Toshiba DTMOS II family of 600V power MOSFETs

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Toshiba DTMOS II family of 600V power MOSFETs

These use superjunction structure to increase power efficiency

Thursday, September 04, 2008

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IRVINE, USA: Toshiba America Electronic Components Inc. (TAEC) announced a family of 600V DTMOS II superjunction MOSFETs that contribute to higher efficiency of switched-mode power supplies, such as AC adapters in notebook and desktop computers, servers, flat panel displays, and ballasts used in lighting, due to lower on-state resistance (R(DS)(ON)) and faster switching characteristics.

Developed by Toshiba Corp., the DTMOS II MOSFETs employ a superjunction structure that enables a reduction in both on-state resistance (R(DS)(ON)) and gate charge (Q(g)), which usually are tradeoffs. Typically, when either of these characteristics is reduced, the other increases, but with its superjunction DTMOS II design, Toshiba has been able to reduce both simultaneously, enabling higher power efficiency and switching performance than conventional MOSFETs.

In these devices, Toshiba refined the superjunction structure with the company's second generation DTMOS technology. By applying this design and optimizing the entire device, Toshiba has achieved figure of merit values for (R(DS)(ON) x (Q(g))) that are approximately 68 percent less than that of conventional Toshiba MOSFETs. This figure of merit is one important performance index for MOSFETs in which smaller is better, and is indicative of higher switching performance and power efficiency.

The first 12 products in the DTMOS II family include 12A, 15A, and 20A 600V MOSFETs, each offered in a choice of four packages, including TO-3P(N), TO-220SIS, TO-220(W) and TFP, a compact surface mount package. The 12A devices feature low on-resistance of 0.4 ohm (max.), the 15A devices feature on-resistance of 0.3 ohm (max.) and 20A devices have on-resistance rated at 0.19 ohm (max.).

"With a combination of low on-resistance, fast switching and ruggedness, our new DTMOS II devices are ideally suited for the switched-mode power supply and ballast lighting markets and are expected to enable a significant increase in power efficiency," said Jeff Lo, business development manager, Discrete Power Devices, for TAEC.

©CIOL Bureau

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