Enter the peak-to-peak ripple current, frequency of the ripple, and peak-to-peak ripple voltage into the calculator to determine the capacitance of the decoupling capacitor. This calculator can also evaluate any of the variables given the others are known.
Decoupling Capacitor Formula
The following formula is used to calculate the value of a decoupling capacitor.
C = I / (2 * π * f * Vpp)
Variables:
- C is the capacitance of the decoupling capacitor (Farads)
- I is the peak-to-peak ripple current (Amperes)
- f is the frequency of the ripple (Hertz)
- Vpp is the peak-to-peak ripple voltage (Volts)
To calculate the value of a decoupling capacitor, divide the peak-to-peak ripple current by the product of twice the value of pi, the frequency of the ripple, and the peak-to-peak ripple voltage.
What is a Decoupling Capacitor?
A decoupling capacitor is an electronic component that is used to isolate a part of an electrical circuit from the influence of other parts. It is typically used in digital circuits to prevent sudden changes in the power supply voltage which can cause malfunctions. The decoupling capacitor works by storing energy when the voltage is stable and releasing it when a sudden drop occurs, thus maintaining a constant voltage supply. It essentially acts as a small, local battery within the circuit.
