blrock
0
- Joined
- Apr 29, 2009
- Messages
- 251
- Points
- 18
I decide to sacrifice one of my A140 diodes. I needed to know if they cope when under continuous operation for an extended period at highish amps. I read many threads of guys keeping the duty cycle short, then letting it cool down before powering on again.
The setup was simple. One diode glued into the heatsink and a fan keeping the driver and heatsink cool.
I powered on Thurday 16h30, current set to 1.3A. Time now is Saturday 16h30. 48 hours later.
Conclusion: Heatsink is still ice cold. I can touch within mm of the diode and everything is still cool. Absolute no signs of degradation. I was originally going to add a peltier cooler to the heatsink but I think this would have been an overkill.
BTW, it is winter in Johannesburg so the ambient temperature is between 6-23 degrees celsius. I'm sure the heatsink would have been a little warm if the ambient was higher.
Although I don't intentionally want to kill this diode I did volunteer it for sacrifice. I still have 23 more
Any ideas how I should push it? I don't have a laser power meter but I thought maybe going 2 amps or so for another continuous 48 hours ????
The setup was simple. One diode glued into the heatsink and a fan keeping the driver and heatsink cool.
I powered on Thurday 16h30, current set to 1.3A. Time now is Saturday 16h30. 48 hours later.
Conclusion: Heatsink is still ice cold. I can touch within mm of the diode and everything is still cool. Absolute no signs of degradation. I was originally going to add a peltier cooler to the heatsink but I think this would have been an overkill.
BTW, it is winter in Johannesburg so the ambient temperature is between 6-23 degrees celsius. I'm sure the heatsink would have been a little warm if the ambient was higher.
Although I don't intentionally want to kill this diode I did volunteer it for sacrifice. I still have 23 more
Any ideas how I should push it? I don't have a laser power meter but I thought maybe going 2 amps or so for another continuous 48 hours ????