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Laser Lab Source SF8000 Operating Manual

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Summary of Contents for Laser Lab Source SF8000

  • Page 2: Table Of Contents

    SF8025, SF8075, SF8150, SF8300 Table of content Laser diode driver features ........................3 Applications ............................3 TEC controller features ........................3 Controls ..............................3 Description ............................3 Shipping kit ............................3 Overall dimensions and weight ......................3 Versions ............................... 4 Absolute maximum ratings ........................

  • Page 3: Laser Diode Driver Features

    The SF8000 can be controlled by analog or digital signals as well as potentiomers on the board. The SF8000 is housed in 61 × 101.6 mm package with aluminum base plate to aid thermal dissipation from the laser diode. The laser diode mount is located on the board.

  • Page 4: Versions

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 8. Versions / Models Device LDD MAX current, mA LD mount LD case SF8025-10 Soldering 10-pin Type 1 SF8025-ZIF10 Plug-in connector 10-pin Type 1 SF8025-14 Soldering 14-pin Type 1 SF8025-ZIF14 Plug-in connector 14-pin Type 1 SF8075-10 Soldering 10-pin Type 1...

  • Page 5: Power Supply Requirements

    SF8025, SF8075, SF8150, SF8300 11. Power Supply Requirements The SF8000 requires a 5V DC power supply. The DC power supply must be able to supply adequate power to the current source / driver and TEC output power. The power supply must provide 20 watts or more (depends on SF8000 model) and line regulation ±...

  • Page 6: Typical Performance Characteristics

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 LDD current set step Set by RS-232 or UART LDD current set accuracy LDD current set calibration TEC temperature set step Set by RS-232 or UART 0.01 °C TEC temperature set accuracy TEC temperature set calibration AUX SUPPLY 2.5V accuracy 2.5V output current...
  • Page 7 Maiman Electronics SF8025, SF8075, SF8150, SF8300 150mA/div 500us/div Fig. 3 – Typical start up sequence SF8075 Fig. 4 – Typical stop sequence SF8075 300mA/div 500us/div Fig. 5 – Typical start up sequence SF8150 Fig. 6 – Typical stop sequence SF8150 600mA/div 500us/div Fig.

  • Page 8: Functional Scheme

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 14. Functional Schematic Diagram Analog Interface:...

  • Page 9: Pin And Terminal Functions

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 15. Pin and terminal functions NOTE POLARITY: Never ground any leads of the outputs of the driver as this may cause permanent damage to the laser diode and the driver. Never use grounded probes (e.g. from the oscilloscope) to test the output of the driver. Please note that control pins are not isolated.
  • Page 10 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Digital control connector Wurth WR-MM 690157000872 or TE Connectivity 215083-8 Description UART RXD RS-232 RXD UART ТXD RS-232 TXD Connected to Vin+ Interlock (duplicates pin 15 of analog control connector) Crowbar status (duplicates pin 5 of analog control connector) GND (connected to Vin- terminal) Analogue control connector...
  • Page 11 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Laser diode pinout № Description № Description TEC Anode TEC Cathode Thermistor Monitor PD Anode Monitor PD Cathode LD Cathode Thermistor LD Anode...

  • Page 12: Analog Controls Description

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 16. Analog control description 16.1. Laser Diode Driver Enable and TEC Enable The "Enable" contacts are logic inputs. Apply high level to «TEC Enable» pin to start temperature stabilization. Apply low level to «TEC Enable» pin to stop temperature stabilization. Apply high level to «Laser Driver Enable»...

  • Page 13: Current And Temperature Setting

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 16.6. TEC temperature set The «TEC temperature set» pin is an analog input. The «TEC temperature set» is intended for setting the desired temperature of laser module. Apply voltage to the «TEC temperature set» with respect to GND to set the desired temperature. The applied voltage must correspond to the desired resistance of the thermistor.

  • Page 14: How To Get Started

    Laser diode driver current protection threshold (potentiometer DRV OC) 2/5 of max current When first powering up your SF8000, we recommended utlizing a dummy load. You can use any diodes that are suitable for the current set-point you intend to use. A dummy load should be connected as load LD+ to the anode and LD- to the cathode.

  • Page 15: Pid Coefficients

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 Connect a measuring instrument to the «Driver Current Monitor» pin. If it is necessary to increase the limit level, turn the potentiometer DRV OC clockwise for several turns. Turn on the driver. Set the current level to the desired current protection threshold with the potentiometer CURRENT.

  • Page 16: Cooling

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 Larger proportional gain result is larger changes in response to the error, and thus affects the speed at which the controller can respond to changes in the system. While a high proportional gain can cause a circuit to respond swiftly, too high a value can cause oscillations. Too low a value and the circuit cannot efficiently respond to changes in the system.

  • Page 17: Software

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 22. Software We offer software to control the SF8000. You can find it on maimanelectronics.com in the downloads section of the product page. Or contact us at info@maimanelectronics.com. 23. Digital controld description When the input voltage applied the driver is always in analog parameters set, external enable and "...
  • Page 18 Maiman Electronics SF8025, SF8075, SF8150, SF8300 The format of the response: Number of Value Comment byte K (4Bh) Response prefix Number of the parameter Hex-number of the requested parameter ‘space’ symbol (20h) 7-10 Returned value of the parameter Hex-value of the parameter ‘return carriage’...
  • Page 19 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Current set calibration Value 030E (0.01%) Voltage (0.1 V) Measured value 0407 Start (Enable) 0008h Stop (Disable) 0010h Internal current set 0020h External current set 0040h External Enable 0200h State of the driver 0700 Internal Enable 0400h Allow Interlock...
  • Page 20 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Lower limit 0A05 External NTC Upper limit 0A06 sensor temperature Measured value 0AE4 (0.1°C) (1 = 1 K) 0B0E 25/100 Value 0A10 Maximum 0A11 Minimum 0A12 TEC temperature (0.01°C) Maximum limit 0A13 Minimum limit 0A14 Measured value 0A15...
  • Page 21 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Examples 1) For the current value parameter, 0300: To request value, send the following command: "J0300" in text or "4a 30 33 30 30 0d" in hex. Answer will be: "4b 30 33 30 30 20 30 42 42 38 0d" in hex, "K0300 0BB8" in text, 0BB8h > 3000 in dec > 300.0 mA. To set new value, 400 mA (0FA0 in hex) for example, send the following command: "P0300 0FA0"...
  • Page 22 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Fig. 10 – Screenshot from the Termite terminal with commands and answers The maximum duration depends on the set value of the frequency. When you change frequency, a new value of the maximum duration is compute automatically. The duration of pulse cannot be less than 2 ms and more than period of frequency minus 2 ms.

  • Page 23: Digital Control Description (Extended)

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 24. Digital control description (extended) WARNING! Extended protocol recommend for advanced users only. In addition, it might be use for integration of the device with other devices. Use the parameter number 0704h for configure the extended protocol. In extended protocol, you can enable and disable the next options: checksum (CRC 8-bit CCITT), return a new value of parameter after P-type commands, change baud-rate, change protocol-mode (text-plain or binary).
  • Page 24 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Text-plain mode All commands in text-plain mode should be in ASCII. WARNING! If you enable the checksum it will change format of commands. After <CR> symbol you will be write 2 bytes of checksum and last byte will be <LF> (0Ah – “new line” symbol). Checksum is computed for all bytes of command before checksum bytes (including<CR>...
  • Page 25 Maiman Electronics SF8025, SF8075, SF8150, SF8300 Binary mode The binary mode has a significant difference. In this mode, data is exchanged in binary form. Length of any type of command is 8 bytes! In this mode, next options are always enable and you cannot disable it: return a new value of parameter for P-type commands and checksum.

  • Page 26: Troubleshooting Guide

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 25. Troubleshooting guide Problem Potential causes Solution The driver and the temperature controller can only be turned on with shorted Interlock. For more details see paragraph 18.1. The device is in the locked state The device will not work if thermistor is unplugged.

  • Page 27: Mechanical Dimensions

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 26. Mechanical dimensions All dimensions are in millimeters. You can download the 3D-model of the driver on maimanelectronics.com in the downloads section of the product page. 26.1. SF8xxx-10 model for soldering 10-pin Butterfly 26.2. SF8xxx-14 model for soldering 14-pin Butterfly...
  • Page 28 Maiman Electronics SF8025, SF8075, SF8150, SF8300 26.3. SF8xxx-ZIF10 model with Azimuth connectors for 10-pin Butterfly 26.4. SF8xxx-ZIF14 model with Azimuth connectors for 14-pin Butterfly...

  • Page 29: Warranty

    Maiman Electronics SF8025, SF8075, SF8150, SF8300 27. Warranty In compliance with the provisions of Conditions limited warranty the Buyer has the right to guarantee during the one year period. The warranty period comes into effect from the shipping date. The warranty only concerns products that are applied according requirements and for the applications specified in the manual for the product.

This manual is also suitable for:

Sf8025Sf8075Sf8150Sf8300Sf8025-10Sf8025-zif10 ... Show all

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