PWM Voltage Calculator

Calculate PWM (Pulse Width Modulation) parameters including duty cycle, average voltage, RMS voltage, and timing values for PWM circuits and motor control applications.

PWM Waveform

Vcc

Vavg

Ton

Toff

T (Period)

Calculation Method

From Duty Cycle From Target Voltage From Timing Values

Duty Cycle Method

Supply Voltage

Duty Cycle

PWM Frequency

About PWM (Pulse Width Modulation)

PWM is a technique used to control the average power delivered to a load by varying the width of pulses in a periodic signal. It's widely used in motor control, LED dimming, and power supplies.

Key Advantages:

High Efficiency: Switching devices operate in saturation/cutoff
Precise Control: Digital control of analog quantities
Low Heat Generation: Minimal power loss in switches
Wide Control Range: 0-100% duty cycle control

Important Parameters:

Duty Cycle: Percentage of time signal is high
Frequency: Rate of PWM switching (affects filtering)
Resolution: Smallest duty cycle step (depends on timer)
Dead Time: Safety gap in complementary PWM

Design Considerations:

Choose frequency based on application requirements
Consider switching losses at high frequencies
Add filtering for smooth DC output when needed
Ensure adequate gate drive for power switches