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laser driver 3 amp 20 v 5ns rise time

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To maintain a 5ns rise time right through to your laser will be difficult. What capacitive load does it present? I think you will need your power amplifier wired directly to the laser and feed it via a piece of 50 ohm coaxial from the preamplifier.

Thank you for the reply.l will try to get the capacitive loading specification. iC-Haus has one very close but not enough voltage.They recommended a cascade transistor to follow but had no design or recommendation.


I know the iC-Haus products quite well. But what kind of laser are you going to use?
Is it really a 20V diode? It sounds very high. As for the driver, I think you are referring to iC-HG,
which can drive 9A in pulse mode and go to sub ns rise time with the proper diode.
I think you should start by explaining everything and at least put a link to your diode.
(or your laser).


Hello dougmc,

you can achieve with the iC-HG laser current switch rise times below 1ns, if you have a proper designed layout and interconnection with low inductance ( see: ). The maximum driver voltage needs to be less than 12V. Laser diodes are in some cases switched on with higher voltages to get faster rise times, however the with a current switch and low impedance in the signal path this is not needed.

Enjoy your design work!

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