Wavelength Electronics PLD10000, Техническое описание и руководство по эксплуатации

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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.