Power Electronics

1/8 brick DC/DC Converter Optimized For Power Amps And Cold-Wall Cooling Environments

Ericsson Power Modules' PKB4513PINBLC is a 50W eighth-brick DC/DC converter that powers 12V intermediate bus architectures. Optimized to comply with low height and low-thermal resistance building practices, the PKB4513PINBLC is suitable for a very large ra
nge of applications and systems that use cold-wall cooling technology. This is largely facilitated by its wide input voltage range of 35 to 60V, 2250Vdc input to output isolation, and its application specific mechanical design where all the heat dissipating components are assembled on the top-side. With this latter feature, the converter becomes a homogeneous component with the rest of circuitry, simplifying the thermal interconnection between heat dissipating components and the system cold-wall, without an additional baseplate.

The converter's low profile (8.73mm) makes it suitable for use in chassis with a 10mm inner height. Avoiding adding a baseplate and matching customers' components height results in excellent homogeneity, simplify the assembling process and reducing cost while increasing reliability. Further, by reducing thermal resistance between dissipating components and the cooling plate, the modules' performance is optimized, significantly reducing component stress, resulting in a high MTBF of greater than 1.6 million hours.

Exhibiting versatility, the converters can operate over a wide temperature range of -40 to 120 °C. Output power is 45W, and efficiency is 91.8 % - both figures are maximum. Output current is 4A maximum. To save energy, a large number of outdoor applications are not using fans and forced-air cooling and instead, using cold-wall technology to drain inner dissipated power and heat to an external heatsink cooled by natural convection, or in some cases, water cooling.

In OEM quantities, the PKB4513PINBLC is priced at $23.

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