User Manual - Schulz Electronic GmbH
Contents
1. 100 200 a a a a E _ _ ___1 _ 300 400 500 600 700 800 Pulsewidth in ns O0 5A 1 0 A 1 5 A gt 2 0 A 2 5 A 8 30 A 3 5A 900 1000 PiIc LAS FOCUSSING POWER TO THE POINT LDP V 03 100 UF3 Max Reprate vs Pulsewidth external HV with cooling 10 000 1 000 N I 5 400 E Q cc 10 1 u u ET DE n 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns O 0 5A 1 0 A 1 5 A 2 0 A 2 5 A 3 0 A 3 5A LDP V 03 100 UF3 Max Reprate vs Pulsewidth external HV without cooling 10 000 1 000 N T x 52. PIC LAS POVVER User Manual ais LDP V 03 100 UF3 PicoLAS GmbH Company for Innovative Power Electronics and Laser Technology Kalserstrasse 100 mamm E 52134 Herzogenrath Schulz Y Electronic Schulz Electronic GmbH Dr Rudolf Eberle Stra e 2 D 76534 Baden Baden Fon 49 7223 9636 0 Fax 49 7223 9636 90 vertrieb schulz electronic de www schulz electronic de PiIc LAS FOCUSSING POWER TO THE POINT Table of Contents EDR VOT OOUT cach pages eon ee ce oot tect cheek anton tae sta Sateen ei acon eras decsermmtaaies 3 How to connect the LDP V 03 100 UF ar a en aa 5 Sra CGI GS Aa scarey nee atiatuciat ad arid ste aidenucatead suedatacuniauedssudshadaqud sued sud shedead sted pudteduued eudysinenads 7 Maximum DULY Cycle vs OUT DUT CUFT CIE ee ee nee 9 C rfrent Droop vs Pulse DUratiO i ers euere 9 irera ocur OF Che EOP e a a ee a aan 10 How touse tnelnternmalEV DE SUB pP Yale 11 POLE OULD OL ee re ee ea are 11 ENGIEL INPUT nano esse Rear NEBEN E 12 TGCS OUP DUT MORD ee ae nee een 13 PSO RUE Vai LING Seesen ee nee ne reinen 13 Mechanical Details of the Base Plate een VA PiIc LAS FOCUSSING POWER TO THE POINT Rev 12 12 LDP V 03 100 UF3 Driver Module for Pulsed Lasers e Compact OEM module e 0 3t0 3A diode current e lt 1 2nsrisetime e Pulse width control via MCtrigger input 1 nsto gt 10 us e Rep ratesfrom single shot to 35 Mhz e Sngle 15 V supply e Current monitor and isolated mo
3. DIN 974 6 00 X 3 20 14
4. 2 A V 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 can either be connected via the mounting holes on the top side of the pulser inner hole Anode outer hole Cathode or atthe rectangular pads on top Anode and bottom Cathode ofthe pulser Security Advise FOCUSSING POWER TO THE POINT Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of Up to 100 V P c LAS FOCUSSING POWER TO THE POINT Operating Range Diagram Repetition rate in kHz Repetition rate in kHz 10 000 1 000 100 10 10 000 1 000 100 10 LDP V 03 100 UF3 Max Reprate vs Pulsewidth internal HV with cooling 100 200 a a _ _ __1_ _1 _ 300 400 500 600 700 800 Pulsewidth in ns O 0 5A 1 0 A 1 5 A gt 2 0 A 2 5 A 8 30 A F 3 5A LDP V 03 100 UF3 Max Reprate vs Pulsewidth internal HV without cooling 900 1000
5. times the rise time of the trigger must be as short as possible Shortest pulse durations are guaranteed with rise times below 200 ps There is no Schmitt Trigger inside the LDP V 03 100 UF3 12 P c LAS FOCUSSING POWER TO THE POINT Trigger Output Monitor The Trigger Output signal is generated with an integrated isolated Rogowski Coil and provides an ultra fast galvanically isolated signal The signal shape is proportional to the derivative of the load current It can be used for a current response triggering signal and has no delay to the load current Combined with an integrator it is possible to use this signal for a galvanically isolated current monitor The isolation barrier is suitable for voltages up to 100 V and prevents unwanted ground loops Signal of the Rogowski Coil True load current Positive edge at pulse begin Negative edge at pulse end Ch1 s00mY amp Ch2 2 04 M40 0ns5 0GS s IT 4 0ps pt Chi x 370mY Absolute Maximum Ratings Supply voltage range 10 18 V Max voltage at HV Pin 100 V Max output current U monitor NTC 1mA Input voltage range Disable_Poti Ext_HV_Setpoint o 5 V Input voltage range trigger input Disable o 15 V Security Advise Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of Up to 100 V FOCUSSING POWER TO THE POINT Mechanical Details of the Base Plate All dimensions in millimetres 3 20 DURCH
6. 100 Q cc 10 1 n 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 0 5 A 1 0 A 1 5 A gt 2 0 A 2 5 A 8 30 A 35 A PiIc 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 With active cooling of the baseplate Output os in Max duty cycle Typical High Max duty cycle with B ext HV aaameg in V _ am HV 1 zoo un 1 TH 0 40 27 0 0 40 39 7 a a O o Without cooling of the baseplate E ext HV in V m HV O on O en 2 0 0 04 0 03 0 03 Current Droop vs Pulse Duration The following table shows the absolute output current droop in A versus pulse length Pulse durations shorter than one microsecond are not considered as the droop is typically lower than 1 Pulse Duration in us P Pulse Durationinus Typical performance of the LDP V The following table shows the typically achieved pulse performance using different pulse sources Typ Output risetime 0 2 A Typ Output risetime 2 3 A N 900 ps 1 1 NS lt 100ps rise time PLCS 21 with SMC SMC Trigger 900 ps 1 8 ns cable Low performance Signal gt 5NS gt 5NS generators P c 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 c
7. Pin 2 HV Pin 8 U Monitor HV Adjust Poti sci E CE E Pin 4 15 V gt t 18 90 V EEE LD V Pin 5 Disable Poti zu AN Dap N Pin 10 Ext HV setpoint Bene Pin 1 3 GND DS u EN gt N Trigger SMC Driver 50 R Pin 9 NTC Current Monitor ii Res Rogowski Coil Rogowski Coil 10 P c LAS FOCUSSING POWER TO THE POINT How to use the Internal HV DC Supply The LDP V series provides a high power up to 15 W 1A 100 V internal high voltage supply To adjust the laser diode current to the desired value follow the steps below Notice Make sure that the solder junction is done to activate the HV DC Supply 1 Turn the poti 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 poti clockwise Since Version 3 of the LDP V series the HV DC Supply can also be controlled through an external setpoint signal on pin 10 of the pinheader Ext_HV_Setpoint the scale is 25V V To enable the external setpoint pin and disable the internal poti pin 5 Disable_Poti of the pinheader has to be set to high Otherwise the internal poti will override the external signal The high DC voltage can be monitored at pin 8 U Monitor with a scale of 40 mV V Note Older versions are not capable of these features and the above mentioned pins have to be left unconnected Secu
8. ches the desired level Disconnect the supply remove the short at the output and assemble the Laser Diode Polarity Reconnect the Supply and check the optical Note The actual current is always some output of your Laser Diode percent lower than the value of step 7 Adjust the current with help of the poti P c LAS FOCUSSING POWER TO THE POINT How to connect the LDP V 03 100 UF3 Solder junction to activate Rogowski Coil the internal HV supply Poti to adjust value of HV DC Pin 10 Laser Diode Pinheader Connection Pin 2 Trigger Input SMC Current monitor output er FAR 25 Connections via Pinheader Ground tn return HV External high voltage supply Input 0 100 V SE connecting an alternative HV DC supply See page 9 for details Supply Voltage connect to a power supply CE Disable_Poti Disables the internal HV setpoint poti when set high 7 Disable Disable Not Not connected 8 U Monitor High volage monitor output scale 40 mV V LS supervising the actual high voltage NTC Internal 10 kOhm NTC versus GND for temperature monitoring B value 3620 10 Ext_HV_Setpoint External HV setpoint input scale 25 V V allows control over the internal HV DC source These pins had to be left unconnected in older versions then V3 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
9. harged whether through the internal HV DC supply or an external high voltage source 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 pulser s high voltage supply Uy the laser diode compliance voltage Ucomp and its differential resistance Raitt U mw u one m 23 64 Rig The laser diode current is measured with current sensing resistors current monitor output and with the galvanically isolated rogowski coil Trigger input provides full control of the driver s pulsing capability to the user The required DC high voltage can either be applied through an external voltage source or it can be generated with the integrated HV DC supply The internal supply is controlled by the HV setpoint poti or when the Disable_Poti Pin 5 pin is set high via the Ext_HV_setpoint Pin 10 pin A voltage monitor Pin 8 provides feedback of the high dc voltage The Diode Dpp prevents the laser diode from reverse currents a 10kR NTC provides the possibility to monitor the pulser temperature An over temperature protection is NOT integrated on the driver
10. nitor e Applications LUDAR Measurements Ignition Rangefinding Biochemistry Technical Data ey Chi Z00m 2 M 10 0ns 10 0GS4 IT 10 0psipt A Chi x 300mY Figure Current monitor output scale 0 4 A Div Product Description The LDP V 03 100 UR is a small and inexpensive source for nanosecond pulses The device is optimized for pulse repetition from single shot up to MHz repetition with duty cycles up to 100 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 Compatible packages TO 18 TO 5 TO 52 5 6 mm 9 mm and similar 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 what is required for operation Additionally the LDP V can be extended with the PLCS21 controller to enable USB2 0 communication with a PC or the operating unit PLB 21 Output current Max output voltage int high voltage Rise time Trigger delay Min pulse duration Max pulse duration Trigger range Trigger input Trigger output Current monitor Supply voltage Max power dissipation Dimensions Weight Operating temperature Measured into a short instead of laser diode Technical data is subject to change without further no
11. rity Advise Do not touch any leads of the output or the output capacitors as they are connected to a high voltage of Up to 100 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 to 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 s00rmy 2 M 20n 10 0654 IT 4 0ps pt A Chi 3 Orm4 Typical Pulse Rise and Fall Times of LDP V 03 100 UF3 scale 1 A Div P c LAS FOCUSSING POWER TO THE POINT Trigger Input The trigger input both on the pin header and the SMC jacket 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 leus ENS we LOS A re gt A gt a 15 524 0 0 2V Y A i m 7 T Time lt gt lt 200 ps Trigger signal demands Notes A Exceeding 0 2 V during pulse pause will cause a non proper turning off and thermal damage B If the Trigger altitude is below 4 5 V the device will not turn on properly and can not carry the full current Exceeding 5 2 V can damage the power stage and will yield in us trailing after turn off C To achieve best rise
12. tice See manual for detailed information 0 3 3A max 3 5 A 100 V 0 100 V 1A 15 W typ 800 ps max 1 2 ns typ 2 5 ns max 4 ns 1 ns gt 10 us single shot to 35 Mhz refer to diagram with operating limits 5 V into 50 via SMC jack galvanically isolated Rogow ski coil 2 0 A V into 50 Q 12 15VDC 2 2A optional 0 100 V 15 W external high voltage 15 W 75x44 x 20 mm 769 20 to 55 C FicoLASstrongly recommends the use of the PLCS21 to achieve best results Optional Accessories PLCS 21 PLB 21 LDP V BOB LDP V KIT P c LAS FOCUSSING POWER TO THE POINT How to get started Step 2 What to do Check Unpack your Device Make a short at the output Turn the High voltage to the lowest value turn poti fully counterclockwise Connect a Pulse source with the desired pulse e g 100 ns 100 Hz reprate width to the selected triggering Input J P Connect your Scope Select 50 Ohm termination trig on neg falling edge 200 mV div Apply the supply voltage Connect a 15 V DC power supply to the Security Advise pinheader See page 5 for details Do not touch any leads of the output or the Note Some supplies have a voltage output capacitors as they are connected toa high overshoot during turn on turn off This voltage of up to 100 V may damage the device Adjust the value of the desired pulse current turn the poti clockwise until the current rea
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