© 2020

www.teamWavelength.com

4

PLD10000/PLD12500 LASER DIODE DRIVER

PIN DESCRIPTIONS

Table 1. Pin Descriptions

PIN

NAME

PIN DESCRIPTION

1

No Connect

2

PD Cathode

Photodiode cathode connection for Type C lasers only; see

Figure 9 on page 10.

3

PD Anode

Photodiode anode connection for Type A & B lasers. Photodiode feedback is required for Constant

Power-mode operation. Tie this pin to PD Aux (pin 23) for Type C lasers (see

page 10).

4, 5, 6

LD Cathode

Laser diode cathode connection.

7, 8, 9

LD Anode /

+LD Supply

Laser diode anode connection. Also used as power supply input for high-compliance lasers.

Maximum input voltage 30 VDC.

On PLD12500, the supply voltage (+5 V) and LD Anode must be separate supplies.

10, 11, 12

GND

Power supply ground. Used with +5 V for high current return.

13, 14, 15

+5 V

Supply voltage to control electronics. Range 4.5 to 5.5 VDC. The power supply must be rated to

source at least 1.1-times the laser current plus the PLD quiescent current. On PLD12500, the

supply voltage (+5 V) and LD Anode voltage must be separate supplies.

16

Analog Input

Remote setpoint or modulation input. Transfer function varies by model and operating mode—refer

to

Table 2. Range 0 to 5 V. Impedance 1 MΩ. Not TTL-compatible. Connect Analog Input pin to

Common (pin 19) when not using the Analog Input function. The Analog Input signal sums with the

onboard setpoint value. See

Electrical Specifications for damage threshold information.

17

P Monitor

Photodiode Current Monitor (power monitor). Transfer function varies by PD feedback range

setting—refer to

Table 2. Range 0 to 2.5 V. Impedance 1 kΩ.

18

I Monitor

Laser Diode Output Current Monitor. Transfer function varies by model—refer to

Table 2.

Range 0 to 2.5 V. Impedance 1 kΩ.

19

Common

Measurement ground. Low current return used only with Monitor pins and Analog Input. Internally

shorted to GND (pins 10, 11, 12).

20

LIM I Monitor

Current Limit Monitor. Transfer function varies by model—refer to

Table 2.

Range 0 to 2.5 V. Impedance 1 kΩ. The current limit voltage should be set 0.2 V above the desired

limit level. Instructions for fine-tuning the current limit are on

page 13.

21

LIM I Status

Status output pin. Indicates if the driver has reached current limit and has switched off the output.

Signal is < 0.3 V if the driver is in limit and output is latched off; signal is at 5 V when output is not

in limit. Toggle LD Enable to reset the limit circuit and enable the output current.

22

LD Enable

Output Enable. Disable = ground or floating. Enable = 3 to 5 V.

Requires 5 mA input current. Not TTL-compatible.

23

PD Aux

For TYPE C Laser Diodes only. See

Figure 9 on page 10.

24

Aux V+

For TYPE C Laser Diodes only. See

Figure 9.

Table 2. Current Output Monitor, Limit Monitor, Photodiode Current Monitor, and

Analog Input Transfer Functions

FUNCTION

MODE

PLD10000

PLD12500

LIM I Monitor (Current Limit)

CC / CP

4.6 A / V

5.0 A / V

I Monitor (Output Current)

CC / CP

4.6 A / V

5.0 A / V

Analog Input; CC-Mode

CC

2.3 A / V

2.5 A / V

Analog Input CP-Mode; Low Range

CP

100 µA / V

Analog Input, CP-Mode; High Range See Note

CP

1 mA / V

P Monitor (Photodiode Current); Low Range

CC / CP

200 µA / V

P Monitor (Photodiode Current); High Range See Note

CC / CP

2 mA / V

Note: High Range is not available when using Type C Lasers.