Hello, Im thinking on buying this driver on my 2W m140 diode, the Mosfet is rated at 2 amps so ill have to use heatsink on it, but I asked seller and he said that soft start is about 40ms wich is kinda quick, my question is will it damage my diode ? And does this driver seems reasonably good quality for m140 diode ? Here the ebay link High Current LM358 Laser Diode Driver (445nm Diodes, Infrared and Red Diodes) | eBay
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40ms soft-start good for 2W ?
- Thread starter Shobos
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Sigurthr
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Considering diodes can be modulated much, much faster than that I'd say it is fine. Soft start is for the driver's benefit, not really the diode (unless you have a hell of a lot of inductance in your diode leads). Edit: I didn't check to see if the driver is fine for that diode, but the soft start is fine.
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Thanks man ! The driver seems pretty decent, good soldering, proper fiberglass pcb, reverse polarity protection
rhd
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I note that they specifically say the MOSFET is rated for 2A, not the driver. You would want to see some margin. IE, a 2A driver should have a MOSFET capable of some reasonable margin more than 2A.
In other words, I wouldn't drive this board at 2A (or even 1.8A).
Further, as a linear driver, with fully charged cells, it may be dissipating as much as 6W. That's quite a bit.
IMO, we're at a stage where using linears for high current multi mode blue diodes doesn't make much sense.
In other words, I wouldn't drive this board at 2A (or even 1.8A).
Further, as a linear driver, with fully charged cells, it may be dissipating as much as 6W. That's quite a bit.
IMO, we're at a stage where using linears for high current multi mode blue diodes doesn't make much sense.