FMT DRV V2 High Power Laser Diode Driver User`s Manual
Contents
1. FMT DRV V2 High Power Laser Diode Driver User s Manual Thank you for purchasing the FMT DRV V2 boost buck constant current output laser diode LED driver Specs Max output current in boost mode 2A at 5V at the output and 3 7V input Max output current which has been tested buck mode 2 4A at 4 5V at the output and 5 5V input Max output voltage 5 5V 6V possible but you are pushing the IC s limits Input voltage white pcb 2 7V to 5 5V 6V possible but you are pushing the IC s limits Input voltage red pcb 3 0V to 5 5V 6V possible but you are pushing the IC s limits PCB Size 15 8mm diameter 2 holes for input wires to go through the heatsink pill Overvoltage protection at the output 6 4V Low battery cutoff protection 2 7V 3V Load disconnected protection Over temperature protection Short Circuit Protection at the output If using a battery as power source You must use e Good quality high capacity 2800mAh or better 3 7 Li lon battery for full range of output currents e SAMSUNG 3000mAh or Panasonic NCR18650 3000 3100mAh recommended e A123 3 6 LiFePo4 High Discharge battery for low to mid range of output currents e 3x1 2V Ni MH high capacity batteries for lower output currents less than 1A If using PSU as power source You must use e A power supply capable of delivering at least 4A of current This is a 4A Switch IC so at maximum output current the regulator is drawing almost 4A fr2. below the point it can deliver enough juice to the driver for a fully regulated output This doesn t affect the performance of the driver in anyway It s just the sound Note that older people have the tendency to lose the ability to hear some of the high frequencies So some of you might not hear it My parents are a perfect example of that D cheers Disclaimer The FMT DRV is assembled and tested on oscilloscope prior to shipping to ensure a perfect working condition don t take responsibility for improper handling reverse polarity not heatsinking short circuiting operating the driver outside it s specs tampering with the Rset resistors or any other components or any other USER fault causing damage to the driver or your application Before using the driver in your final project always use a test dummy load for testing Contact Info Skype foulmist Email foulmist abv bg Laserpointerforums com username foulmist FMT DRV V2 last revision 18 Sept 2012
3. om the power source around 3 5A actually Driver s bottom pad is connected to the Input negative GND and must be used as a heatsink base Apply a thin layer of thermal paste thermal silicone and attach it to aluminum copper heatsink for cooling See picture for the correct way of connecting before using N GROUND 4 INPUT POSITIVE wal Jaf 4 h OU DRG PWM 1Hz to i NEGA TIA Fi 530Hz only PNT EALA 5 a 1 good soldering skills and appropriate resistors 1206 package The yellolw mark shows the two Output current for ula places for the sense resistors 1206 size package resistors are required For higher currents above 1A Two a 4 resistors stacked in parallel is S recommended You can use a single R total 1A ARI aC Ra 1206 package resistor for currents 7 y PEN i 1 below 1A Maximum current that has G been tested is 2A at 5V boost and 2 4A buck output Going further is not guaranteed to work except for a 3 3V output or lower If you decide to change the resistors do that at your own risk GND I amps 0 5 volts 7 R ohms RESISTOR R1 SENSE ak Battery cut off voltage is set to 3 0V and operation of the driver will stop when your battery s voltage drops to that point preventing your battery from over discharge You may notice a distinct high frequency sound coming from the driver when the battery voltage drops
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