|Alguien dijo ...|
|Es de importancia para quien desee alcanzar una certeza en su investigación, el saber dudar a tiempo.|
Aristóteles(384 AD - 322 AD).
|Bipolar transistors increase the efficiency and reduce the cost of DC
motor control circuits|
The efficient high current operation of the latest bipolar
transistors from Zetex Semiconductors meets all the performance requirements of DC motor control. Provided in the
SOT89 package they are also a more cost effective alternative to much larger packaged parts.
With a collector-emitter voltage of 60V, the ZXTN2010Z NPN and ZXTP2012Z PNP devices
easily 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 respectively
30mΩ at 6A and 32mΩ at 5A. 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. The high gain characteristics of the two transistors are
specified up to 10A.
The transistors’ 4.4mm x 4.0mm 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 obey the trend towards cost and space reduction in DC motor drive circuitry.
ZXTN2010Z and ZXTP2012Z from Zetex Semiconductors are just two devices from a series of eight new SOT89 packaged
transistors covering a VCEO range from 25V to 140V and meeting the requirements of a range of high current circuits,
including DC motor control, emergency lighting and automotive load driving.
The price of the ZXTN2010Z and
ZXTP2012Z through distributors is $0.24 in 10K piece quantities.
Viernes, 22 Julio, 2005 - 10:59