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Wavelength Electronics PLD10000, Техническое описание и руководство по эксплуатации

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16

PLD10000/PLD12500 LASER DIODE DRIVER

OUTPUT ON/OFF AND CURRENT LIMIT TIMING

Figure 18

 through 

Figure 20

 illustrate the the output turn-on 

delay, slowstart turn-on/off time, and current limit response.

Figure 18.   Output Turn-On Delay

 

Figure 19.   Output On/Off-Time

Figure 20.   Current Limit Response

Содержание PLD10000

Страница 1: ...witches off the output if the current limit is reached a slow start circuit ramps the output current and a mechanical shorting relay protects the laser from ESD events while the output is switched off...

Страница 2: ...e Cathode Photodiode Anode Common MODE P L I H OUT LIM I PLD10000 Laser Diode Driver PD RNG 5V Analog In P Monitor I Monitor Common Lim I Mon Lim I Stat LD Enable PD Aux Aux V GND LD Anode LD Supply L...

Страница 3: ...refer to Figure 4 When using the test load the actual drive current can be determined by measuring the voltage drop across the resistor Do not place an ammeter in series with the load circuit 1 5 2 5...

Страница 4: ...by PD feedback range setting refer to Table 2 Range 0 to 2 5 V Impedance 1 k 18 I Monitor Laser Diode Output Current Monitor Transfer function varies by model refer to Table 2 Range 0 to 2 5 V Impeda...

Страница 5: ...ge Threshold VIN 0 5 or VIN 0 5 V above Supply Voltage on Pin 15 V Input Pin Impedance 1 M Bandwidth 3 dB5 90 70 kHz Depth of Modulation at 60 kHz6 90 Rise Time 7 7 sec Fall Time 8 8 sec TIMING CHARAC...

Страница 6: ...by the setpoint The current source continually 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...

Страница 7: ...LD10000 5 VDC power supply rated for 250 mA Power supply rated for 1 1 times the maximum laser diode drive current and 2 5 V greater than the compliance voltage of the laser NOTE For dual supply opera...

Страница 8: ...must be removed when using the PLD12500 The factory default configuration is with the jumper installed GND VCC GND Connector AUX VCC VCC NC PD ANODE PD CATHODE ANALOG INPUT I MONITOR COMMON MON LIM I...

Страница 9: ...D 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 10 F 5V 0 1 F 1...

Страница 10: ...le 10 11 12 5 V GND Internally Shorted 16 19 18 21 17 20 Analog Input LIM I Monitor LIM I Status PD Cathode 2 Common Low Current PD LD OR Closed Output Enabled Open Output Disabled 10 F 5V 0 1 F 8 to...

Страница 11: ...be damaged or destroyed CALCULATE THE MONITOR VOLTAGES Refer to the datasheet for your laser to determine the maximum forward current and calculate the LIM I Monitor voltage using this equation and t...

Страница 12: ...The Analog Input voltage signal on pin 16 sums with the onboard trimpot setpoint This configuration allows the driver to be configured so that the laser current or power modulates around a DC setpoin...

Страница 13: ...he external resistor 3 19 PD Range Switch 554 5 k PD Range 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...

Страница 14: ...y grounded If the PLD driver is used with a Wavelength Electronics temperature controller you may need to use two separate power supplies that float independently of each other If the laser anode is c...

Страница 15: ...5 Output Timing Revision B MODEL TURN ON TIME TURN OFF TIME SLOWSTART DELAY PLD10000 5 3 sec 9 5 sec 1 5 sec PLD12500 5 sec 8 sec 1 5 sec MONITOR CALIBRATION CIRCUIT A small offset may be present whe...

Страница 16: ...DRIVER OUTPUT ON OFF AND CURRENT LIMIT TIMING Figure 18 through Figure 20 illustrate the the output turn on delay slowstart turn on off time and current limit response Figure 18 Output Turn On Delay...

Страница 17: ...late the voltage drop across the controller VDROP VS VMAX VS is the power supply voltage Mark VDROP on the X axis and extend a line upward Mark IMAX on the Y axis and extend a line to the right until...

Страница 18: ...ations table on page 5 If the driver is compliance limited VLD Anode pins 7 8 9 may need to be increased Verify that the PLD will be operating within the Safe Operating Area if the supply voltage is i...

Страница 19: ...2 450 62 23 3 050 77 47 2 75 69 85 0 30 7 62 3 35 85 09 3 20 81 28 0 40 10 16 0 15 3 81 1 03 26 15 1 100 27 94 Figure 23 PL10000 PLD12500 Mechanical Dimensions 4 000 0 250 4 500 5 000 0 250 5 500 0 1...

Страница 20: ...s document is subject to change without notice Wavelength will not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use...

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