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T-Cube High Power LED Driver

  • LED Current up to 1200 mA
  • Modulation up to 5 kHz
  • Trigger Mode up to 1 kHz
  • Adjustable LED Current Limit


Power Supply
Sold Separately

Application Idea

Multiple High-Power LEDs
and Drivers Being Used
in the Same Application

Related Items

LED Controller Selection Guide
TypeMax Number
of LEDs
Compact T-Cube Driver11.2 A0 - 5 kHzNo
12 A0 - 100 kHzYes
11 A0 - 100 kHzYes
41 A0 - 100 kHzYes
  • The FLIM LED Driver is only compatible with our FLIM LEDs and is sold with them as a kit. It offers an additional internal high frequency modulation mode for 10 to 100 MHz (sine wave).
T-Cube Light Source & Driver Modules
Laser Diode Driver
Laser Sources
High Power LED Driver

Click to Enlarge

Back View of the LEDD1B T-Cube. For more information, please see the Pin Diagrams tab.

Click to Enlarge

Top View of the LEDD1B T-Cube


  • Easy-to-Use LED Driver
  • 3 Operation Modes:
    • Constant Current Mode
    • Modulation Mode
    • Trigger Mode
  • Compact Footprint Measuring 60 mm x 60 mm x 47 mm (2.4" x 2.4" x 1.8")
  • Pulse Width and Frequency Control via External 0-5 V Signal
  • Adjustable LED Current Limit
  • Includes One CAB-LEDD1 Cable (Additional Cables Available Separately Below)

The LEDD1B driver is designed to drive high-power LEDs with currents up to 1200 mA. It features an adjustable LED current limit to protect the connected LED. The output current can be limited continuously from 200 mA to 1.2 A using the adjuster on the front of the unit (shown below), thereby ensuring the output current does not exceed the limit regardless of the other settings or the modulation input voltage.

Current Limit Adjuster

The LEDD1B is compatible with our high-power LEDs, which are available in collimated, uncollimated, PCB-mounted, and fiber-coupledversions. It is also compatible with select unmounted LEDs offered by Thorlabs for which the maximum forward DC current is higher than 200 mA. When driving these LEDs, care must be taken to ensure the LEDD1B current limit (adjuster shown to the left) is set at or below the LED's maximum forward DC current rating.

The LEDD1B driver offers three operation modes: constant current mode, trigger mode, and modulation mode. The trigger and modulation modes are controlled by an external voltage in the 0 to 5 V range. When in the modulation mode, the LED current output exactly follows the amplitude and waveform of the input signal independent of the knob settings on the top of the T-Cube control unit. In trigger mode the output current switches to the level that has been selected by the knob on the top of module as soon as a threshold voltage is reached. This can be used for pulse width modulation (PWM). The threshold voltage is fixed and cannot be changed by the user. The operation mode can be changed by a switch next to the current selector knob.

This LED Driver has the same compact form factor as other T-Cube modules, and thus, it integrates well into the platform. It is shipped attached to a removable base plate, which allows the T-Cube to be easily secured to an optical table. To attach the LEDD1B unit to a T-Cube controller hub, the base plate must be removed to reveal the T-Cube hub connector. Although the T-Cube hub can be used to power the LEDD1B, this driver does not support remote operations via the USB 2.0 hub interface.

Multi-LED Source
A customizable multi-LED source, such as that featured in the Application Idea above, may be constructed using our mounted high-power LEDs and other Thorlabs items. This source may be configured for integration with Thorlabs' flexible SM1 Lens Tube Systems, 30 mm Cage Systems, and microscope adapters. Please see our mounted high-power LEDs presentation for a detailed item list and instructions.

Thorlabs also offers integrated, user-configurable 4-Wavelength High-Power LED Sources.


The LEDD1B is designed for high brightness LEDs only. The LED current limit has to be adjusted by the trim pot on the front of the unit so that the maximum current of the connected LED will not be exceeded. The available range for this limit is 200 to 1200 mA.

Click to Enlarge

TCH002USB Controller Hub (Power Supply Not Shown)
with Installed T-Cube Modules

Power Supply Options

The preferred power supply (i.e., single channel, multi-channel, or hub-based) depends on the end user's application and whether you already own compatible power supplies. To that end and in keeping with Thorlabs' green initiative, we do not ship these units bundled with a power supply. This avoids the cost and inconvenience of receiving an unwanted single channel supply if a multi-channel or hub-based system would be more appropriate. The power supply options compatible with the LEDD1 LED Driver are listed in the table below.

Operation of LEDD1B
(T-Cube USB LED Driver)
Power Supply
Standalone / Single Channel OperationTPS001 (15 V Power Supply for a Single T-Cube)
System / Multi-Channel OperationTCH002 USB Controller Hub (Power Supply Only)
Common Data
Output Current Range0 - 1200 mA
LED Current Limit Set Point Range200 - 1200 mA
LED Forward Voltage11 V (Min)
12 V (Typical)
Current Ripple8 mA
Current Ripple Frequency570 kHz
Modulation Modea
Frequency Range0 - 5 kHz, Sine Wave
Modulation FormArbitrary
Input Voltage Rate0 - 5 V
Slew Rate13.6 mA/µs
Decay Rate13.1 mA/µs
Trigger Modea
Frequency Range0 - 1 kHz
Duty Cycle Range20 - 80% @ 1 kHz
2 - 98% @ 100 Hz
0.2 - 99.8% @ 10 Hz
Modulation FormSquare Wave / PWM
Logic Input LevelsTTL
Min H-Level: 2 V
Max L-Level: 0.55 V
Slew Rate18 mA/µs
Rise Time51 µs
Decay Rate12 mA/µs
Fall Time79 µs
General Data
Power Supply15 VDC
Maximum Power Consumption15 VA
Operating Temperature0 - 40 °C
Storage Temperature-40 to 70 °C
Weight240 g
Dimensions (W x H x D)60 mm x 73 mm x 104 mm
  • Specifications for the modulation and trigger modes depend on the forward voltage and capacitance of the connected LED.

All the technical data is valid at 23 ± 5 °C and 45 ± 15% relative humidity.

LED Connector - Female

PINout details for LED connector

1LED Anode
2LED Cathode

Modulation In

BNC Female

BNC Female

0 to 5 V external LED control.

Click the Support Documentation icon document icon or Part Number below to view the available support documentation
Part NumberProduct Description
CAB-LEDD1 Support Documentation CAB-LEDD1:LED Connection Cable, 2 m, M8 Connector, 4 Wires
LEDD1B Support Documentation LEDD1B:T-Cube LED Driver, 1200 mA Max Drive Current (Power Supply Not Included)
TCH002 Support Documentation TCH002:T-Cube Controller Hub and Power Supply Unit
Part NumberProduct Description
TPS001 Support Documentation TPS001:15 V Power Supply Unit for a Single T-Cube
TPS008 Support Documentation TPS008:15 V Power Supply Unit for up to 8 T-Cubes

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Posted Comments:
Posted Date:2014-06-27 07:18:34.0
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. The LEDD1B is a current source which delivers a max output current of 1200mA. You can operate any LED with a forward voltage smaller than 11V with this controller so your LED with 3V will work fine. But you have to take care to set the current limit properly to avoid damaging your LED. Use of LEDs with a forward current lower than 200mA could also result in damage to the LED.
Posted Date:2014-06-24 17:28:21.56
Can this T-cube driver be used to supply the single LED with forward voltage of 3 V? In the Spec the LED Forward Voltage of 12 V is mentioned.
Posted Date:2014-03-28 08:16:27.0
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. We can provide different kinds of drivers. The LEDD1B is a switching driver and shows ripple in the output current which can be as high as 20%. The DC4100 is a linear driver and the main advantages of such a driver is low output current ripple and its EMC compatibility. These drivers are applicable for fluorescence microscopy. The DC2100 is a combination of linear and switching drivers, this method combines the advantage of both principles. A detailed description can be found in the manual of the LEDD1B at section 5.1 LED Driver. The parameter current accuracy does not indicate how stable the drivers are. I will contact you directly with more detailed information.
Posted Date:2014-03-26 10:33:52.203
For our application, stability of the light source is of the highest importance. Please can you tell me if intensity stability of the LEDs is primarily dictated by the LED itself (we're looking to use the 530 nm LED) or the LED driver. How do the four available LED drivers compare in terms of stability? We were assuming the parameter "current accuracy" will determine stability, is this assumption correct? Thanks, Stephen.
Posted Date:2010-04-01 11:17:49.0
a response from Julien at thorlabs: We checked and could indeed measure that pulses down to at least 5µs could be obtained with the DC2100 at a rep. rate of 10kHz and for a LED current of 1400mA.
Posted Date:2010-03-19 13:13:46.0
A response from Julien at Thorlabs to Adamt: when operated in pulsed mode, the LEDD1 has a minimum pulse width of 50µs. We are currently checking if the DC2100 can be brought to achieve 5µs pulses. We will get the test results within one or two weeks. I will contact you directly to discuss the specific details and requirements of your application.
Posted Date:2010-03-18 21:36:29.0
The ON/OFF time is listed as <25 microseconds. Do you have an idea of the shortest pulse widths possible? I am looking for an about 5 microsecond LED "flash"
Posted Date:2009-07-20 10:14:38.0
Pinout description is now in Overview and selection guide was added to other LED drivers.
Posted Date:2009-07-17 17:47:06.0
I had to search for the pin out diagram for the driver, this is pretty basic information that would best be given on the Overview tab. Also it is hard to understand all the different LED drivers offered by Thorlabs, can you add a selection guide and some links to thread them all together.
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T-Cube LED Driver 1200 mA with Trigger Mode (Power Supply Not Included)

The compact LEDD1B T-Cube is capable of driving high-power LEDs with currents up to 1200 mA. The output power can be varied using the manual control knob and modulated using an external trigger signal; the maximum output current is set using an adjuster on the front of the T-Cube. A CAB-LEDD1 LED connection cable is included with each LEDD1B.

Power supplies are sold separately; please see the options below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
LEDD1B Support Documentation
LEDD1BT-Cube LED Driver, 1200 mA Max Drive Current (Power Supply Not Included)

Compatible Power Supplies

photo of power supply adapters
Click to Enlarge

A location specific power adapter is shipped with the TPS001 based on your location.

The preferred power supply (i.e., single channel, multi-channel, or hub-based) for your LEDD1B high-power LED driver depends on your application and whether you already own compatible power supplies. Thus, Thorlabs does not prebundle a power supply with your purchase of the LEDD1B.

T-Cube Stepper Motor Operation Power Supply
Standalone / Single Channel OperationTPS001 Power Supply for a Single T-Cube
TPS008 Power Supply for up to 8 T-Cube
System / Multi-channel OperationTCH002 USB Controller Hub

The LEDD1B can be powered using either a TPS001 or a TPS008 power supply or the TCH002 T-Cube Hub and Power Supply. The TPS001, which powers a single T-Cube, and TPS008, which can power up to 8 T-Cubes, plug into a standard wall outlet and provide +15 VDC. The TCH002 Hub and Power Supply consists of two parts: the hub, which can support up to six standard-footprint T-cubes, and a power supply that plugs into a standard wall outlet and powers the hub, which in turn powers all the T-cubes connected to the hub. Although the T-Cube hub can be used to power the LEDD1B, the LED controllers do not support remote operations via the USB 2.0 hub interface.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
TCH002 Support Documentation
TCH002 T-Cube Controller Hub and Power Supply Unit
TPS001 Support Documentation
TPS00115 V Power Supply Unit for a Single T-Cube
TPS008 Support Documentation
TPS00815 V Power Supply Unit for up to 8 T-Cubes

LED Connection Cable

 Pin Code
Male M8x1 Connector
PinDescriptionWire Color
1LED AnodeBrown
2LED CathodeWhite
  • 4-Pin M8 Connector on One Side
  • 4 Bare Wires on Other Side
  • 2 m Long, 24 AWG Wires

The 4-Pin M8 connection cable can be used to connect the high-power LEDs on metal core PCB or other custom LEDs to the following Thorlabs LED drivers: LEDD1B, DC2100DC4100, and DC4104 (the latter two require the DC4100-HUB).

Pin Connection - Male
The diagram above shows the male connector for use with the above Thorlabs LED drivers. The connector is a standard M8x1 sensor circular connector. Pins 1 and 2 are the connection to the LED. Please note that the pin connection diagram shown here may not be valid for third-party LED drivers.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
CAB-LEDD1 Support Documentation
CAB-LEDD1LED Connection Cable, 2 m, M8 Connector, 4 Wires
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