Power_electronics Features

A New Approach to Circuit Breaker Design Using Silicon Carbide Switches - Nov 21
Mechanical circuit breakers can be low cost with minimal losses, but they operate slowly and wear out. Solid state versions overcome the problems and are becoming increasing viable as replacements at...
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Power Electronics Europe News
125/150W switched mode power supply is compact for high power density
Supplied in a 2.0 x 4.0-inch (50 x 100mm) open frame design, the switch mode power supplies (SMPS) provide 125W under natural convection, and up to 122W in an aluminium case. Under forced air cooling, a constant output of up to 150W is achieved, says the company. To ensure long service life and reliability at this high power density, the company says it overcame a number of design challenges, such as placing the surface mount semiconductors on the board in such a way as to dissipate excess heat through copper surfaces, acting as heatsinks on the board and through an aluminium base plate via heat-conducting pads.

The power supplies operate at input voltages between 90 and 264V AC at temperatures ranging from -30 to 70°C. Modules with 12, 24, and 48V outputs are available. The modules have short-circuit and over-voltage protection and a typical efficiency of 91%.

The modules are suitable for use across the world, and are certified according to IEC/EN/UL 60950-1 as well as the new IEC/EN/UL62368-1 standard. They comply with the RoHS directive and EN55022/24 Class B for EMC. The modules carry a three-year guarantee. Samples are available via the manufacturer’s distribution network.


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