uniLDD series

Laser Diode Drivers‘ Family
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  • Best suitable for high-current and high-power applications
  • High efficiency switching mode converter
  • Low current drift
  • Analog and digital (CAN, RS232) control interfaces
  • Best suitable for high-current and high-power applications
  • High efficiency switching mode converter
  • Low current drift
  • Analog and digital (CAN, RS232) control interfaces

Features

Features

  • Best suitable for high-current and high-power applications
  • Different firmware versions featuring CW, QCW, TEC control operation
  • Hardware versions for CW, QCW, TEC control, Conductive cooling options
  • At factory frequency response analysis is used to optimize performance to achieve stable operation with particular laser diode and connection cables combination
  • High efficiency switching mode converter
  • Multi-phase power stage for low current ripple
  • Low current drift
  • Parallel operation of two or more drivers to multiply output voltage
  • “Voltage booster” layout option to extend output voltage to 200 V and more
  • External storage capacitor option for long-pulse QCW operation
  • Analog and digital (CAN*, RS232) control interfaces

* For CAN communication at evaluation stage Ekspla’s CAN-USB adapter is required.

CUstom optimizations

  • Firmware version (chosen from different 5 ready versions)
  • Hardware components set
  • Regulation loop frequency response analysis and PID constants defining
  • Hardware and software settings

Description

Driver that can supply almost any middle- and high-power laser diode in continuous or pulsed operation mode.

uniLDD is a DC input power converter designed to supply CW or pulsed (QCW) current for the single emitter, bar, stacked laser diode or high power VCSEL in constant current mode.

Using different software versions together with specific hardware sets, the uniLDD driver is adapted for different types of laser diodes and modes of operation. The driver is based on DSP technology assuring high specifications. Typical performance is presented in below illustrations.

Next optimizations are done while adapting according to customer requirements (current, voltage, cables…):

  • Firmware version (chosen from different 5 ready versions)
  • Hardware components set
  • Regulation loop frequency response analysis and PID constants defining
  • Hardware and software settings

One or two TEC control channels can be added as option. However, the price for the feature is reduction of maximal possible output current to laser diode since 2 or 3 output stages of total 5 are utilized for TEC supply.

Specifications

ParameterValue 1) 2)Notes
OUTPUT, CW mode
Diode compliance voltage1 … 55 VUp to 95% of power stage supply voltage. Can be extended using voltage booster layout
Max current50 – 120 ACan be extended above 120 A using parallel connection of several drivers
Current ripple0.1% pk-pkDC … 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 kHzAt minimal connection cable inductance
OUTPUT, QCW (Pulse mode)
Diode compliance voltage1 … 80 VCan be extended using voltage booster layout
Max pulse current160 – 360 ACan be extended above 360 A using parallel connection of the drivers
Duty cycle≤ 20%
Current pulse raise, typical range10 … 50 μs@ minimal connection cable inductance and sufficient power stage voltage
Max RMS current100 A80 A for diode compliance voltage gt; 28 V
Current pulse amplitude stability0.1% pk-pkIn x0.5…x1 of max current range
Current drift< 0.2%Cold start, 8 h period, after 5 min. warm up
OUTPUT, TEC control (if equipped)
Quantity of output channels1 or 2
Maximal output current25 A
Maximal output voltage25 V
INPUT
Supply voltage, power stage12… 90 VDC
Supply voltage, control stage12 … 30 VDC
PROTECTIONS
Current transient protectionShut-down
Open circuitShut-down
Over temperatureShut-down
Power voltage brownoutShut-down
InterlockShut-down
AUXILIARY OUTPUTS
Aux1+5 V @ 200 mA
Aux2+15 V @ 100 mA
Aux3-15 V @ 100 mA
PHYSICAL CHARACTERISTICS
Assembly dimensions (L x W x H)190 x 68 x 55 mm
ENVIRONMENT
Operating temperature0 to 40°CDe-rate current at higher temperature
CoolingForced air or conductiveInstalled or external shared fan. Conductive cooling version available as option
  1. Specifications are subject to change without prior notice.
  2. Not all combinations of parameters are possible at the same time.

Configurations

ConfigurationParameterValue
uniLDD-C-CW-30-100 1)

Driver for CW mode operation (conductively cooled)
Operation modeCW
Maximum current to laser diode100 A
Maximum compliance voltage30 V
uniLDD-A-CW-25-75-1TEC

Driver for CW mode operation and one stage bidirectional TEC control (air-cooled)
Operation modeCW-TEC
Maximum current to laser diode75 A
Maximum compliance voltage25 V
Maximum current to TEC25 A
Maximum TEC voltage25 V
uniLDD-A-CW-25-100 1)

Driver for CW mode operation (air-cooled)
Operation modeCW
Maximum current to laser diode100 A
Maximum compliance voltage25 V
uniLDD-A-QCW-80-360

Driver for QCW mode operation (air-cooled)
Operation modeQCW
Maximum current to laser diode360 A
Maximum compliance voltage80 V
Hardware options rated30, 60, 100 V
uniLDD-A-QCW-80-270-1TEC

Driver for QCW mode operation and one channel bidirectional TEC control (air-cooled)
Operation modeQCW-TEC
Maximum current to laser diode270 A
Maximum compliance voltage80 V
Hardware options rated30, 60, 100 V
uniLDD-A-QCW-80-180-2TEC

Driver for QCW mode operation and two channels bidirectional TEC control (air-cooled)
Operation modeQCW-TEC
Maximum current to laser diode180 A
Maximum compliance voltage80 V
Hardware options rated30, 60, 100 V
  1. Voltage extension possible by customization and current reduction.

Performance

Images

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