Power supply for max 100mW from powerline (none isolated)

Discussion in 'Electrical Engineering' started by Cor Jansen, Jul 7, 2005.

  1. Cor Jansen

    Cor Jansen Guest

    Hello All,

    I need to power a smal circuit (about 3 Volts, 30mA).
    This circuit need to be powered from the powerline (220VAC).
    The circuit need not to be isolated from the powerline.

    I searched the internet for a simple solution for this, but could not
    find it.
    I hope there are special chips that do just this.

    Does anybody has an idea?

    Any help is welcome.

    Thanks and greetings,

    Cor Jansen.
     
    Cor Jansen, Jul 7, 2005
    #1
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  2. Cor Jansen

    Guest

    On Thu, 07 Jul 2005 13:58:53 +0200, Cor Jansen <cor@dapdesignxdotxcom>
    wrote:

    >Hello All,
    >
    >I need to power a smal circuit (about 3 Volts, 30mA).
    >This circuit need to be powered from the powerline (220VAC).
    >The circuit need not to be isolated from the powerline.
    >
    >I searched the internet for a simple solution for this, but could not
    >find it.
    >I hope there are special chips that do just this.
    >
    >Does anybody has an idea?
    >
    >Any help is welcome.
    >
    >Thanks and greetings,
    >
    >Cor Jansen.


    3vDC?
    The simplest solution is a diode and capacitor in series with the line
    in and another capacitor across the load. You can use a zener to limit
    the voltage across the load.
    I have used this for SSRs
     
    , Jul 7, 2005
    #2
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