About This Calculator
This Bridge Rectifier Output Voltage Calculator helps you estimate the peak DC voltage from a standard AC power source after passing through a bridge rectifier circuit. Bridge rectifiers are widely used to convert AC to DC in electronics, battery chargers, and power supplies. This tool considers the effect of diode voltage drops for accurate results.
How It Works
A bridge rectifier converts AC (Alternating Current) to DC (Direct Current) by directing the current through four diodes arranged in a bridge configuration. At any given moment, the current passes through two diodes, each causing a small voltage drop. The output DC peak voltage is calculated by subtracting twice the diode forward voltage drop from the input AC peak voltage.
Where:
- VDC = Peak DC Output Voltage (Volts)
- VAC = Peak AC Input Voltage (Volts)
- Vdiode = Forward Voltage Drop per Diode (Volts)
Frequently Asked Questions
What is the purpose of a bridge rectifier?
It converts AC electricity to DC, providing steady voltage for devices like power supplies, chargers, and electronic circuits.
Why is the DC output voltage lower than the AC peak voltage?
Because the current flows through two diodes in each half-cycle, each causing a forward voltage drop, reducing the output.
What happens if the AC peak voltage is less than twice the diode voltage drop?
No current flows through the rectifier, resulting in zero DC output. The calculator alerts you if this condition occurs.
What is the typical forward voltage drop for diodes?
Silicon diodes usually have a forward voltage drop of around 0.7V, while Schottky diodes have lower drops around 0.2V to 0.4V.
Can I use this calculator for different diode types?
Yes, simply enter the known forward voltage drop for your specific diode to get an accurate DC output voltage result.