400W, intermediate bus converter peaks at 96% efficiency

400W, intermediate bus converter peaks at 96% efficiency

New Products |
By Graham Prophet

The module’s five-pin, 1/8-brick footprint is compatible with the Distributed-power Open Standards Alliance’s (DOSA) standard. This combination suits it for intermediate bus conversion in information and communication technologies (ICT) applications. The PKB4413DA employs Ericsson’s hybrid regulated ratio (HRR) technology, which minimises power losses while delivering high-power conversion from a wide range of input voltages, maximising performance in thermally challenging situations. Efficiency can be up to 96% with a 48V input and 12V output at half-load.


Thermal performance ensures that, even in challenging conditions, the PKB4413DA reliably delivers higher usable power in environments with limited airflow or high ambient temperatures. Its tellurium copper pins give excellent thermal transport, while the module is connected to a coldplate or heatsink via a baseplate. The thermal path from the thermally critical components to the baseplate has been carefully designed, resulting in a flat thermal profile for the key elements, along with excellent heat transfer to the heatsink or baseplate.


The PKB4413DA comes in a standard eighth-brick format (58.4 x 22.7 x 13.2mm), is designed to be through-hole mounted and offers 1500V(DC) I/O isolation. It also includes I/O protection and operational features, such as input under-voltage shutdown, monotonic start-up and remote control, as well as output over-voltage, over-temperature and output short-circuit protection. Its calculated MTBF is 8.5 million hours, and the module meets IEC/EN/UL60950-1 safety requirements.


Ericsson Power Modules;



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