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Wavelength Electronics PLD K-CH Series, Datasheet And Operating Manual

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Wavelength Electronics PLD K-CH Series Datasheet And Operating Manual Download Page 12

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12

PLDXK-CH SERIES LASER DIODE DRIVER

WIRING THE PLD12.5K-CH (CONTINUED)

Figure 11.  Type A & B Laser Diode, Negative Power Supply Operation; 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)

Short J3:5 to J3:1 when

analog input is not used.

PD

LD

PD

LD

DMM

10 kΩ

Pull Up Resistor

GND

+

-

+

-

Laser Power

Supply (Note 1)

1.  Refer  to  the  section  on  Negative  Laser 

Power Supply Wiring in this datasheet.

* A twisted-pair Power and LD Cable 

is available separately (WCB308)

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.

Summary of Contents for PLD K-CH Series

Page 1: ...nt limit switches off the output if the current limit is reached slow start circuit ramps the output current and a mechanical shorting relay protects the laser from ESD events Long term reliability me...

Page 2: ...djust 12 turn Operating Mode PD Range L 15 500 A H 50 5000 A CP Constant Power CC Constant Current J1 J3 J2 Limit Adjust 12 turn Current Limit LED Output Enabled LED H1 PIN 1 COMMON Photodiode Output...

Page 3: ...ing the voltage drop across the resistor Do not place an ammeter in series with the load circuit 1 5 2 5 V Compliance Current to 15 0 A Components must be heat sinked 0 05 100 W STPS20M100ST 2x J3 4 H...

Page 4: ...mit Setpoint Monitor Transfer function varies by model refer to Table 2 Range 0 to 2 5 V Impedance 1 k NOTE Current limit needs to be set 0 2 V above desired level see page 15 for instructions on fine...

Page 5: ...it Setpoint Monitor CC CP VLMON 2 A V 4 6 A V 5 A V IMON Output Current Monitor CC CP VIMON 2 A V 4 6 A V 5 A V Analog Input CC Mode CC 1 A V 2 3 A V 2 5 A V PMON Photodiode Current Monitor Low Range...

Page 6: ...m Quiescent Current 150 150 250 mA Temperature Coefficient 200 ppm C Noise Ripple3 45 A PHOTODIODE FEEDBACK High Range Type A B Lasers Only 50 5000 A Low Range 15 500 A Constant Power Mode Output Stab...

Page 7: ...inually monitors the actual output current compares it to the setpoint and adjusts the current if there is a difference between the two signals It may be useful to remember that you do not directly se...

Page 8: ...r rated for 1 1 times the maximum laser diode drive current and 2 V greater than the compliance voltage of the laser NOTE It is critical to shut down the power supply to the laser first before shuttin...

Page 9: ...thode LD Enable 5 V GND Internally Shorted Analog Input LIM I Monitor LIM I Status PD Anode Common Low Current PD LD OR 10 F 0 1 F 7 to 30 VDC LM 317 5V REG 732 243 1 3 2 330 F 0 1 F This circuit show...

Page 10: ...12 5K CH A twisted pair Power and LD Cable is available separately WCB308 Closed Output Enabled Open Output Disabled Figure 8 Type A B Lasers Negative Power Supply Operation PLD5K CH and PLD10K CH J3...

Page 11: ...athode LD Enable 5 V GND Internally Shorted Analog Input LIM I Monitor LIM I Status PD Cathode Common Low Current PD LD 10 F 0 1 F 8 to 12 5 VDC Heatsinking Required LM 317 5V REG 732 243 1 3 2 330 F...

Page 12: ...or 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 F Common Low Current Short J3 5 to J3 1 when analog input is not used PD L...

Page 13: ...r To trip the current limit at exactly the desired current level refer to Set the Current Limit More Accurately on page 15 to fine tune the current limit ONBOARD ADJUSTMENTS AND CONTROLS Onboard contr...

Page 14: ...oint This configuration allows the driver to be configured so that the laser current or power modulates around a DC setpoint If the sum of the two signals causes the PLDxK CH to attempt to drive the o...

Page 15: ...nge L A A V PD Range H 2 5 V 10 6 R 500 Range A A V 6 R 500 10 Transfer Function 2 5 V 10 6 R 5 k Range 6 R 5 k 10 Transfer Function R 5 k R 5000 R 5000 R 500 R 500 R 500 PD Anode COMMON R Internal El...

Page 16: ...nding to ensure safe operation of the PLDxK CH and laser It is critical that the PLDxK CH Driver is properly grounded If the PLDxK CH Driver is used with a Wavelength Electronics temperature controlle...

Page 17: ...ode Schottky Diode 1N5818 0 1 F 10 F H1 3 H1 4 Figure 19 PLDxK CH Output Filter MONITOR CALIBRATION CIRCUIT A small offset may be present when measuring the PMON IMON or LMON voltage with respect to t...

Page 18: ...driven by a negative voltage power supply for the best possible noise performance The electronics of the PLDxK CH driver must be biased by a 5 V power supply configuring the driver requires care when...

Page 19: ...download applicationtechnotes an ld06 pdf POWER SUPPLIES AND NOISE The PLDxK CH drivers deliver stable current with low noise but the power supply you use will directly influence the noise performanc...

Page 20: ...ard Mark IMAX on the Y axis and extend a line to the right until it intersects the VDROP line On the X axis mark value of VS Extend a diagonal line from VS to the intersection of the VDROP and IMAX li...

Page 21: ...iode specifications to determine the forward voltage VF Make sure that the PLDxK CH is not compliance limited Refer to the Electrical Specifications table on page 6 If the driver is compliance limited...

Page 22: ...CLUDED WITH PLDXK CH MOLEX PART 10 11 2063 5 0 1 2 3 4 6 5 BLACK ORANGE WHITE RED BLUE GREEN SHIELD WIRE OVERALL LENGTH 24 PHOTODIODE CABLE WCB307 INCLUDED WITH PLDXK CH 2 0 RED BLK PIN 1 PIN 2 PD CAT...

Page 23: ...PECIFICATIONS 2 90 73 66 3 19 80 93 1 12 28 45 0 19 4 83 0 94 23 88 2 10 53 34 1 85 46 99 2 35 59 69 2 60 66 04 2 90 73 66 0 70 17 78 0 15 3 81 0 13 3 18 2 Holes Direction for Recommended Airflow Figu...

Page 24: ...ing this product NOTICE The information contained in this document is subject to change without notice Wavelength will not be liable for errors contained herein or for incidental or consequential dama...

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