plate operating temperature is -40 to +100degC.
