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Toshiba Adds Low On-State Resistance MOSFETs for Secondary Stage of Switched Mode Power Supplies

Posted on: Wednesday, 25 March 2009, 12:20 CDT

75V and 100V MOSFETs Optimized for Use in SMPS to Reduce Power Loss and Increase Efficiency

IRVINE, Calif., March 25 /PRNewswire/ -- Toshiba America Electronic Components, Inc. (TAEC)*, a committed leader that collaborates with technology companies to create breakthrough designs, today introduced a new series of MOSFETs for synchronous rectification in the secondary stage of switched mode power supplies (SMPS). Four new devices, developed by Toshiba Corp. (Toshiba), are optimized with low on-state resistance (R(DS)(ON)) to reduce power loss in the secondary stage of SMPS.

The first four MOSFETs in this product lineup are targeted for use in AC power adapters or AC-DC power supplies in computing, and consumer electronics applications. Three 75V devices and one 100V device can each be used as either the switch or synchronous MOSFET in the secondary stage of a SMPS. (Please see accompanying block diagram, available at http://www.toshiba.com/taec/news/press_releases/2009/power_09_558.jsp.)

"In loss simulation testing, Toshiba found that the R(DS)(ON) in a secondary stage MOSFET is the most critical factor related to power loss, typically accounting for 50 to 70 percent of the loss," said Jeff Lo, business development manager, Discrete Power Devices, for TAEC. "As a result, Toshiba developed these low R(DS)(ON) devices to improve power efficiency.

Three 75V devices provide a choice of current rating, R(DS)(ON) and packaging. The TK40A08K3 has a current rating of 40A with R(DS)(ON) (typ.) of 7.0 m ohm, and is offered in a TO-220SIS package (TO-220F isolated). The TK80A08K3 has a current rating of 80A, R(DS)(ON) (typ.) of 3.6m ohm and is offered in a TO-220SIS package. The 75V, 80A TK80D08K3 has similar electrical characteristics to the TK80A08K3, but is offered in a non-isolated TO-220(W) package (TO-220AB).

The fourth new MOSFET, TK40A10K3, is a 100V, 40A device with R(DS)(ON) (typ.) of 11.5 m ohm, and is offered in a TO-220SIS package.

Technical Specifications Gate R(DS)(ON) Maximum Charge(1) (m ohm) Product Rating (typ.) @V(GS)=10.0V Number Application V(DSS) I(D) Q(g) Package Process (V) (A) (nC) Typ. Max. TK40A08K3 Secondary 75 40 80 TO-220SIS 7.0 9.0 TK80A08K3 Stage 75 80 175 TO-220SIS 3.6 4.5 U-MOS IV TK80D08K3 MOSFET 75 80 175 TO-220(W) 3.6 4.5 TK40A10K3 in SMPS 100 40 85 TO-220SIS 11.5 15.0

Pricing and Availability

Samples and mass production of the new Toshiba UMOS IV MOSFETs for synchronous rectification in SMPS are available now. Prices in sample quantities start at $0.80.

Toshiba's Discrete Products

Since 1986, Toshiba Corp. has ranked as the top discrete supplier on a worldwide basis, based on annual revenue from international shipments of total discrete products. According to the most recent annual report from market research firm Gartner Dataquest (San Jose, CA), Toshiba remained the top discrete semiconductor supplier. (Source: "2007 Worldwide Semiconductor Market Share Report," Gartner, April 2008). More specifically, Toshiba is a leading supplier in a number of discrete product categories, including power transistors, rectifiers, LMOS logic, CMOS logic, photocouplers, TOSLINKs, LEDs, small signal diodes and transistors. The company's discrete devices are designed to meet the growing demand for high-performance and lower voltages in today's wireless telecommunications and consumer electronics applications, while emphasizing its strength in the automotive and industrial markets.

*About TAEC and Toshiba Corp.

Through proven commitment, lasting relationships and advanced, reliable electronic components, Toshiba enables its customers to create market-leading designs. Toshiba is the heartbeat within product breakthroughs from OEMs, ODMs, CMs, distributions and fabless chip companies worldwide. A committed electronic components leader, Toshiba designs and manufactures high-quality flash memory-based storage solutions, discrete devices, displays, advanced materials, medical tubes, custom SoCs/ASICs, digital multimedia and imaging products, microcontrollers and wireless components that make possible today's leading cell phones, MP3 players, cameras, medical devices, automotive electronics and more.

Toshiba America Electronic Components, Inc. is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, Japan's largest semiconductor manufacturer and the world's third largest semiconductor manufacturer (Gartner, Preliminary 2008 WW Semiconductor Revenue, Dec. 2008). For additional company and product information, please visit http://www.toshiba.com/taec/.

Information in this press release, including product pricing and specifications, content of services and contact information, is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable Toshiba product specifications. In developing designs, please ensure that Toshiba products are used within specified operating ranges as set forth in the most recent Toshiba product specifications and the information set forth in Toshiba's "Handling Guide for Semiconductor Devices," or "Toshiba Semiconductor Reliability Handbook." This information is available at http://www.chips.toshiba.com, or from your TAEC representative.

Editors Note: Reader inquiries please publish: Tech.Questions@taec.toshiba.com.

Photos available for download at http://www.toshiba.com/taec/news/press_releases/2009/power_09_558.jsp

(1)Qg @ V(DD) = 60V, V(GS)= 10V, I(D) = 40A for the TK40A08K3 @ V(DD) = 60V, V(GS)= 10V, I(D) = 80A for the TK80A08K3 @ V(DD) = 60V, V(GS)= 10V, I(D) = 80A for the TK80D08K3 @ V(DD) = 80V, V(GS)= 10V, I(D) = 40A for the TK40A10K3

SOURCE Toshiba America Electronic Components, Inc.

Source: PR Newswire

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