BMR684 Series DC/DC Converter

Flex Power Module's through-hole mounted BMR684 is targeted at RFPA applications needing a 50 V supply at up to 14 A for gallium nitride (GaN) or laterally diffused MOSFET (LDMOS) power amplifiers. A wide adjustment range of 25 V to 55 V is offered to help system designers achieve the optimum efficiency and linearity of the power amplifier.

The device achieves an impressive 96% efficiency at full load and has a maximum baseplate operating temperature of +100°C. The converter input range is 36 V_DC to 75 V_DC, and a remote control and remote sense functions are included. Input-output isolation is 1500 V_DC, and the device is packaged in the industry-standard quarter-brick format measuring 58.4 mm x 36.8 mm x 12.7 mm (2.3 in x 1.45 in x 0.5 in).

The product is fully protected against input undervoltage, overtemperature, output overvoltage, overcurrent, and short circuits.

The BMR684 includes a PMBus® interface to allow easy monitoring of input and output voltages, output current, and device temperature. The device also allows users to configure many aspects of the device operation, including voltage and current, for improved fault tolerance and optimization of the module’s control loop for stable operation in a wide range of circumstances. Power management features also include configurable soft start/stop, precision delay, and ramp-up, and the product is fully supported by the powerful Flex Power Designer tool.