This circuit uses only two diodes and capacitor's working voltage are calculated as follows:
Formulas 1
Cascade Voltage Doubler:
Vc1 = Vmax
Vc2 = 2 x Vmax
Where:
Vc1 and Vc2 are the capacitor's working voltage in volts (V)
Vmax is the peak or maximum value of the input AC voltage in volts (V)
Note: PIV of the diodes are 2 x Vmax (minimum).
