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Transistors Query!

Discussion in 'General Electronics Discussion' started by junaid ahmad, Aug 14, 2016.

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  1. junaid ahmad

    junaid ahmad

    1
    0
    Aug 14, 2016
    Hello everyone, Can anyone help me with BJT transistor.
    I want to generate Ic current of 0.34A with Vcc=9V, Vin=5V using BC547 but it looks like this transistor has Ic rating of 100mA. If i use BD139 or TIP122 transistor what is the Beta value for these two transistors.
     
  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    A transistor will not generate current, you need a dynamo or alternator:).

    The current gain of transistors is variable over a wide range. You should not use a circuit which depends on it.

    To drop 9V to 5V, use a 7805 regulator which can manage up to 1A and may need a heat sink. Do not forget the output capacitor.
     
  3. Rixen

    Rixen

    98
    23
    Feb 16, 2016
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