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Digital control is ‘industry first’
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18/06/2008
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Claiming an industry first, Ericsson has launched BMR453 series of dc/dc converters. The devices use an integral digital control platform to improve power density and control.
Marketing director Patrick LeFevre said: “We have had requests from different customers for tighter regulation and higher efficiency. This wasn’t possible with analogue technology in a small package. We explored the analogue possibilities, but have used digital technology.”
Said to achieve 96% efficiency, the BMR453 provides up to 400W or up to 33A with ±2% accuracy. Input voltage can range from 36V to 75V, whilst the output is variable from 8.5 to 13.5V.
A PMBus interface is provided for system connection, bringing new control features. The digital control system allows users with to control, configure and monitor the device, said by Ericsson to be a level of control which has never been available before, and which allows for more intelligent energy management.
A synchronisation facility enables multiple modules to operate at the same frequency to facilitate optimum filter design for quiet running. A ‘power good’ pin operates between active low and active high and is a useful feature for event based programming.
An integral microcontroller sweeps up a lot of discrete control and overhead components, says Ericsson, resulting in better integration, lower component count, less pcb area, and improved reliability.
The device is already being used by Ericsson in a MicroTCA power module, pictured.
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Author
Graham Pitcher
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