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1U-high AC/DC front ends load 2.5kW

Posted: 08 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:power management? AC/DC? switching power supply? Cherokee? power supplies?

CAR2500 series of AC/DC <a href=front ends from Cherokee" ALIGN="RIGHT">

Cherokee International says its CAR2500 series of AC/DC front ends is the industry's first 1U-high, 2,500W supply. Having twice the power of competing 1U units, according to the company, the CAR2500 is designed as a customizable power platform for network routers and switches, enterprise servers, telecommunications equipment and industrial ATE applications.

The CAR2500, measuring 14.25-by-4-by-1.61 inches, delivers 46.3A at -54Vdc (230Vac input). It's also offered in a 48 version and a 12Vdc version will be available shortly to support the most common DPA architectures, both isolated and non-isolated. A standby output provides 1A at 3.3V or 5V to power external housekeeping and monitoring circuitry. Four CAR2500 modules can be mounted side-by-side in a 1U power shelf (ACE254) to provide up to 10kW, or 7.5kW with N+1 redundancy.

An onboard MCU, equipped with a 10bit ADC, facilitates accurate temperature-, current- and voltage-sensing capability. Automatic fan-speed control regulates the internal supply temperature for increased reliability and minimal audible noise. The CAR2500 supports I?C, PMBus, and Ethernet protocols. Basic operational features include hot-swap and fault redundancy, active single-wire load sharing, output voltage programming, current readout, remote on/off and front plate LEDs. Protection features include input under- and overvoltage, output overvoltage, overcurrent and over-temperature circuitry.

The CAR2500 series, rated for operation over -10C to 70C (forced air cooling provided by thermally-controlled fan) and with -40C startup capability that's suited for in-the-field applications, is priced at $399 in OEM volumes. Samples are available. The ACE254 universal rack is priced at $255 each in OEM volumes.

- Vince Biancomano

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