User Manual - Schulz Electronic GmbH
Contents
1. 100 0 4 T z FN 10 0 N E gt Cass o 5 c 2 5 Q rd 1 0 0 1 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 9 2 5 A 8 3A 4 A 6A PHBA 9 10 A 13A LDP V 40 70 Max Reprate vs Pulsewidth 100 0 7 I i gj 100 St Ssss o 5 c 9 t Q 1 0 i 0 1 1 __ __ S _ _ 11 IY OS OY Yt tt 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 9 8 A 10 A 15 A 20 A 725 A 9 30 A 40 A Pic LAS FOCUSSING POWER TO THE POINT Maximum Duty Cycle vs Output Current The following tables show the maximum allowable duty cycle depending on a given output current LDP V 10 70 Output current in A Maximum duty cycle Typical High with internal HV Voltage in V 2 5 0 0320 18 5 3 0 0 0222 21 5 4 0 0 0125 27 5 6 0 0 0056 39 6 8 0 0 0031 51 6 10 0 0 0020 63 6 LDP V 40 70 Output current in A Maximum duty cycle Typical High with internal HV Voltage in V 8 0 0098 17 2 10 0 0063 20 6 15 0 0028 29 2 20 0 0016 37 7 25 0 0010 46 3 302. 10 THQ GOR INPUT iesise iese taninan aE EAE nati saben E S 11 Absolute Maximum Ratings ssssssssssssssesseesee eene nenne nnn nnn nennen nnns 11 Pic LAS FOCUSSING POWER TO THE POINT Rev 09 01 valid from April 2009 LDP V 10 70 Ultra compact Driver Module for Pulsed Lasers e Ultra compact OEM module 32x15mm e 2 5 to 13 A output current e lt 4 ns rise time e Pulse width control via trigger input 15 ns to 1 ps e Rep rates from single shot to 100 kHz e Single 15 V supply e Current monitor e Applications LIDAR Measurements Ignition Rangefinding Biochemistry Technical Data Output current 2 5 13A Max output voltage 70V int High voltage 15 70V 0 1A 3W Rise time typ 3 ns max 4 ns Trigger delay typ 36 ns max 40 ns Min pulse duration 10 ns Max pulse duration 1 us Trigger range single shot to 100 kHz refer to diagram with operating limits LE Ri X a Max Duty factor 0 1 96 Figure Current monitor output scale 2 A Div Trigger input 5 V into 50 Q via SMC jack Current monitor 2 A V into 500 RS Supply voltage 15V 02A Product Description Max Power Dissipation Tow The LDP V 10 70 is the smallest availiable source oa i Kis opem for nanosecond pulses The device is optimized Operating temperature E to 55 C for size and functionallity integrating a HV DC Measured into a short instead of laser diode Technical data is subject to source and the pulsing s
3. Pic LAS POWER TO d it User Manual om LDP V 10 70 LDP V 40 70 Before powering on your unit read this manual thoroughly and make sure your understood it fully Please pay attention to all safety warnings If you have any doubt or suggestion please do not hesitate to contact us PicoLAS GmbH Company for Innovative Power Electronics und Laser Technology KaiserstraBe 100 52134 Herzogenrath Schulz V Electronic Professional Power Supplies Tel 49 0 2407 563 58 0 Schulz Electronic GmbH Dr Rudolf Eberle Strabe 2 Fax 49 0 2407 563 58 29 D 76334 Baden Baden Fon 49 7223 9636 30 E Mail info picolas de ee vertrieb schulz et ctronic de Web www picolas de Pic LAS FOCUSSING POWER TO THE POINT Table of Contents EDP V 10 70 Data Sheet use tec le tare hand pute e HR pum ced beet v tio E edis 3 LDP V40 70 Data SNE areae tieu MUS II DM AM D E EE E 4 How to GetStarted ous cente atcecsetuseie s shut oU IL NIU eee eee 5 How to connect the LDP V 10 40 70 ssssssssssssssseeseeee eee eene entere nennt nnn enne 6 Operating Range Diagrami eoe t tecti ted recte Ie dure e Pep td deese pa M tai dug eecuas 7 Maximum Duty Cycle vs Output Current eene nnn nnne 8 Internal Structure of the LDP V ssssssssssssssseseeeeeeeeneneeneen eene eene enne enne ens 9 How to Use the Internal HV DC Supply ssssssssssssseeeme eene 10 QUIS n
4. 0 0007 54 8 40 0 0004 71 9 Pic LAS FOCUSSING POWER TO THE POINT Internal Structure of the LDP V The LDP V series generates the pulses by a simple but efficient principle First the storage capacitors Cs are charged through the internal HV DC supply When a pulse is applied at the trigger input the high speed mosfet opens and the current flows from the capacitor through the laser diode mosfet and current sense resistors At the end of the pulse the mosfet closes again and the current stops The generated current depends on the applied high voltage the laser diode compliance voltage and its differential resistance The following formulas give a good estimation of the laser diode current depending on the driver s high voltage supply Uy the laser diode compliance voltage Usomp and its differential resistance Ag U py SU LDP V 10 70 4 5 6 Rip T Ray The laser diode current is measured with current sensing resistors I Mon The trigger input provides full control of the driver s pulsing capability to the user The required DC high voltage is generated with the integrated HV DC supply The internal supply is controlled by the HV setpoint potentiometer or via the U HV Ctrl Pin 6 pin The Diode Dpp prevents the laser diode from reverse currents An over temperature protection is NOT integrated on the driver Pin 6 U HV Ctrl Pin 5 15 V Pin 3 Trigger In 50 R Driver Pin 1 1 Mon Pin 2
5. 4 GND Internal Structure of the LDP V 10 40 70 Pic LAS FOCUSSING POWER TO THE POINT How to Use the Internal HV DC Supply The LDP V series provides an internal high voltage supply up to 2 5 W 0 1 A 70 V To adjust the laser diode current to the desired value follow the steps below 1 Turn the potentiometer fully counterclockwise 2 Apply the 15 V supply voltage 3 Start pulses 4 Measure the diode current 5 Adjust the level of the high voltage supply hence the level of the current by turning the potentiometer clockwise The HV DC Supply can also be controlled through an external setpoint signal on pin 6 of the pinh eader U HV Ctrl A Signal level of 0 V equals the high voltage which is currently adjusted by the internal potentiometer a signal level of 10 V equals the minimum high voltage Security Advice Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of up to 75 V Pulse Output The LDP V series provides ultra rapid pulse rise and fall times in the region of several nanoseconds However pulse rise and fall depend on the parasitic stray inductance of the cabling towards the laser diode Direct connection without any kind of wires to the module is absolutely necessary for best results For detailed information about the effect of the laser diode connection on the pulse shape please refer to PicoLAS Application Notes 2 and 3 Chi 500mv Q
6. M5 0ns 10 0GS s IT S Opsipt A Chl 800m Typical Pulse Rise and Fall Times scale 10 A Div 10 Pic LAS FOCUSSING POWER TO THE POINT Trigger Input The trigger input on the pin header Pin 3 is terminated with 50 Ohm to ground The trigger source has to be able to provide a signal level of 5 V with a 50 Ohm load The delay between the triggering signal and the load current is very low around 36 ns and very constant The pulse to pulse jitter is very stable below 1 ns if supply voltage and temperature are kept constant L s i Chi 10V Q Ch2 20v M 40 0ns S 0GS s IT 80 0psipt A Chi 360mv d Typical trigger delay of LDP V 10 40 70 Absolute Maximum Ratings Supply voltage range 12 18V Max voltage at HV Pin 75 V Input voltage range U HV Ctrl O 10 V Input voltage range trigger input O 10 V Security Advice Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of up to 75 V 11
7. negative signal trigger on negative falling edge scale 200 mV div Pin Name Description 1 mon Current monitor output into oscilloscope 50 Ohm negative signal Scale 2 AN for the LDP V 10 70 and 20 AW for the LDP V 40 70 2 GND Ground return 3 Trigger In Trigger Input 5 V into 50 Ohm 4 GND Ground return 5 15V Supply Voltage connect to a power supply 15 V DV 6 U HV Ctrl External HV setpoint input allows control over the internal HV DC source Trigger Input The trigger input requires a signal level of 5 V and is terminated with 50 Ohm Current Monitor Output The current monitor output has a scale of 2 A V for the LDP V 10 70 and 20 A V for the LDP V 40 70 with a negative signal output It has a source impedance of 50 Ohm and must be terminated with 50 Ohm to achieve the correct scale Laser Diode Connection The Laser Diode connection is designed for a 3 pin housing e g TO 52 The Pad for the cathode connection is located on the bottom side of the driver the anode pad is on top The third pad is not connected Security Advice Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of up to 75 V Pic LAS FOCUSSING POWER TO THE POINT Operating Range Diagram LDP V 10 70 Max Reprate vs Pulsewidth
8. or signal and Pin 2 for negative falling edge scale 200 mV div ground 6 Apply the supply voltage Connect a 15 V DC power supply to Security Advice Do not touch any leads of the the pin header See page 5 for details output or the output capacitors as they are Note Some power supplies show a connected to a high voltage of up to 70 V voltage overshoot during turn on turn off This may damage the driver Please make sure that your supply does not have any voltage surges when powered on or off 7 Adjust the value of the desired pulse current Turn the potentiometer clockwise until the current reaches the desired level 8 Disconnect the supply remove the short at the Pay attention to correct polarity output and connect the laser diode Anode 1 top Cathode bottom 9 Reconnect the supply and check the optical Note The actual current is always some output of your laser diode percent lower than the value adjusted in step 7 Fine adjust the current now by means of turning the potentiometer Pic LAS FOCUSSING POWER TO THE POINT How to Connect the LDP V 10 40 70 Pin 5 connect input supply voltage Pin 6 15V External HV setpoint Output LDP U 10740 70 LE RU Pin 3 Trigger in EANAN Laser Diode Connection Anode Potentiometer to Pin 2 adjust value of HV DC Pin 4 Ground GND Pin 1 connect oscilloscope impedance 50 Ohm here In order to monitor diode current yields
9. tage into only 4 8 cm change without further notice Its typical application is driving pulsed laser See Manual fordetailed information diodes Those can be mounted directly onto the LDP V eliminating the need for strip lines The diode must be electrically isolated from earth chassis ground Despite its small size the LDP V is designed for ease of use It eliminates the need for multiple peripheral supply units A single 15 V DC supply and a triggering signal are all which is required for operation Pic LAS FOCUSSING POWER TO THE POINT LDP V 40 70 Rev 09 01 valid from April 2009 Ultra compact Driver Module for Pulsed Lasers i tht 500mv Q M200ns5 0GS IT400psipt A Chl 700mV Current monitor output scale 10 A Div Product Description The LDP V 40 70 is the smallest availiable source for nanosecond pulses The device is optimized for size and functionallity integrating a HV DC source and the pulsing stage into only 4 8 cm Its typical application is driving pulsed laser diodes Those can be mounted directly onto the LDP V eliminating the need for strip lines The diode must be electrically isolated from earth chassis ground Despite its small size the LDP V is designed for ease of use It eliminates the need for multiple peripheral supply units A single 15 V DC supply and a triggering signal are all which is required for operation e Ultra compact OEM module 32x15mm e 8 to 40 A ou
10. tput current e lt 7 ns rise time e Pulse width control via trigger input 15 ns to 1 us e Rep rates from single shot to 100 kHz e Single 15 V supply e Current monitor e Applications LIDAR Measurements Ignition Rangefinding Biochemistry Technical Data Output current Max output voltage int High voltage Rise time Trigger delay Min pulse duration Max pulse duration Trigger range Max Duty factor Trigger input Current monitor Supply voltage Max Power Dissipation Dimensions Weight Operating temperature 8 40A 70V 15 70V 0 14 3W typ 6 ns max 7 ns typ 36 ns max 40 ns 15 ns 1 us single shot to 100 kHz refer to diagram with operating limits 0 1 96 5 V into 50 Q via SMC jack 20 A V into 50 Q 15V 02A 2W 32x15x8mm 4g 20to 4 55 C Measured into a short instead of laser diode Technical data is subject to change without further notice See manual for detailed information Pic LAS FOCUSSING POWER TO THE POINT How to get started Step What to do Check 1 Unpack your Device 2 Make a short at the output Clamp input to output or sold a wire 3 Turn the High voltage to the lowest value turn potentiometer fully counterclockwise 4 Connect a Pulse source with the desired pulse width to the triggering Input e g 100 ns 100 Hz repetition rate 5 Connect your oscilloscope to the current Select 50 Ohm termination trigger on monitor output Pin 1 f
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