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125W Hex-Brick DC-DC Operates at 130 Degrees C

electronica 2016

November 2, 2016

Glary Power Technology has again unleashed its patented "Buck-reset Forward" topology up to 500KHz frequency without critical core loss and re-defined regulated dc-dc converter's power density and capability by the newly released E32 series Micro-brick, which will be demonstrated in the next week's 2016 Electronica Munich trade fair, where the unit will be placed in the water – boiled by the unit itself, continuously running for 8 hours of each exhibition date.

Providing single output options including 24V/5A, 12V/10A and 5V/25A from 18- to 36-Vdc or 36- to 75-Vdc input ranges with up to 94% efficiency, E32 series is packaged in the first-in-industry Hex-shape metal case that operates at -60 to +130 degrees C temperature range and solidly reaches 230W/in³ of power density.

Furthermore, even higher power without risking the system reliability can also be obtained with no difficulty. E32 Series utilizes a proprietary wide-band “Droop Current Sharing” control circuit, which allows directly connecting the outputs of modules with no need of any noise sensitive current share bus. The system built by paralleling multiple E32 modules is capable to respond full scale step load within 20μS without evidently overshot and ringing, and further eliminates the risk of triggering the OCP in the power system employed with a low bandwidth current control loop for balancing the modules.

A proprietary ultra-fast current limiting circuit is also embedded in E32 series to eliminate the long existing technical challenge of “Short-Circuit-Current-Runaway”, which is a destructive high output current driven by the minimum output voltage in proportion with the propagation delay flowing through the short circuit loop or the low-impedance non-Ohmic loads. The propagation delay of E32 series with ultra-fast current limiting can be as short as 60nS, effectively shifting the current limit set point higher than that of conventional converters without reliability impact, and makes it even more suitable for powering the non-Ohmic loads.

Not only focusing on the conversion performances, E32 Series is also designed with much better environmental resistances. All the power semiconductor chips are attached onto the inner surface of the low profile metallic case to spread the heat to the outer surface homogeneously, and further result in lower thermal resistance with forced-air cooling. The E32 Micro-bricks can be double-sides attached to external cooling means by using two screws, which provide sufficient mechanical strength for installing E32 module on high temperature and dusty environment with harsh vibration.

The vacuum potted high thermal conductivity silicone helps with heat transfer and maintains hydrostatic pressure balance in the high strength metallic case to withstand pressure range from 1mBar to 100Bar. All the special design efforts devoted in this product effectively simplify system power designs for critical application in extreme environments such as deep water probes, high altitude instruments and other equipment that the other conventional power converters cannot comply to perform.

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