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PLD-200 / PLD-500 / PLD-5000

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PLD5000-00400-A  Rev. B

Call 1-406-587-4910 for technical support.

www.teamwavelength.com

PLD 5V Laser Diode Drivers

PLD-500
PLD-5000

500 mA Laser Diode Driver
5 Amp Laser Diode Driver

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Ordering Information

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Pin Descriptions

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Functional Diagram

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General Description

The 

PLD

 series of Laser Diode Drivers combines the

high performance you expect from a Wavelength component
with two distinct improvements: low voltage operation from
+5 V DC, and an 

Active Current Limit

.

Operating from a 5 V supply minimizes heat

dissipation.  Modular packaging makes it easier to integrate
the PLD into your system.  For applications that require
lasers in series, a separate laser diode power supply input
lets you provide a higher compliance voltage.  The 

Active

Current Limit

 not only protects your laser diode, but ensures

that you are operating with maximum stability.   When the
laser current reaches the level set by the Limit I Trimpot,
the output disables and the Limit LED and Limit Status
indicate the current limit has been reached.

Two photodiode ranges provide variable sensitivities

for optimum operation.  You can maintain excellent stability
when operating in constant current, constant power, or
modulated mode.  All trimpots and switches are easily
accessible and offer precision control.  A slow start circuit,
mechanical shorting relay, and Active Current Limit offer
maximum protection for your laser diode even when power
is removed.

____________________ Features

200 mA, 500 mA, and 5 Amp

 

models

Single supply operation: +5 VDC

< 20 ppm constant current stability (24 hours)

< 0.02% constant power stability (24 hours)

Separate Laser Diode Supply input allows for flexible
compliance voltages up to +28 VDC typical

Manually adjust:

Setpoint & Current Limit
Constant Current or Constant Power Operation
Photodiode Sensitivity

Remotely:

Adjust Setpoint Current with Analog Input
Enable or Disable Output
Monitor Laser Diode Current, Photodiode Current,

and Laser Diode Limit Current

Monitor Limit Status

Supports all laser diode / photodiode pin configurations

Safety is maximized:

Slow start circuitry
Mechanical relay protects even when power is

removed

Active Current Limit

Integral Heatsink (Fan Assembly included with

PLD-5000)

Summary of Contents for PLD Series

Page 1: ...it LED and Limit Status indicate the current limit has been reached Two photodiode ranges provide variable sensitivities for optimum operation You can maintain excellent stability when operating in constant current constant power or modulated mode All trimpots and switches are easily accessible and offer precision control A slow start circuit mechanical shorting relay and Active Current Limit offe...

Page 2: ...not in use Supply voltage to control electronics Min 4 5 V Max 5 5 V Power supply ground Used with pin 10 for high current return Laser Diode Anode and laser diode supply connection Recommended LD Supply for single laser is 5 V Maximum 30 V CAUTION Too high a voltage may thermally damage the PLD Laser Diode Cathode For Type A or B laser diodes Photodiode Anode See page 12 for use with Type C laser...

Page 3: ...ross the laser diode 2 An oscilloscope across the laser diode 3 A current meter in series with the laser diode All measurements made with these instruments on the output should be made with a simulated load attached and not a laser diode CAUTION IF LASER DIODE AND PHOTODIODE ARE ISOLATED TYPE B LASER DIODE Short the laser diode anode to the photodiode cathode The PLD series laser diode drivers req...

Page 4: ...urrent Operating Temperature 0 to 50 C guaranteed 40 to 75 C typical Warm up 1 hour to rated accuracy Weight 0 3 Ibs Size H x W x D 1 52 x 2 65 x 0 81 PLD 200 1 52 x 2 65 x 1 10 PLD 500 1 52 x 2 65 x 1 82 PLD 5000 Connector 15 pins see page 5 for PCB layout pattern See page 16 for connector recommendation if not mounting PLD to a circuit board ___________ General Specifications Compliance Voltage ...

Page 5: ...PLD 200 PLD 500 PLD 5000 5 _____________________________________________ Mechanical Specifications _________________________________________ PCB Layout Pattern Top View ...

Page 6: ... Test Conditions PLD200 10 Ω PLD500 1 0 Ω PLD5000 0 1 Ω PLD200 10 Ω PLD500 1 0 Ω PLD5000 0 1 Ω PLD200 10 Ω PLD500 1 0 Ω PLD5000 0 1 Ω Typ 6 8 µsec 6 8 µsec 6 8 µsec 6 8 µsec 6 8 µsec 6 8 µsec 1 5 sec 1 5 sec 1 5 sec ________________________________________________ Timing Characteristics Test Setup for Parameter Measurement ...

Page 7: ...al frequency response 10 kHz square wave response Current Limit Operation PLD 500 3 5 3 2 5 2 1 5 1 0 5 0 0 5 10 100 1000 10000 100000 Frequency Hz Gain dB PLD 200 3 5 3 2 5 2 1 5 1 0 5 0 0 5 10 100 1000 10000 100000 Frequency Hz Gain dB PLD 5000 3 5 3 2 5 2 1 5 1 0 5 0 0 5 10 100 1000 10000 100000 Frequency Hz Gain dB ...

Page 8: ...0 PLD 500 PLD 5000 8 ____________________ Typical Setup for Type A or B laser diode 5V operation __________________________________ Typical Setup for Type A or B laser diode High Compliance Voltage operation ...

Page 9: ...to be set 0 2 V above desired limit level Limit Current and I Monitor Transfer Functions PLD 200 80mA Volt PLD 500 200mA Volt PLD 5000 2 Amp Volt Once Current Limit is detected the output will turn off and the LIM I led will illuminate red The LIM I Status voltage and LIM I LED will stay on until the LD Enable is toggled off then on and the error no longer exists 3 Set the output power Determine t...

Page 10: ...PLD 200 PLD 500 PLD 5000 10 __________ Typical Setup for Type A or B laser diode Negative Supply operation ...

Page 11: ...PLD 200 PLD 500 PLD 5000 11 ______________________ Operating the PLDPCB with Type A B Laser Diodes ...

Page 12: ...nstant power mode ACTIVE LIMIT CURRENT ADJUST This 12 turn trimpot adjusts the maximum laser diode forward current OUTPUT ENABLED LED Illuminates green when laser diode current is enabled The LED is not lit when the output is disabled LIMIT I LED Illuminates red when output current has reached the limit current level as set by LIMIT I Adjust Trimpot LED will stay red until the output has been disa...

Page 13: ...ch on top of PLD 2 Set Limit Current Monitor pins 5 6 adjust Current Limit trimpot clockwise until the voltage at pin 5 corresponds to the desired voltage NOTE Current limit needs to be set 0 2 V above desired limit level Limit Current and I Monitor Transfer Functions PLD 200 80mA Volt PLD 500 200mA Volt PLD 5000 2 Amp Volt Once Current Limit is detected the output will turn off and the LIM I led ...

Page 14: ...PLD 200 PLD 500 PLD 5000 14 _________________________ Operating the PLDPCB with Type C Laser Diodes ...

Page 15: ...ut Add this circuit to remove any offset Change PD Range for TYPE A or B laser diodes Put a resistor across pins 14 PD Anode and 6 Common to modify the PD range of the PLD Laser Diode Protection when using a long cable With a cable longer than two feet add a Schottky diode across the laser diode Filter the PLD Output If you don t need to modulate you can reduce the noise by filtering the output cu...

Page 16: ...ission Transportation charges or postage must be prepaid All returned products must show invoice number and date and reason for return In the United States the Food Drug Administration is responsible for monitoring laser products These products must comply with certain requirements in order to be sold to an end user The PLD series has been registered as an OEM product It does not comply with regul...

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