© 2020
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PLDXK-CH SERIES LASER DIODE DRIVER
WIRING THE PLD12.5K-CH
Figure 9. Type A & B Laser Diode, Using Two Power Supplies; PLD12.5K-CH
J3:4
H1:4
OR
LD Anode
LD Cathode
H1:2
H1:3
LD Enable
Closed = Output Enabled
Open = Output Disabled
H1:1
+5 V
GND
(Internally Shorted)
J3:5
J3:1
or
J2:1
J2:4
J3:3
J2:3
J2:2
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
J1:1
0.1 µF
Common
(Low Current)
+5V
10 kΩ
Pull Up Resistor
Short J3:5 to J3:1 when
analog input is not used.
PD
LD
PD
LD
DMM
+
-
4.5 to 30 VDC
GND
+
-
* A twisted-pair Power and LD Cable
is available separately (WCB308)
Figure 10. Type C Laser Diode Operation; PLD12.5K-CH
LD Anode
LD Cathode
LD Enable
+5 V
GND
(Internally Shorted)
Analog Input
LIM I Monitor
LIM I Status
+
-
PD Cathode
Common
(Low Current)
PD
LD
+
-
10µF
0.1µF
8 to
12.5 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.
+5V
10 kΩ
Pull Up Resistor
DMM
P Monitor
(PD Current)
I Monitor
(Output Current)
Optional External
Setpoint (0 to 5 V)
Short J3:5 to J3:1 when
analog input is not used.
J3:5
J3:1
or
J2:1
J2:4
J3:3
J2:3
J2:2
J3:4
H1:4
H1:2
H1:3
H1:1
J1:2
OR
PD
LD
PDV
J3:6
PD
Anode
PD Aux
Out
J1:1
J3:2
+
-
4.5 to 30 VDC
GND
* A twisted-pair Power and LD Cable
is available separately (WCB308)
Enable Switch Operation:
Closed = Output Enabled
Open = Output Disabled
Enable
NOTE: For two-supply operation, it is critical to shut down the power supply to the laser first before shutting down the +5V
supply powering the electronics.
