What if you can't find the vital transistor identity number on the transistor itself? All is not lost you can still find the pin functions by a little detective work. Plan B - Finding The Pin Functions by looking at the transistor package information. In the off chance that you can't find the right information it will be necessary to resort to Plan B.įig.7.3.2 Common Transistor Packages. You also should find a diagram in the datasheet showing the transistor pin connections (pinouts) where the collector, base and emitter pins and any variants are shown. Just type the transistor number in internet search bar and you should find a selection of sites publishing the data you need. The best way to check the functions of the pins is to use the manufacturer's datasheet, just about every transistor ever made has its own datasheet on the Internet. Plan A - Use The Manufacturer's Data Sheet However to do this it is first necessary to find out which pin is which. So to test a transistor you just need to check the forward and reverse resistance of each of these junctions. For the purposes of testing, these can be thought of as simply as two diodes with one common connection i.e. Fig.7.3.1 The Two Diode Transistor Model.Īs shown in Fig.7.3.1 whether a transistor is (a) an NPN type or (b) a PNP type bipolar transistor, it consists of two diode junctions, the base-emitter junction and the base-collector junction.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |