China Driver - strange current measure

[equal]

Hi,

i have bought this driver (3A TTL Laser Driver Board Step Down Driver Module 405nm 445nm 450nm | eBay)

I tried to adjust the values, but with a testload (4*1N4001 + 1Ohm 5W ~> M140 LD) i got this.

look the attachements

the measured current has a peak over the adjusted value.

at lpf3.jpg u can see the differenz between measurement methods. Above is simple the voltage over the diode, below measurement is the ld current.

who knows about this driver ?

greetings

 

[Cyparagon]

Yeah, that's garbage. They've got no business calling that a laser driver. I'd get a refund if I were you.

 

[HydroSean]

I concur, however you may want to test it out at the advertised 3 Amps instead of the 0.8 Amps and see if it still has the spike. Maybe its only meant to be ran at exactly 3.0 Amps

 

[equal]

thanks for answers ...

i need this driver with 0,5A LD current ...
but adjusted 1.2A will show a peek 1.9A ...


that's garbage ... ok

 

[94Z28]

2pcs adjustable current laser diode driver 80-500mA w/TTL, AixiZ

I use BlackBuck for higher amperages, but the only one i've tried at .5A is the Aixiz

 

[DTR]

I have had many people say they have lost multiple diodes on that driver. I think they just keep recycling LED drivers calling them laser drivers as they are in mass production and very cheap.

 

[equal]

@DTR: the AixiZ or my china driver ?

 

[DTR]

The china one. This. Or vairants of this like the one you linked to.

 

[equal]

ok .. thanks

last question: the AixiZ driver .. is this the same like this 635nm 650nm 808nm 980nm TTL Laser Diode Driver Board Drive 5V Supply 50 300mA | eBay ?