Digital PoL regulator in compact SIP delivers 80 A

April 29, 2021 // By Jean-Pierre Joosting
Digital PoL regulator in compact SIP delivers 80 A
Digital non-isolated Point of Load regulator saves valuable board space, while being able to deliver up to 80 A output current, with a maximum power output of 198 W.

Flex Power Modules has introduced the BMR474, a high power density, digital non-isolated Point of Load (PoL) regulator. Due to its vertically mounted SIP (Single Inline Package) design, the BMR474 saves valuable board space, while being able to deliver up to 80 A output current, with a maximum power output of 198 W.

Designed for telecom and datacom applications, the BMR474 offers an excellent price to performance ratio, and offer efficiency levels as high as 95.1% at 12 Vin, 3.3 Vout, full load.

The input voltage range is 6 V to 15 V, and the output voltage can be adjusted from 0.6 V to 3.3 V. For output voltages up to 1.8 V, the BMR474 can deliver up to 80 A output current, while for output voltages over 1.8 V the maximum output current is 60 A. Ripple and noise is 5 mV at 12 Vin, 1 Vout, full load.

The SIP module includes power connections optimized for high current minimizing the resistive losses between the power module and the load. While the high efficiency and optimized thermal design provide minimum power derating, an optional heatsink can be added for even more demanding applications.

The BMR474 is easy to set up via its PMBus digital interface, which provides extensive monitoring, configuration and control capabilities. It is also supported by Power Designer software from Flex Power Modules, which makes design and debug simpler. By using the software’s simulation functions, it’s straightforward to optimize the configuration parameters, which means designers can achieve a stable control loop with a fast load transient response.


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