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  1. #1
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    Regulated power supply

    I need to design a regulated power supply using transistor capable of providing 5 volts at 1 A.What should be the parameters for the same?

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    Re: Regulated power supply

    Hmm.. Why do you want to use a transistor?? This specs is exactly met by the 7805 chip.. Use one.. It provides upto 1Amp at +5V and you can use 7905 if you want -5 V



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    Re: Regulated power supply

    I know that 7805 can be used for this purpose, but i need to design using transistor.Please tell me how to do this.



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  4. #4
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    Re: Regulated power supply

    One option to generate 5V is to use 5.6V zener diode and NPN transistor ..
    Here:
    http://www.satcure-focus.com/tutor/page5.htm
    you will find detailed description of this simple voltage regulator ..

    Regards,
    IanP



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    Re: Regulated power supply

    Why dont u use LM317 in fixed resistance configuration.

    It will work for your requirement



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  6. #6
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    Re: Regulated power supply

    do you want to go with series regulator or parallel one?



  7. #7
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    Re: Regulated power supply

    Transistor usage is not necessary... because power transistor is bulky.. u can provide foldback , if u want to save power under short circuit stages.

    depending on the load speed, the feed back system will be decided. I mean speed and bandwidth of the feedback op amp....



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