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Optoelectronics/Displays??

White LED driver targets LCD backlights

Posted: 22 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:white LED? LED driver? LCD? MOSFET?

SSM3K318T MOSFET driver

Toshiba America Electronic Components Inc. (TAEC) introduces a power MOSFET driver for white LEDs that tips 60V. The driver is suited for white LEDs to be used in high voltage applications such as car navigation monitors and 12-inch notebooks. These applications need about 24V to 48V to activate 8 to 16 white LEDs in series. The Toshiba SSM3K318T n-channel power MOSFET is small in size and well-suited to boost a battery voltage to the level needed to turn on the LED array, with both high speed switching and low ON-resistance (R(DS(ON))) for higher efficiency.

The SSM3K318T features low ON-resistance of 83.5m? (typ.) at V(GS)=10V, and low capacitance of 235 pF at V(DS)=30V. The new device is available in a compact TSM package that measures 2.9mm x 2.8mm x 0.7mm.

"The low R(DS(ON)) and capacitance of these devices increase efficiency and translate into longer battery life for mobile applications using white LEDs as backlights for the display," said Talayeh Saderi, business development engineer, RF and small signal devices, for TAEC.

Toshiba's broad selection of low ON-resistance small signal MOSFETs (S-MOS) is suitable for high-speed switching devices in portable electronics equipment. The MOSFETs feature among the lowest ON-resistance and lowest capacitance in the industry and are designed to save space while meeting designers' requirements.

The Toshiba SSM3K318T white LED driver is available now, with prices in OEM quantities beginning at $0.65/each.





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