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  • Voltage regulator

    GP17

    Member

    Updated: Oct 26, 2024
    Views: 1.0K
    Hi friends,

    I have problem to produce 9V from 12V dc supply.. I have tried with 7809 Voltage regulator, but it produces a lot of heating even with heat sink..Is there any other method can be used to provide 9V from 12V? I know, we can use zener diode, but i'm not sure on that. Please help.Thanks in advance.
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Replies

  • Harshad Italiya

    Member • Dec 10, 2010

    Do you have measure your system's Current requirement?
    The voltage drop produces heat for the regulator..

    P=VI.. V= 12-9 = 3Volt and that is not much problematic. now its depend on your system's Current consumption.
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  • shreyasm89

    Member • Dec 20, 2010

    Pretty simple buddy!Since you are using a DC supply use a potential divider network. I trust you know how a resistive potential divider will work.😀
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  • GP17

    Member • Dec 21, 2010

    shreyasm89
    Pretty simple buddy!Since you are using a DC supply use a potential divider network. I trust you know how a resistive potential divider will work.😀
    Thanks for reply friend.....
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  • GP17

    Member • Dec 21, 2010

    godfather
    Do you have measure your system's Current requirement?
    The voltage drop produces heat for the regulator..

    P=VI.. V= 12-9 = 3Volt and that is not much problematic. now its depend on your system's Current consumption.
    below 1amp.Sorry for late reply.
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  • Harshad Italiya

    Member • Dec 22, 2010

    when you are using potential divider network it may be dissipate some heat in Resistor. if there is below 1Amp current then i think its OK no need to be heated this much. are you sure that your current draw is less than 1Amp?
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  • GP17

    Member • Dec 22, 2010

    godfather
    when you are using potential divider network it may be dissipate some heat in Resistor. if there is below 1Amp current then i think its OK no need to be heated this much. are you sure that your current draw is less than 1Amp?
    Yes, brother. Currently I'm working on pt5101 regulator, which output is 1Amp.
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  • Harshad Italiya

    Member • Dec 22, 2010

    GP17
    Yes, brother. Currently I'm working on pt5101 regulator, which output is 1Amp.
    So, Your problem is now solved?
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