Fan-Cooled Power Supply

Jun 3, 2003 12:00 PM, Edited by PETech Staff

Astec Power’s new LPQ142-CF top fan-cooled version of its LPQ142 power supply provides forced air required for continuous operation at the unit's 145W output power rating. With user adjustability on three of its four output voltages, one with a range of 3.3V to 25V, this power supply is suitable for any low profile application that requires tightly regulated and low-output ripple on four dc outputs. Active power factor correction enables compliance with EN61000-3-2 requirements for input current harmonic content. The unit's wide universal input voltage range (85Vac to 264Vac and 120Vdc to 300Vdc) and frequency range (47 Hz to 63 Hz) transcend international borders.

Boasting 3.45W per cubic inch, the LPQ142-CF is ideal for designers who need a robust plug-and-play solution for applications such as remote networking, single-board computing, and high-speed Ethernet. With 75% efficiency at full load, the LPQ142 has single-wire current sharing on the main output that is adjustable from 3.3V to 5.5V. The forced-air cooling enables the device to provide full rated output power while operating within an ambient temperature range of 0°C to 50°C. The LPQ142-CF can continue to deliver power between 50°C and 70°C, as long as the maximum power drawn from the unit is de-rated by 2.5% per °C of ambient temperature above 50°C.