User Manual - Schulz Electronic GmbH
Contents
1. PIC LAS OCU NG POWER User Manual LDP V 50 100 V3 PicoLAS GmbH Company for Innovative Power Electronics and Laser Technology Kalserstrasse 100 52134 Herzogenrath Distribution Schulz V 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 PICeL AS FOCUSSING POWER TO THE POINT Table of Contents Bb ce soc M 3 HOWTO get started c c X 4 How t connect the LDP V 50 100 V3 5 I emm ass sa rer 6 Maximum Duty Cycle Vs OUTPUT CUFTGDE een 8 C rrent Droop vs Pulse DO Eee ee 8 Internal Structure of the DPF rear rare 8 Howto use ne lateral Ge SUD ONY m 9 PO OU m ee a ee nee ne ne ee re ee 11 Bird een 11 12 PSO UU debs derbe 12 Mechanical Details of the Base Plate sci ciccneccdsenssasesaacnaccansscuansxadeuedlsaatsasesesinaatesanmedensesitanteeuaneagesenauess 13 P c LAS FOCUSSING POWER TO THE POINT LDP V 50 100 V3 03 LDP V 50 100 V3 Driver Module for Pulsed Lasers Rev 12 12 e Compact OEM module e2. 10 15 A gt 20 A 30 A 9 30 A 50 A P c 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 ER C MD ext HV in V HV 0 5926 10 199 0000 2000 4 mZ 0 0370 0 0194 0 0165 0 0088 0 0093 0 0050 go ex 942 ano E Output current in Max duty ET Typical High Max pii cycle with TE CUNT 0 0132 0 0132 0 0074 0 0074 57 1 0 0033 75 6 94 1 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 5 Pulse Duration in us eure 3 s s e _ 15 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 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 di
3. 300 400 500 600 700 800 900 1000 Pulsewidth in ns 9 5 A 10A 15A gt 20 A 30 A 9 40 A 50 LDP V 50 100 V3 Max Reprate vs Pulsewidth internal HV without cooling 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 9 5 A 8 10A 15A 20 A 30 A 9 30 A 50 Repetition rate in kHz Repetition rate in kHz P c LAS FOCUSSING POWER TO THE POINT LDP V 50 100 V3 Max Reprate vs Pulsewidth external HV with cooling 10 000 1 000 100 10 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 5 10 15 gt 20 A 30 A 9 40 A 50 LDP V 50 100 V3 Max Reprate vs Pulsewidth external HV without cooling 10 000 1 000 100 10 1 0 100 200 300 400 500 600 700 800 900 1000 Pulsewidth in ns 9 5 A
4. 3 to 50 A output current lt 4 time 12 nsto 10 us e ngle 15 V supply Ignition Rangefindi Technical Data Output current Max output voltage int High voltage Rise time Trigger delay Min pulse duration Max pulse duration Trigger range Ch1 S mw 2 M 20 0ns 10 0GS s IT 4 0ps pt A Chi x 300mV Trigger input Trigger output Figure Current monitor output scale 10 A Div infinn Current monitor Product Description ee The LDP V 50 100 V3 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 59 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 which is required for operation Additionally you can upgrade the LDP V with the PLCS 21 controller to enable USB2 0 Max Power Dissipation Dimensions Weight Operating temperature change without further notice See manual for detailed information e Pulse width control via MC trigger input e Rep ratesfrom si
5. g 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 Ch1 5s00mY 2 M 5 0ns 10 0GS IT 5 Ops pt Chi x 800mVv Typical Pulse Rise and Fall Times of LDP V 50 100 V3 scale 10 A Div 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 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 the supply voltage and temperature are kept constant Ch1 1 0 Q Ch2 2 04 M 40 0ns 5 0GS s IT 80 0psp Chi x 350mV Typical trigger delay of LDP V 50 100 V3 PICeLAS 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 t
6. ngle shot to 2 MHz e Current monitor and isolated monitor e Applications LIDAR Measurements ng Biochemistry 3 50A 100 V 0 100V 1A 15W typ 2 3 ns max 4 ns typ 36 ns max 40 ns 12 ns gt 1 us 50 A gt 10 us 5 A single shot to 2 Mhz refer to diagram with operating limits 5 V into 50 via SMC jack galvanically isolated Rogowski coil 20 A V into 500 12 15V 2 2A Optional 0 100 V 30 W external high voltage 25 W 75x44 x 20 mm 769 20to 55 C Measured into a short instead of laser diode Technical data is subject to communication with a PC or the external Optional Accessories anes operating unit PLB 21 fae LDP V KIT P c LAS FOCUSSING POWER TO THE POINT How to get started Step 2 width to the selected triggering Input 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 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 to a high overshoot during sur on turn off This voltage of up to 100 V may damage
7. o 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 Chi x 360rmN Absolute Maximum Ratings Supply voltage range 10 18 V Max voltage at HV Pin 100 V Max output current U monitor NTC 1 mA Input voltage range Disable 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 12 2 i FOCUSSING POWER TO THE POINT Mechanical Details of the Base Plate All dimensions in millimetres 3 20 THRU DIN 974 6 00 X 3 20 3 20 THRU DIN 974 6 00 X 3 20
8. ode 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 the laser diode compliance voltage Ucomp and its differential resistance ie PiIc LAS FOCUSSING POWER TO THE POINT The laser diode current is measured with current sensing resistors current monitor output and with the galvanically isolated rogowski coil Disable and trigger input provide 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 Dg prevents the laser diode from reverse currents 10 NTC provides the possibility to monitor the pulser temperature An over temperature protection is NOT integrated on the driver s 18 90V LE LD Pin 5 Disable Poti mall pu Y Pin 10 Ext HV setpoint Pin 2 HV Pin 8 U Monitor HV Adjust Poti Pin 4 15 V Pin 7 Disable Pin 1 3 GND Pin 6 Trigger Rogowski Coil Trigger SMC Pin 9 NTC Current Monitor Rog owski Coil How to use the Internal HV DC Supply The LDP V series pr
9. ovides a high power up to 15 1 A 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 Security Advise FOCUSSING POWER TO THE POINT Do not touch any leads of the output or the output capacitors as they are connected to high voltage of Up to 100 V 10 PiIc LAS FOCUSSING POWER TO THE POINT 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 cablin
10. the device Adjust the value of the desired pulse current turn the poti clockwise until the current reaches 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 AS FOCUSSING POWER THE POINT How to connect the LDP V 50 100 V3 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 Boe XE Connections via Pinheader Description GND Ground return 3 4 Supply Voltage connect to a power supply Disable_Poti Disables the internal HV setpoint poti when set high Trigger Input into 50 Ohm 7 Disables the Pulser when set high 8 U Monitor High volage monitor output scale 40 mV V for supervising the actual high voltage 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 Outp
11. ut The current monitor output has a scale of 20 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 at the rectangular pads on top Anode and bottom Cathode of the pulser 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 P c LAS FOCUSSING POWER TO THE POINT Operating Range Diagram Repetition rate in kHz Repetition rate in kHz 10 000 1 000 100 10 000 1 000 100 LDP V 50 100 V3 Max Reprate vs Pulsewidth internal HV with cooling I ttt _ 100 200
Download Pdf Manuals
Related Search