© 2020
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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 kΩ
(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.
732Ω
243Ω
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 kΩ
(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.
