BC, BC, BC High Current Transistors NPN Silicon Features. Base NPN Epitaxial Silicon Transistor Absolute Maximum Ratings Ta=25 C unless otherwise noted Symbol Parameter Value Units VCER Collector-Emitter Voltage at RBE=1K? : BC 45 V: BC 60 V: BC V. BC BC VCEO. Vdc. Collector – Base Voltage. BC BC BC VCBO dimensions section on page 4 of this data sheet. ORDERING. DATA SHEET. Product specification. Supersedes data of Apr Oct DISCRETE SEMICONDUCTORS. BC; BC; BC
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This can be seen as a current booster.
Emitter follower This can be seen as a current booster.
I’m glad you’ve done the calculations, that’s a good start. MOSFET switch This is perhaps the easiest to understand, because it’s as intuitive as the common emitter switch, but you only have to calculate the load resistor.
Sign up using Email and Password. The goal is to drive enough current through the base to make this happen. Just to be clear, your suggested circuit will put way too much current through the LED, and it will be poorly controlled.
Spehro Pefhany k 4 The current gain varies a lot depending on all sorts of things: RodrigoPeetz Yes, no one will blame you or think less of you for assuming that you can use the transistor in the way you wanted.
(PDF) BC637 Datasheet download
The datasheet for the BC shows it as less than mV up to a collector current of mA. ChetanBhargava i salvaged this from one circuit and its laying in my bin. If your board has an unregulated input with a lot of ripple, you can use it directly. I don’t have much experience with electronic components, and I would like to ask someone with more experience than me to check if my calculation is correct.
BC Datasheet, Equivalent, Cross Reference Search. Transistor Catalog
Sign up using Facebook. The transistor will draw the absolute minimum amount of base current necessary to keep the right amount datqsheet current flowing through the collector.
This is a classic mistake. Sign up or log in Sign up using Google.
Look at this spread from the datasheet: The gain of the transistor is not well defined probably between 80 and A forced beta of 20 is usually good. The series resistor at the gate is there to limit the switching current, and the resistor from gate to ground is there to make sure that the gate is not floating while the pin is in a high-impedance state that is, an input or turned off.
It seemed superfluous at the time, but it makes a better answer. Email Required, but never shown. Then you pick a base resistor to make sure the transistor is saturated. If you catasheet to pass at most 20 mA through the collector, aim for 2 mA through the base, and you end up with a base resistor of about 2.
Essentially you’ll use one of these circuits:. This is perhaps the easiest to understand, because it’s as intuitive as the common emitter switch, but you only have to calculate the load resistor.