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9

PLD10000/PLD12500 LASER DIODE DRIVER

7,8,9

4,5,6

OR

LD Anode

LD Cathode

13,14,15

22

LD Enable

Closed = Output Enabled

Open = Output Disabled

10,11,12

++

--

+5 V

GND

(Internally Shorted)

16

19

18

21

17

20

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

3

0.1 µF

Common

(Low Current)

+5V

10 k

(Pull Up Resistor)

Short pin 16 to pin 19 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 6. Type A & B Laser Diode, Single 5 VDC Power Supply

7,8,9

4,5,6

LD Anode

LD Cathode

13,14,15

22

LD Enable

10,11,12

+5 V

GND

(Internally Shorted)

16

19

18

21

17

20

Analog Input

LIM I Monitor

LIM I Status

++

--

PD Anode

3

Common

(Low Current)

PD

LD

OR

Closed = Output Enabled

Open = Output Disabled

++

--

10µF

+5V

0.1µF

12 to

30 VDC

Heatsinking

Required

LM 317

+5V REG.

732

243

1

3

2

330µF

0.1µF

This circuit shows how to use a single power supply.

The LM317 (+5 V Regulator) circuit can be replaced

with a separate 5 VDC power supply.

PD

LD

Use caution when the PTC is combined with a PLD

laser driver: if the TEC or thermistor is connected to

the laser diode, two power supplies are required and

must float independently of each other.

Short pin 16 to pin 19 when

analog input is not used.

+5V

10 k

(Pull Up Resistor)

DMM

P Monitor

(PD Current)

I Monitor

(Output Current)

Optional External

Setpoint (0 to 5 V)

Figure 7. Type A & B Laser Diode, High-Compliance Laser Diode

NOTE: For dual supply operation, it is critical to shut down the power supply to the laser first before shutting down the +5V

supply powering the electronics.