220V-5V

249

05:13:37

220V 5V converter without transformer
The formulas for dimension the components should be:
filter capacitor = 30 * Iout (uF)
Suppressor capacitor = 30 * Iout (nF)
R(parallel of supp. cap.) = 220K 1/4 W
R(between 220V and bridge) = 2500 / Iout (ohm)
DZ = zener voltage 1W
The output voltage depens on the zener voltage
The diode bridge can be composed with 4X 1N4007.
THE MAX OUTPUT CURRENT (Iout) MUST BE < 50 mA.

published 10 years ago

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