PLD datasheet(11/21 Pages) WAVELENGTH

11 / 21 page

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PLD SERIES LASER DIODE DRIVER

LD Anode

LD Cathode

LD Enable

Closed = LD Enabled

Open = LD Disabled

+5 V

GND

(Internally Shorted)

Analog Input

P Monitor

(PD Current)

LIM I Monitor

LIM I Status

5 VDC

PD Anode

0.1 µF

Common

(Low Current)

GND

Short pin 9 to pin 6 when

analog input not in use.

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.

Optional External

Setpoint (0 to 5 V)

DVM

I Monitor

(Output Current)

10 k

Pull Up Resistor

Figure 10. Type A & B Laser Diode, Negative Power Supply Operation

LD Anode

LD Cathode

LD Enable

+5 V

GND

(Internally Shorted)

Analog Input

LIM I Monitor

LIM I Status

PD Cathode

Common

(Low Current)

Closed = Output Enabled

Open = Output Disabled

10µF

+5V

0.1µF

8 to

12 VDC

Heatsinking

Required

LM 317

+5V REG.

732

243

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.

Aux V+

Anode

Aux

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.

Short pin 6 to pin 9 when

analog input is not used.

Optional External

Setpoint (0 to 5 V)

+5V

10 k

Pull Up Resistor

DMM

P Monitor

(PD Current)

I Monitor

(Output Current)

Figure 11. Type C Laser Diode

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