Power Supplies & LED Drivers
Constant-current and constant-voltage LED drivers compared
Which LED loads suit constant-current drivers and which suit constant-voltage supplies, compared on the same criteria.
| Criterion | Constant-current LED driver | Constant-voltage LED driver |
|---|---|---|
| Regulated output | Current | Voltage |
| Typical output | About 0.35–3.5 A within a 9–56 V DC window | 12, 24 or 48 V DC |
| Typical power | About 10–200 W | About 10–200 W |
| Suits | LED modules in downlights, panels, high-bays and streetlights | LED strips and loads connected in parallel |
| Where current is controlled | In the driver | On the LED board, by resistors or regulators |
| Changing the load | Changes the string voltage; needs review | Possible within the supply's power reserve |
| Input | 100–240 V AC nominal, 50/60 Hz | 100–240 V AC nominal, 50/60 Hz |
| Dimming | 0–10 V, DALI or phase-cut, by variant | PWM, 0–10 V or DALI, by variant |
Typical values follow the LED Drivers page; combined CC+CV outputs for OEM products are covered by CC/CV & Custom Power Supplies. Dimming method, enclosure and thermal limits are confirmed for each application.
Read constant-current and constant-voltage LED drivers, or share the LED module data for a review.
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