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Mid-voltage transistors raise circuit power density

Posted: 31 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Zetex? ZXTN2031F? ZXTN2020F? ZXTP25040DFH? bipolar transistors?

Zetex bipolar transistors

Zetex Semiconductors has introduced a range of mid-voltage bipolar transistors in the SOT23 package, capable of handling a power dissipation of up to 1.25W. With the 3-by-2.5mm footprint, the company said these seven NPN and six PNP devices help increase circuit power density by replacing the much larger DPAK, SOT89 and SOT223 packaged parts.

Spanning the collector emitter voltage range from 40- to 100V, the ZXTN and ZXTP bipolars promise high-efficiency switches for lamp, relay and solenoid driving in automotive, industrial and telecom applications. Capable of blocking voltages up to 180V and handling a continuous collector current up to 5A, Zetex said the transistor range will switch loads up to 500W. In addition, pulsed current ratings up to 12A mean that higher capacitance MOSFETs and IGBTs in power supply circuits can be driven at higher speeds.

Lower heat dissipation and cooler running is achieved as a result of the transistors' very low saturation voltage!40mV for the 50V rated ZXTN2031F; while their low equivalent on-resistance!down to 30milliohms for the 100V rated ZXTN2020F!is much lower than that of alternative MOSFETs in the same sized package, the company said.

Also offering a very high gain!a minimum of 300 for the 40V rated ZXTP25040DFH!these bipolar transistors enable ICs to drive larger loads directly, Zetex said, without the need for additional buffering.




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