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Zetex offers alternative to traditional SOT223-, DPAK-packaged parts

Posted: 21 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:zetex semiconductors? bipolar transistor? zx5t851z npn? zx5t951z pnp?

Zetex Semiconductors disclosed that the efficient high current operation of its latest bipolar transistors meets all the performance requirements of DC motor control. Housed in the SOT89 package, these devices are a more cost-effective alternative to much larger packaged parts, said the company.

With a collector-emitter voltage of 60V, the ZX5T851Z NPN and ZX5T951Z PNP transistors withstand the voltage demands of medium power motor drive circuits. Their high current gain hold-up characteristics accommodate stall currents and the bipolars' low saturation voltages ensure on-state losses are kept to a minimum.

The equivalent on-resistance of the NPN and PNP transistors is 30 m? at 6A and 32 millohms at 5A, respectively. The NPN can handle a continuous current of 5A and a peak current up to 20A. The equivalent figures for the PNP are 4.3A and 15A, and the high gain characteristics of the two devices are specified up to 10A.

The transistors' 4.4-by-4mm PCB footprint and power dissipation capability of 2.1W means these SOT89-packaged bipolars offer a viable alternative to traditional SOT223 and DPAK packaged parts and follow the trend towards cost and space reduction in DC motor drive circuitry, added Zetex.

The ZX5T851Z and ZX5T951Z are priced at 24 cents in 10,000-unit quantities.

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