Ericsson launches digitally-controlled regulator

The BMR450 digitally-controlled voltage regulator from Ericsson Power Modules uses a highly integrated digital PWM controller to outperform analogue-based solutions.

The BMR450 is a non-isolated voltage regulator rated at 20A and has a high current density of 7.38A/cm3 (120A/in3).

For a similar in/out performance, an analogue voltage regulator would offer a much-reduced figure of 2.37A/cm3 (43A/in3).

The product is aimed at, but not limited to, information and communication technology equipment where system architects are optimising board designs for control and reduced power consumption.

Compared to existing products, Ericsson's BMR450 offers a high level of monitoring functions (read-back data) through the open standard interface, PMbus.

Having access to strategic information such as load current, load status and temperature through PMbus makes it possible to monitor down to core functions level, without adding external components or circuitry.

The BMR450 features a wide input voltage range from 4.5V to 14V making it able to operate under most of the common intermediate bus voltages, for example, 5V, 8V and 12V.

The output voltage range is adjustable from 0.7V to 5V, with an output current of 20A providing up to 100W of power.

Offering high efficiency - typically 96.8 per cent at half load, 5V in, 3.3V out, the BMR450 has a package size of 25.65 x 12.9 x 8.2mm (1.01 x 0.51 x 0.323in).

Having a digital controller, customers can buy tailor-made preset modules that perfectly fit their requirements.

The BMR450 features a complete range of standard functions such as remote on/off, over-temperature protection, output over-current/over-voltage protection, input under-voltage protection, and remote control monitoring that can be used for redundancy control.

It has a high MTBF of five million hours.

The BMR450 has a unique serial number that relates to its chipset.

This offers a high level of traceability, as well as simplifying on-board part identification when performing board diagnostics during the full lifetime of the final equipment.

Technologies employed by the BMR450 include digital PWM associated with the most recent components such as ultra-low resistance Mosfet's, new ferrites, and PCB layout optimisation.

In this respect the BMR450 introduces a new layout concept, Digital Point of Load interconnect (Dipol connect), reducing power losses within the unit and in interconnections to end-user boards.

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