Introducing the PCM-7140
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The pcm-7140 laser diode driver module by IXYS Colorado includes a control cable, manual, and various output boards for different current ranges (0.1a to 200a) with fast rise and fall times. It features a liquid cooling system, error detection for open load and over-temperature conditions, and is designed for high frequency and duty cycle operations. The document outlines setup instructions, troubleshooting steps, and example scenarios for effective operation.
Introducing the PCM-7140
- 1. PCM-7140 LASER DIODE DRIVER MODULE IXYS COLORADO IS YOUR PARTNER FROM THE LAB TO PRODUCT LAUNCH
- 2. What’s in the Box? PCM-7140 Control cable DEI# 6100-0091 Manual Control Board and cable DEI#6100-0092 Output/Input cable DEI# 6100-0144 Output Board Operating Manual 2
- 3. Front & Rear View 3
- 4. Available Models PCM-7140-200 Output Current 5A to 200A Rise/Fall Time less than 20 µs PCM-7140-10 Output Current 1A to 10A Rise/Fall Time less than 12 µs PCM-7140-1 Output Current 0.1A to 1A Rise/Fall Time less than 5 µs 4
- 5. Technical Overview 5 Current Monitor Potentiometer / Analog control of output current Error detection Open load Over temperature Liquid Cooled Flow rate 1L/min to 6 L/min Input Temperature 11 °C to 22 °C Connection 3/8” tubing
- 9. Technical Overview (200A unit) 9 Current rise/fall time ≤ 20 µs : 5 A to 49 A ≤ 16 µs : 50 A to 99 A ≤ 10 µs : ≥ 100 A Forward Voltage 0V to 55V Frequency Range Single shot to 5,500 Hz 100% Duty Cycle Operation 5A to 20A 200 A, 12.5 V, 200 µs pulse width
- 10. Technical Overview (200A unit) 10
- 11. Technical Overview (200A unit) 11 Example: 175A Output Pulse width 300µs Maximum Frequency =90Hz
- 12. Technical Overview (200A unit) 12 Example: 100A Output 50Hz Max Pulse width = 1100µs
- 13. Technical Overview (10A unit) 13 Current rise/fall time ≤ 12 µs : 1 A to 3 A ≤ 3 µs : 3.01 A to 5 A ≤ 2 µs : ≥ 5.01 A Forward Voltage 0V to 65V Frequency Range Single shot to 120,000 Hz 100% Duty Cycle Operation 1A to 10A* 10 A, 300 µs pulse width
- 14. Technical Overview (10A unit) 14
- 15. Technical Overview (10A unit) 15
- 16. Technical Overview (1A unit) 16 Current rise/fall time ≤ 5 µs : 0.1 A to 0.499 A ≤ 2 µs : 0.500 A to 1.0 A Forward Voltage 0V to 65V Frequency Range Single Shot to 100,000 Hz 100% Duty Cycle Operation 0.1 A to 1 A 1000 mA, 300 µs pulse width
- 17. Technical Overview (1A unit) 17
- 18. Technical Overview (1A unit) 18
- 19. Setting Up 19
- 20. Setting Up 20
- 21. Setting Up 21 These parts will not be used, set them aside. We will be using a different cable for this presentation. We also will not install the four rubber feet.
- 22. Setting Up 22 Install the input/output cable. Install the control cable to the PCM-7140 and manual control board.
- 23. Setting Up 23 Install the load to the input / output cable. This is a 0.1964 ohm low inductance high power load
- 24. Setting Up 24 Install the input/output cable to the DC input voltage source.
- 25. Setting Up 25 Install SMB/BNC cable (not included) from the trigger source to J12 on manual control board.
- 26. Setting Up 26 Connect hoses to the copper pipes. And connect them to your chiller or house water. Turn on chiller or water source and assure there are no leaks.
- 27. Setting Up 27 Install SMB/BNC cable (not included) from the current monitor to oscilloscope.
- 28. Setting Up 28 Change dipswitch settings on manual control board as shown. This will enable current control using R40 on the manual control board. Adjust R40 to midscale, this will set the output current to about 100A.
- 29. Setting Up 29 Install +12VDC power source to the manual control board.
- 30. Setting Up 30 Enable the 12VDC power source. Note that the Status LED turns on red. Within 10 seconds enable the DC input supply.
- 31. Setting Up 31 Enable the DC input supply. We are going create a 110A pulse so we set the voltage to (110A)*(0.1964 ohm) + 12V = 34V
- 32. Setting Up 32 As soon as the system has +12V DC and DC Input Voltage the status LED goes out. Now the system can be enabled.
- 33. Setting Up 33 Enable the trigger source. Make sure that the frequency and pulse width is safe by reviewing the SOA graphs.
- 34. Setting Up 34 Here is the output pulse waveform. This is looking at current monitor. Note the scope is set to 50ohm impedance 1:1.
- 35. Setting Up 35 Here is a view of the entire system, except the DC input source which is out of the frame.
- 36. Solutions to Common Problems 36 Problem: Red status LED is ON Solutions: 1) Upon power up the status LED is on for about 10 seconds. This is normal. 2) Open Load Fault detected? The DC Input Voltage must be over Vforward by the amount shown in the datasheet. Review the datasheet, power down 12V and DC input voltage for at least 30 seconds. Power up the module using the procedure in the manual. 3) Thermal Fault detected? Check liquid flow. Check SOA curves in the datasheet to determine if the module is running within the Safe Operating Area. Review the DC Input Voltage setting to assure it is set properly. Power down 12V and DC input voltage for at least 30 seconds. Power up the module using the procedure in the manual.
- 37. Solutions to Common Problems Problem: Ringing or distortion on the output Solutions: 1) Review datasheet to assure DC input voltage is set properly. 2) Make sure the laser is connected to the load board properly. It is very important to reduce the inductance as much as possible. 37