⚡ Constant Current Design Tool
Constant Current Driver Calculator
Design a constant current LED array, verify driver voltage window compatibility, calculate series/parallel string configuration, and check LED junction current and dimming options.
Driver system type
Constant Current
COB LEDs, downlights, LED modules, series strings
Constant Voltage
LED strips, 12V / 24V tape, parallel loads
Application presets
LED specification
From LED datasheet. Typical white LEDs are 2.8–3.6V; COB modules can be 18–54V.
Maximum or nominal current from LED datasheet.
Actual operating current. Lower current improves thermal performance and lifespan.
Junction-to-solder point or module thermal resistance.
Array configuration
Series LEDs share the same current. Voltage adds.
Each string draws the drive current. Current adds.
Driver compatibility
Please enter valid forward voltage, current, and array values.
Driver recommendation
Enter values, then calculate
The result panel will show the recommended driver wattage, output current, voltage compatibility, loading percentage, and warnings.
Recommended driver
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✅
Compatible
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Driver utilization0%
Ideal 70–90%MarginalOverload
0V
String voltage
0W
LED power
0lm
Est. lumens
0°C
Junction temp
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Constant current vs constant voltage
Constant Current
Best for COB LEDs, downlights, and LED modules wired in series. The driver regulates current and allows voltage to float within its output window.
Constant Voltage
Best for LED strip tape and loads with built-in current limiting. The supply holds 12V or 24V while the load determines current draw.
Compatibility warnings
LED array specification
Series / parallel wiring diagram
Dimming compatibility
Matching driver options
LED lifespan estimate vs drive current
Drive currentRelative lifespanEst. L70
Design recommendations
Array configuration
String voltage
Total output current
LED load power
Recommended driver
Thermal estimate
Drive current vs rated