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LED Strobe Duty Cycle & Power Calculator
Estimate LED strobe duty cycle, peak power, average power, average current, and thermal margin for machine vision lighting. This tool is for electrical and thermal checks, not direct brightness prediction.
Input Parameters
Results
Use these results as engineering selection values, then verify with actual lens, camera, PCB, or light-source data as appropriate.
Equations Used
Duty cycle:
Duty = Pulse Width × Frequency
Peak electrical power:
Peak Power = Forward Voltage × Peak Current
Average electrical power:
Average Power = Peak Power × Duty
Average current:
Average Current = Peak Current × Duty
Temperature rise:
Temperature Rise = Average Power × Thermal Resistance
Frequently Asked Questions (FAQ)
Q1: What does this LED strobe power calculator do?
It estimates duty cycle, peak power, average power, average current, and average thermal load for LED strobe operation.
Q2: Does this calculate image brightness?
No. It calculates electrical and thermal quantities. Image brightness also depends on LED optics, distance, aperture, sensor gain, exposure, reflectivity, and wavelength.
Q3: Why is average power important?
Average power is the main driver of thermal rise over time, even when peak current is much higher during short pulses.
Q4: Can peak current exceed continuous current?
Often yes, but only within the LED manufacturer's pulse-current, duty-cycle, pulse-width, and thermal limits.
Q5: What must be checked before production?
Check the LED datasheet pulse rating, driver current limit, thermal path, heatsink, optical safety, and actual temperature.
