Power Supply Ripple Calculator
Calculate the output ripple voltage of a capacitor-filtered rectifier power supply.
A
µF
Hz
Ripple Voltage (Vpp)
8.333 V
Ripple Voltage (Vrms)2.406 V
Ripple Voltage (Vpp) vs Load Current
Power Supply Ripple
Formula
V_ripple = I_load / (C x f)
Where f is the ripple frequency (120 Hz for full-bridge rectifier on 60 Hz mains). Larger capacitance or lower current reduces ripple.
Example Calculation
1 A load, 1000 uF filter cap, 120 Hz ripple (full-bridge on 60 Hz).
- 01C = 1000 / 1000000 = 0.001 F
- 02V_ripple = 1 / (0.001 x 120) = 8.33 Vpp
- 03V_rms = 8.33 / (2 x 1.732) = 2.406 V
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