LED Driver Constant Current Source

Constant Current Source(s)

  • Alternative name is LED driver CC => Constant Current
  • A Constant Current Source is an operating unit for LED modules or LEDs, especially power LEDs.
  • We offer a variety of universal LED Constant Current Sources, many of them are easily programmable via dipswitch.
  • Function to control via DALI, 1..10V, push button and phase angle control or trailing edge control (Triac, MosFET) are especially popular.
  • There is a right Constant Current Source for everyone.


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Show 1 to 9 (of in total 28 products)
LED driver Jolly MD PUSH

TCI LED converter 32W

dimmable via "Push-Button" or triac;  350, 500, 550, 700, 750mA const ; 12, 24, 28V const.
TCI 122260

from 30,23 €unit price 37,79 €net: 31,76 €
19 % VAT incl. excl. Shipping costs
LED CC Ballast DALI for 60W from TCI #127413
TOP LED-DALI control unit 60W linear (AM) and PWM dimmable. A new generation of flicker-free led drivers also while dimming. Adjustable currents from 350mA - 1050mA via dip switch.
from 40,17 €unit price 54,98 €net: 46,20 €
19 % VAT incl. excl. Shipping costs
TCI LED Driver Smart 32

LED Driver Smart 32; 32W

TCI 122217 and TCI 122218 - reliable and inexpensive constant current source


from 19,12 €unit price 23,90 €net: 20,08 €
19 % VAT incl. excl. Shipping costs
TCI Sirio 100 Bilevel LED Driver

TCI LED Driver Sirio 100, dimmable via 1...10V and BILEVEL function, 100W; 250, 350, 400, 450, 500, 550, 600, 700mA const.

TCI 127200

from 52,72 €unit price 65,90 €net: 55,38 €
19 % VAT incl. excl. Shipping costs
TCI Maxi Jolly SLIM HV DALI - LED driver

Very slim high voltage LED driver 60W, dimmable via DALI, 1..10V and Push; constant currents: 250, 350, 400, 450, 500, 550, 600, 700mA

TCI 122688

from 44,72 €unit price 55,90 €net: 46,97 €
19 % VAT incl. excl. Shipping costs
TCI 12W 700mA - LED driver

Efficient LED driver with small dimensions to controll up to 5 Power-LEDs

from 12,79 €unit price 15,99 €net: 13,44 €
19 % VAT incl. excl. Shipping costs
TCI Maxi Jolly HV 1...10 V & PUSH - LED driver

High voltage TCI LED driver 50W; constant currents: 250, 350, 400, 450, 500, 550, 600, 700mA; up to 112V max.

TCI 122414

from 40,39 €unit price 50,49 €net: 42,43 €
19 % VAT incl. excl. Shipping costs
TCI Jolly DIN 32 LED Driver for Top Hat Rail

Top hat / DIN rail LED Converter 32W; dimmable via "Push-Button" or 1...10V; constant currents: 200, 250, 300, 350, 400mA

TCI 127100

from 39,92 €unit price 49,90 €net: 41,93 €
19 % VAT incl. excl. Shipping costs
TCI DC Mini Jolly 1...10 V & PUSH - LED driver

TCI DC Mini Jolly

TCI LED driver 20W, small design, dimmable via 1..10V or "Push-Button"; 350mA to 900mA ; 10V, 12V, 24V.

TCI 123400

from 21,04 €unit price 26,30 €net: 22,10 €
19 % VAT incl. excl. Shipping costs
Show 1 to 9 (of in total 28 products)

We are often asked by customers:

"Constant Current Source or Constant Voltage Source?"

Until recently, the main orientation aspect was the voltage. 12V or 24V DC voltage and the current depends on the usage. The power supply unit has to be sufficiently powerful. But now, with the LED as illuminant, we do not anymore connect a load that can be run with constant voltage, e.g. from a battery. Small variations in the voltage result in small changes of the current level.

Constant Current Sources due to LED characteristic curveKonstantstromquelle wegen LED-Kennlinie nötig

LEDs, on the other hand, behave very differently. Their characteristic curve already registers large changes in current for small changes in voltage.
See sketch on the right.

The operation is even unstable if one manages to keep the voltage constant at e.g. 3.3V and maintain a diode current of approx. 350mA. The characteristic curve constantly changes depending on the operating temperature and alternation and scatters from diode to diode. Secure operation is not possible and thermic destruction can occur even with small fluctuations.

Therefore, Constant Current Sources, or LED Drivers, are used. They send a defined and constant current through the LEDs. The voltage measured on the LED is allowed to fluctuate. This ensures reliable operation of the LEDs.

Usual currents for LEDs:

  • LED from the toolbox: approx. 10mA (mostly realised with a series resistor)
  • Low Power LEDs around 100mA
  • Power LEDs with sufficient cooling started with 350mA and now also work with a current of 1A or more.
  • LED arrays or COB are also popular, these are run with over 1A via Constant Current Sources.

Attention. There are LED illuminants, like GU5.3 (MR16 LED radiator) or LED modules that already have an integrated Constant Current Source. They are run conventionally via constant voltage.

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