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500V MOSFETs claim 'lowest' on-resistance

Posted: 05 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:power management? MOSFET? CoolMOS? Infineon? HID lighting?

Infineon's CoolMOS CP 500V series MOSFETs, claiming the industry's lowest on-resistance and the fastest switching speed for its type, are particularly suited for high-intensity discharge (HID) lighting, lamp ballast applications and computer servers.

The CoolMOS designs are optimized to overcome the so-called "silicon limit," a characteristic of MOS semiconductors in which a doubling of voltage blocking capability leads to an increase in the on-state resistance by a factor of five. The CoolMOS CP 500V series claims an industry-best figure of merit (on-state resistance times gate charge) of as low as 6.7 ohms-nC, which is an improvement of more than a factor of 2.5 compared to the company's 500V CoolMOS C3 series.

Infineon specifies the MOSFETs' so-called switching speed at 50V per nanosecond, suiting the devices to traditional easy to design, hard-switching power supply topologies versus more complex resonant power supply architectures. Additionally, the CoolMOS CP 500V are low gate-drive devices, thus low-power standard gate drivers and ICs can be used.

Devices in the CoolMOS CP 500V series will be available in all the industry-standard packages. Samples of the first products, including 140-520 milliohm devices in a TO-220 and TO-220FP package, and 140-299 milliohm devices in a D2PAK package, are available now. The unit price for the family's 140 milliohm device in a TO-220 package will be less than $1.35 each for orders of more than 1,000 pieces.

- Vince Biancomano

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