PICOLAS LDP-AV 4N55-90 User Manual Download | Manualshive

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LDP-AV D06-N20

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Summary of Contents for LDP-AV 4N55-90

Page 1: ...User Manual LDP AV 4N55 90 PicoLAS GmbH Burgstr 2 52146 Würselen Germany Phone 49 0 2405 64594 60 Fax 49 0 2405 64594 61 E mail info picolas de Web www picolas de Rev 1911 ...

Page 2: ...n of the Laser Diode 7 How to connect the Driver 8 Pulse Input 9 Channel Selection 9 Power Supply Requirements 10 Trigger Output Monitor 10 Current Consumption 11 Cooling 11 Power Losses 11 Recommended Operating Conditions 12 Absolute maximum Ratings destroying limits 12 Output Power 13 Mechanical Dimensions 14 ...

Page 3: ...3 LDP AV D06 N20 ...

Page 4: ...ay cause damage to the electronic components Before powering on your driver unit read this manual thoroughly and make sure you have understood everything Caution High voltages up to 100 V are present at several PCB components Do not touch during operation Please pay attention to all safety warnings If you have any doubts or suggestions please do not hesitate to contact us ...

Page 5: ...e is no built in protection circuit Do use power up sequencing Allow the 5 V supply voltage to fully ramp up before applying any other voltages HV Trigger Input Do not use mechanical force on the PCB components as they are fragile Resulting damages are not covered by warranty Beware Some lab power supplies cause excessive ringing during powering on and off These may damage the unit Do keep connect...

Page 6: ...er for further details 5 Connect the pulse generator to the SMA trigger input jack Ensure that no pulse is fed before powering up the unit 6 Carry out the power up sequence as follows 1 Fully ramp up the 5 V rail 2 Enable the HV supply Then feed a pulse signal to the input terminal For example 5 V amplitude 100 µs pulse width and 1 kHz repetition rate Security advice Do not touch the PCB component...

Page 7: ...m load not only includes the diode itself but also the packaging bond wires and the connection between the driver and the diode However PicoLAS has no influence on these parts Refer to the PicoLAS Application Notes Impedance of Diodes and LD Connections for more information on parasitic elements and their effect on the pulse shape If you need different pad sizes for your laser diode please do not ...

Page 8: ...inated with 50 Ohms 4 Sync out Sync out signal Rogowski coil 5 INH Leave this pin floatend for normal operation Connect to logic level high to turn all channels off 6 BIT0 Binary channel selection A 7 BIT1 Binary channel selection B 8 GND Ground return 9 GND Ground return 10 HV External high voltage supply input 0 95 V Security Advice Do not touch any leads of the output or the output capacitors a...

Page 9: ...n internal multiplexer which allows to select a specific channel thus a laser diode For the selection of one specific laser diode see following table BIT1 BIT0 Channel laser diode 0 0 0 0 1 1 1 0 2 1 1 3 Table 1 Description How to select a specific channel Figure 3 Close up of the laser diode footprint and their indicators This driver is capable for individual coding methods Therefore the LDP AV 4...

Page 10: ...V in there are two blue LEDs included They indicate that the power supply is turned on Figure 4 Close up of the laser diode driver and LEDs Note The HV laser diode supply can be interrupted at any time e g for safety reasons by the customer Trigger Output Monitor The trigger output signal is generated with an integrated isolated Rogowski coil and provides an ultra fast galvanically isolated signal...

Page 11: ... unit to a heat sink which is capable to take out the heat The heat sink is suitable if the system temperature does not exceed the maximum operating limits Power Losses Due the structure of this driver the power losses of this driver can be approximately estimated with following equation A W V I t f V P HV out pw rep HV LOSS 05 0 Where LOSS P Total average power consumption W HV V High voltage sup...

Page 12: ...el selection Min Typ Max Unit BIT0 BIT1 input logic high 2 0 5 0 5 2 V BIT0 BIT1 input logic low 0 8 0 V Address transition time 1 0 MHz Absolute maximum Ratings destroying limits Supply voltages Min Max Unit HV 0 95 V 5 V 0 5 2 V Trigger input Min Max Unit Trigger signal voltage unterminated 0 5 2 V Trigger Signal Note that the maximum ratings for both pulse width and repetition rate depend on th...

Page 13: ... each channel Many elements and parasitic stray components may affect the performance of the driver unit The stray inductance of the load connected to the driver is very important The term load not only includes the diode itself but also the packaging bond wires and the connection between the driver and the diode However PicoLAS has no influence on these parts Refer to the PicoLAS Application Note...

Page 14: ...14 Mechanical Dimensions Figure 6 Mechanical dimensions of LDP AV 4N55 90 ...

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