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TI rolls surface-mount 40A multiphase power module

Posted: 25 Jun 2002 ?? ?Print Version ?Bookmark and Share

Keywords:pt8100? pt8120? Excalibur? multiphase power module? dc/dc converter?

Texas Instruments Inc. has unveiled the PT8100 and PT8120claimed to be the industry's first surface-mount 40A multiphase power modulesdesigned to provide low-voltage, high-current power solutions for the multiprocessor and high-end computing applications, such as workstations, servers and other large systems that employ multiple microprocessors, DSPs, ASICs or FPGAs.

The multiphase technology employed in these converters splits the device power path into two discrete, but linked, phase-shifted regulation paths, effectively doubling the switching frequency. The company claims that this reduces I/O ripple and increases transient response when compared to single-phase converters.

Operating at >90 percent conversion efficiency, the PT8100 and PT8120 are available with output voltages that are 5-bit programmable from 3.5V down to 0.8V with versions available that are compatible with VRM specifications 8.4, 8.5, and 9.0.

The PT8100 operates from either a 3.3V or 5V input bus and provide 40A, while the PT8120 operates from a 12V input bus and provide 30A. They function over the temperature range of -400C to 850C and provide a transient response of 15A/5s with a 50 percent load step.

Both are packaged in the company's 31-pin Excalibur cases, eliminating the need for an external heatsink while providing increased shock and vibration resistance, as well as EMI reduction. They also incorporate protection features, including short-circuit and over-temperature protection, and provide output inhibit (on/off), remote sense, and soft-start functions.

The surface-mount modules are offered in vertical or horizontal through-hole styles, and are priced at $47.75 each in quantities of 1,000.

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