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Universal Laser Diode Driver uniLDD

Universal Laser Diode Driver uniLDD

uniLDD is a DC input power converter designed to supply CW up to 100A current or pulsed (QCW) up to 360A for the single emitter, bar, stacked laser diode or high power VCSEL in constant current mode. The driver is based on DSP technology.

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Specifications
Performance
Brochures
Description
Operation mode
TEC outputs
Diode compliance voltage
Output current
Rep. Rate
Pulse Duration
Cooling
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Please fill out questionnaire for quotation for every inquiry. Questionnaire can be found in Brochures section. Configuration examples below show the versatility of UniLDD driver. Each driver is preconfigured at the factory according to customer requirements.
Code Operation mode TEC outputs Diode compliance voltage Output current Rep. Rate Pulse Duration Cooling Price Delivery Add to cart
uniLDD-CW-30-50 CW - 27 V 50 A - - Forced air Request 4 - 5 days
uniLDD-CW-30-80 CW - 27 V 80 A - - Forced air Request 4 - 5 days
uniLDD-CW-30-100 CW - 27 V 100 A - - Forced air Request Request
uniLDD-CW-60-50 CW - 35 V 40 A - - Forced air Request Request
uniLDD-CW-TEC-30-50 CW 1 27 V 50 A - - Forced air Request Request
uniLDD-QCW-2TEC-30-160 CW 2 25 V 160 A 10 Hz <300 μs Forced air Request Request
uniLDD-QCW-2TEC-100-160 QCW 2 80 V 160 A 10 Hz <300 μs Forced air Request Request
uniLDD-QCW-100-360 QCW - 80 V 300 A 15 Hz <500 μs Forced air Request Request
uniLDD-CW-QCW-30-80 CW, QCW - 25 V 80 A 10 Hz <250 μs Forced air Request Request
uniLDD-C-CW-30-50 CW - 27 V 50 A - - Conductive Request Request
uniLDD-C-CW-30-80 CW - 27 V 80 A - - Conductive Request Request

General specifications

PARAMETER VALUE NOTES
Input
Voltage, power stage 12 ... 90 V DC Control and power stage may share single supply 12 ... 30 V
Voltage, control stage 12 ... 30 V DC Control and power stage may share single supply 12 ... 30 V
Output, CW mode
Diode compliance voltage 1 ... 27 V Up to 95% of power stage supply voltage
Max current 50 A - 100 A See "Suggested configurations" tab for max current values
Current ripple 0.1 % pk-pk DC ... 100 kHz bandwidth, in x0.5 ... x1 of max current range
Current drift < 0.2 % Cold start, 8 h period, after 5 min warm up
Bandwidth of Iprogramm control input frequency > 10 kHz At minimal connection cable inductance
Output, QCW (pulse mode)
Diode compliance voltage 1 ... 80 V  
Max pulse current 160 A - 360 A See "Suggested configurations" tab for max current values
Current pulse raise > 5 µs At minimal connection cable inductance and sufficient power stage voltage
Max RMS current 80 A 80 A for diode compliance voltage >28 V
Current pulse amplitude stability 0.1 % pk-pk In x0.5 ... x1 of max current range
Current drift < 0.2% Cold start, 8 h period, after 5 min warm up
Environment
Operating temperature 0 to 40 °C De-rate current at higher temperature
Cooling Forced air, installed or external shared fan Inquire for conduction cooled version
Protections
Current transient protection and shut down
Open circuit shut-down
Power voltage brownout shut-down
Over temperature shut-down
Interlock shut-down
 
Auxiliary outputs
+5 V @ 200 mA
+15 V @ 100 mA
-15 V @ 100 mA
 
Configurations
Operation mode CW, QCW (pulse)  
Max current, CW mode 50 A, 80 A, 100 A  
Max current, pulse mode 160 A, 360 A IRMS≤100 A, duty factor ≤20%
Max power stage voltage 28 V (CW, QCW) and 90 V (QCW)  
TEC Control (if equipped)
Quantity of outputs to control 0, 1 or 2  
Max output current to TEC 25 A  
Max output voltage to TEC 28 V  
Physical characteristics
Assembly size (LxWxH) 190 x 68 x 55 mm 15 mm fan included
Conductive cooled assembly size (LxWxH) 117 x 90 x 27 mm  
Connectors Analog control - DSUB-15
Digital control - Molex Picoflex (6 pin and 10 pin)
DC power input - Multiple
 
CAN bus
  Proprietary EKSMA Optics protocol Protocol description, control application, libraries and programming samples are provided on request
  "CAN Open" stack may be added on request
RS232 port
  ASCII text command protocol  
  Proprietary EKSMA Optics CAN messages tunnel over RS232 protocol Control application, libraries and programming samples are provided

Notes:
- Max current is transient protection upper setting. Laser diode EOL nominal current should be 95% or less of this value.
- Parallel connection of several drivers can be used above 100 A in CW and 400 A in QCW.
- Specifications are subject to change without prior notice. Not all combinations of parameters are possible at the same time. See configuration samples for suggested configurations or send a request with your requirements.

 

 

Samples of SUGGESTED uniLDD DRIVER CONFIGURATIONS

CW mode preconfigured drivers

Order Code No of TEC channels Diode compliance Voltage up to Output current up to Power supply voltage
uniLDD-CW-30-50 n/a 27 V 50 A ≤ 29 VDC*
uniLDD-CW-30-80 n/a 27 V 80 A
uniLDD-CW-30-100 n/a 26 V 100 A
uniLDD-CW-TEC-30-50 1 27 V 50 A

*Power stage supply voltage need to be at least 2 V above diode compliance voltage

CW mode conductive cooling preconfigured drivers

Order Code No of TEC channels Diode compliance Voltage up to Output current up to Power supply voltage
uniLDD-C-CW-30-50 n/a 27 V 50 A ≤ 29 VDC*
uniLDD-C-CW-30-80 n/a 27 V 80 A

*Power stage supply voltage need to be at least 2 V above diode compliance voltage

QCW mode preconfigured drivers

Order Code No of TEC channels Diode compliance Voltage up to Output current up to Power supply voltage Repetition rate Pulse duration Rise time
uniLDD-QCW-30-120 n/a 6 V 120 A 24 V 2000 Hz 300 µs 30 µs
uniLDD-QCW-30-100 n/a 22 V 100 A 28 V 10 Hz 450 ms 1 ms
uniLDD-QCW-100-360 n/a 70 V 360 A 90 V 20 Hz 500 µs 50 µs
uniLDD-QCW-2TEC-30-220 2 5 V 200 A 12 V 100 Hz 300 µs 30 µs
uniLDD-QCW-1TEC-100-150 1 70 V 150 A 90 V 20 Hz 250 µs 40 µs

Above table are just for illustration of versatility of uniLDD driver. Drivers are ready to be preconfigured at the factory for specific requirements.

uniLDD Laser Diode Driver current drift 

uniLDD current drift
from cold start for different currents

uniLDD Laser Diode Driver current error

uniLDD current error
12 V and 24 V DC power, 2 V junction + 10 MΩ series R load

uniLDD Laser Diode Driver current efficiency

uniLDD efficiency
12 V and 24 V DC power, 2 V junction + 10 MΩ series R load

uniLDD Laser Diode Driver current ripple

uniLDD efficiency
12 V and 24 V DC power, 2 V junction + 10 MΩ series R load

Frequently Asked Questions
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EKSMA Optics uniLDD Laser Diode Drivers
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Questionnaire for Quotation
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uniLDD is a DC input power converter designed to supply CW up to 100A current or pulsed (QCW) up to 360A for the single emitter, bar, stacked laser diode or high power VCSEL in constant current mode. Using different software versions and minor hardware modifications, the uniLDD driver is adapted for different types of laser diodes and modes of operation. The driver is based on DSP technology.

At the factory done frequency response analysis based on custom customer’s requirements allows to achieve stable operation with any load and connection cables combination in both CW and QCW operation modes. Besides, this lets to shorten rise time in QCW mode if necessary. To fulfill all those features and deliver the driver with the best performance, we ask to fill in the questionnaire.

High-efficiency PWM-based converter with up to 4-phases output provides around 90% efficiency and gives very smooth, low noise and high precision output to the laser diode. The performance results of the driver on the test bench are given in the charts here. The uniLDD driver is most effective if used for diode currents above 10A. Depending on the configuration, uniLDD driver control is done by analog, CAN and RS232 interfaces.

The driver can be delivered in two possible design shapes. The first one is an internal fan-cooled set of screwed together set of boards. This is a general, most flexible design allowing easy customization and implementing most of the possible features. The second one, the conductive cooling driver is specifically adapted for CW operation and lets to save design space. No fan is required. Cooling is done by attaching the board to a massive enough heatsink or cold plate.

Optionally, uniLDD allows bidirectional control (active heating and cooling) of one or two TEC's with the same driver providing current up to 25 A and voltage up to 28 V.

Features:

  • Latest DSP based control technology
  • Design for high power applications
  • Max 100 A & 27 V in CW mode
  • Max 360 A & 80 V in QCW mode
  • Low current ripple
  • Low current drift
  • High precision and stability
  • Optional integrated TEC controller
  • Analog and digital control interfaces