Digital control improves converter efficiency, enables high power density — Ericsson Power Modules

Digital control improves converter efficiency, enables high power density — Ericsson Power Modules

In the world of dc/dc converters, the quest for greater power, greater efficiency, higher output accuracy, and smaller size continues unabated. Traditional quarter-brick dc/dc converters can achieve up to 300 W with an output accuracy of ±2%, while intermediate bus converters can achieve up to 377 W with an output accuracy of +4/–9% accuracy. Until Ericsson unveiled the BMR453 series digitally controlled dc/dc converter, designers had a difficult time combining higher power/efficiency with high output accuracy.

In an industry first, the dc/dc converter (see Electronic Products , August 2008, p. 76) uses a digital control platform contained within the product module. The converter’s microcontroller sweeps up a large quantity of discrete control and overhead components, resulting in better integration, lower component count, less PCB area, and improved reliability than traditional designs.

The BMR453 dc/dc converter offers 400-W output power, 33-A output current, ±2% accuracy, and 96% efficiency. The converter has an input voltage range of 36 to 75 V, and a variable output voltage from 8.5 to 13.5 V. Its load regulation allows it to be used as an IBC where it directly power devices such as hard-disk drives that cannot tolerate a wide variation in bus voltage.

Ericsson Power Modules , Plano , TX
Keith Merrill 972-583-6910

http://www.ericsson.com/powermodules