When considering a pulsed DC power supply, it is important to understand the peak current, average current and duty cycle. Understanding these terms and how they relate to each other will help with power supply selection and setup. The following explains each and their relationship to each other.
Below is an example of a basic pulsed DC output
Peak Current: The output current the power supply will regulate during the pulse on time
Duty Cycle: = On Time ÷(Time Period)
Average Current: = Peak Current X Duty Cycle
The DC equivalent (effective current) is used for calculating amp minutes and total power.
Frequency: = 1 ÷ (Time Period)
Example:
Average Current: = 1ms ÷ (1ms + 2ms) = .33 Duty Cycle
= 1 Amp X .33s = .333 Amps Average
Frequency: = 1 ÷ 3ms or 1 ÷ .003s = 333Hz