uniLDD driver

Universal Laser Diode Driver
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  • Economical OEM module
  • Wide current range
  • Wide diode compliance voltage range
  • Latest DSP based control technology
  • Economical OEM module
  • Wide current range
  • Wide diode compliance voltage range
  • Latest DSP based control technology

Description

Features

  • Economical OEM module

  • Wide current range


  • Wide diode compliance voltage range

  • Storage capacitor option for pulse mode

  • Storage capacitor charger (current limit) option pulse mode

  • Latest DSP based control technology

  • Frequency response analysis feature allows easy compensation to achieve stable operation with any load and connection cables combination in both CW and QCW modes

  • High efficiency switching mode converter

  • Multi-phase low ripple power stage

  • Board fan and unit fan PWM controllers

  • Low current ripple

  • Low current drift

  • TEC controller option


  • Analog and digital control interfaces

  • Easy configuration

Description

uniLDD is DC input power converter designed to supply CW or pulsed current for single emitter, bar or stacked laser diode in Constant Current Mode (or CC mode).

It can be installed either as unit assembled either as set of open PCB boards or as standalone unit. The standalone unit is uniLDD enclosed together with the power supply.


Specifications

ParameterValueNotes
INPUT
Voltage, power stage12 … 90 V DCControl and power stage may share single supply 12…30 V
Voltage, control stage12 … 30 V DCControl and power stage may share single supply 12…30 V
OUTPUT, CW mode
Diode compliance voltage1 … 28 VUp to 95% of power stage supply voltage
Max current15 A – 100 ASee CONFIGURATION for max current values
Current ripple0.1 % pk-pkDC … 100 kHz bandwidth, in ×0.5 … ×1 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, OCW (Pulse mode)
Diode compliance voltage1 … 80 V
Max pulse current60 A – 400 ASee CONFIGURATION for max current values
Current pulse raise< 5 µsAt minimal connection cable inductance and sufficient power stage voltage
Max RMS current100 A80 A for diode compliance voltage > 28 V
Current pulse amplitude stability0.1% pk-pkIn ×0.5 … ×1 of max current range
Current drift< 0.2 %Cold start, 8 h period, after 5 min warm up
ENVIRONMENT
Operating temperature0 to 40 °CDe-rate current at higher temperature
CoolingForced air, installed or external shared fanInquire 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 modeCW, QCW (pulse)
Max current, CW mode15 A, 25 A, 50 A, 100 A
Max current, pulse mode60 A, 100 A, 200 A, 400 AIRMS ≤ 100 A, duty factor ≤ 20 %
Max power stage voltage28 V (CW, QCW) and 90 V (QCW)
PHYSICAL CHARACTERISTICS
Assembly size long version (L×W×H)190 × 68 × 55 mm15 mm fan included
Assembly size short version (L×W×H)120 × 63 × 50 mmfor currents < 50 A, fan excluded
ConnectorsAnalog control – DSUB-15Pin-out resembles standard interface of LDN series diode drivers from Lumina Power
Digital control – Molex Picoflex6 pin and 10 pin connectors
DC power input – Multiple
DIGITAL CONTROL INTERFACE
CAN busProprietary Ekspla protocolProtocol description, control application, libraries and programming samples are provided on request
"CAN Open" stackmay be added on request
RS232 portASCII text command protocol
Proprietary Ekspla CAN messages tunnel over RS232 protocolControl application, libraries and programming samples are provided
  1. Max current is transient protection upper setting. Laser diode EOL nominal current should be 95% or less of this value.

  2. Parallel connection of several drivers can be used above 100 A in CW and 400 A in QCW.

Analog Control Signals

Description of Analog interface pinout

Connector type: 15 pin D-SUB female

PinSignal nameDirectionVoltage levelDescription
1EnableInputTTL, LVTTLThe enable function pulls the RTO signal high
2Ready to Operate (RTO)Input/Output through
330 Ω resistor
>2.4 V driver output is active, <0.5 V output is clampedRTO is tied to "High" by the driver when "Enable" input is High. Alarms clamp RTO low and disable driver output. External device may clamp RTO to GND and disable driver output. RTO allows to join fault circuits of several drivers connected in parallel
3InterlockInput10 kΩ pull up to 3.3 V,
LOW ≤ 0.4 V
The Interlock function can be connected to external safety or machine protection switches such as door or temperature switches. Open = OFF Connect to GND = RUN
4GND
5Vout monitorOutputVout, driver output voltageThe output voltage monitor. Vout = Diode compliance voltage + voltage drop on connection wires
6Iout monitorOutput0 – 12 V 1) = 0 – Iout maxThe output current monitor
7IprogramInput0 – 9 V 1) = 0 – Iout maxOutput current setting or modulating by applying a voltage,
CW and Pulse mode
8Pulse controlInputTTL, LVTTL positive pulseTrigger input for pulse mode. Pulse rise will trigger current pulse of preset width
9GND
15GND
10, 11+5VOutput+5VAuxiliary, 200 mA
12-15VOutput-15VAuxiliary, 100 mA
13, 14+15VOutput+15VAuxiliary, 200 mA
  1. Subject to change.

Performance & Drawings

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