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Artesyn POL converters power Intel CPUs

Posted: 30 Apr 2003 ?? ?Print Version ?Bookmark and Share

Keywords:artesyn technologies? nxi150? nxi100? pol converter? pol dc converter?

Artesyn Technologies Inc. has launched a pair of high-current, point-of-load (POL) dc/dc converters for powering Intel's Xeon and Pentium 4 processors.

Available in PCB-pluggable forms, the converters are compliant with the latest VRM9.1 specifications, and deliver up to 75A continuous current and 81A peak current at a user-programmable voltage from 1.1V to 1.85V using standard 5-bit voltage ID codes. Both operate from a nominal 12V input.

The NXI150 and NXI100 employ multiphase synchronous rectification techniques, with interleaving to achieve an effective switching frequency of 1MHz, maximize power conversion performance, and ensure fast transient response. The converters have typical efficiencies of 85 percent to 87 percent, and accommodate load transients of up to 50A/?s with full recovery in <50?s.

Multiple converters can be paralleled for very high current applications, using an active current sharing circuit to maintain current balance under both static and dynamic load conditions.

The converters have no minimum load requirement and are protected against undervoltage and short circuit conditions. An enhanced 'power good' feature improves system reliability by monitoring the output voltage and each phase of the converter for correct operation, and differential remote sense facilities are provided for improved load regulation. In addition, they offer a remote on/off facility.

When mounted on a motherboard, the NXI150 occupies <14.19mm? and has a profile of 6.6cm, while the NXI100 occupies <20.65cm? and has a profile of 2.9cm. They are screened for operation over the 0C to 60C temperature range.

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