MOSFETs reduce heat in servers, notebook PCs

NEC Electronics America developed two MOSFET families. The ?PA273xUT1A family is designed for use in the protection circuitry of Li-ion batteries for notebook PCs and is designed to help prevent heat generation and explosions that may result from Li-ion battery overcurrent. The second, the ?PA272xUT1A family, helps power CPUs and chipsets in notebooks, desktop PCs and servers, and is designed for use in DC/DC converters, or POL converters, which must provide clean and reliable power service to chipsets. All of the MOSFETs are housed in NEC's proprietary 8-pin HVSON package that fits into the industry-standard SOP8 footprint and provides efficient heat dissipation, while allowing the devices to deliver more power than standard SOP8-based solutions.

Fabricated with a 0.25?m process, the MOSFETs have on-resistances ranging from 2 milliohms to 7.7 milliohms in the ?PA272xUT1A family, and from 2.6 milliohms to 3.1 milliohms in the ?PA273xUT1A family. The devices also manage heat dissipation, providing 4.6W of power. Unlike lead-frame packages, which are mounted and then covered with resin, the 8-pin HVSON package prevents heat generation by connecting directly to the board, allowing heat to radiate via an exposed frame without the use of resin. As a result, 4.6W of power is available. Without the need for resin, package height can be reduced to a maximum of 1mm, making it possible for designers to reduce the size of batteries in notebook computers.

Samples are already available. Pricing starts at 50 cents in quantities.

- Emily Gleason
eeProductCenter