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2

PLD SERIES LASER DIODE DRIVER

QUICK CONNECT GUIDE

!

ToensuresafeoperationofthePLDdriver,itis

imperativethatyoudeterminethattheunitwillbe

operatingwithintheinternalheatdissipationSafe

Operating Area (SOA).

Visit the Wavelength Electronics website for the most

accurate, up-to-date, and easy to use SOA calculator:

www.teamwavelength.com/support/design-tools/soa-ld-calculator

Figure 1 shows the front panel of the PLD driver and the

locations of the configuration switches, Output and Current

Limit adjust trimpots, status LEDs, and pins.

Figure 2 shows a typical wiring diagram for the PLD driver

and external electronics to operate a Type A or B laser.

Figure 3 illustrates the three laser types that the PLD can

drive. For detailed instructions on using the different laser

types refer to the

Operating Instructions.

Figure 1. PLD Driver Controls

Electronics

avelength

PLD SERIES

P

L

PD RANGE

H

I

MODE

Operating Mode *

Output Adjust (12-turn)

Current Limit Adjust (12-turn)

Output Enabled LED (Green = On)

Current Limit Status

(Red = Current Latched Off)

PD Range *

L = 15 – 500 µA

H = 50 – 5000 µA

P = Constant Power

I = Constant Current

LASER DIODE

DRIVER

OUTPUT

ADJUST

LIMIT I

ADJUST

OUTPUT

ENABLED

LIMIT I

15

1

* DO NOT change switch positions while the output

is enabled; Doing so may damage the laser diode.

PD Cathode

PD Anode

LD Cathode

LD Anode/+LD Supply

GND

+5V

Analog Input

P Monitor

I Monitor

Common

LIM I Monitor

LIM I Status

LD Enable

PD Aux

Aux V+

!

14

13

12

11

10

9

8

7

6

5

4

3

2

12

13

OR

LD Anode

LD Cathode

10

3

LD Enable

Closed = Output Enabled

Open = Output Disabled

11

+

-

+5 V

GND

(Internally Shorted)

9

6

7

4

8

5

Analog Input

P Monitor

(PD Current)

I Monitor

(Output Current)

LIM I Monitor

LIM I Status

Optional External

Setpoint (0 to 5 V)

+

-

5 VDC

PD Anode

14

0.1 µF

Common

(Low Current)

+5V

10 k

Pull Up Resistor

Short pin 6 to pin 9 when

analog input is not used.

PD

LD

PD

LD

Use caution when the PLD is combined with a

PTC temperature controller: if the TEC or

thermistor is connected to the laser diode, two

power supplies are required and must float

independently of each other.

DMM

Figure 2. Quick Connect Wiring Diagram, Type A & B Laser Diodes

Type A Laser Diode

Type B Laser Diode

Type C Laser Diode

Common

Cathode

Laser Diode Anode &

Photodiode Cathode Common

Isolated Photodiode

Short the

Laser Diode Anode

to Photodiode Cathode

Common

Anode

Laser Diode Cathode &

Photodiode Anode Common

Figure 3. Laser Type Diagrams