DPS-600 fast regulated smps for Wire-Amp - Page 15 - diyAudio
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Old 28th November 2012, 08:34 PM   #141
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Originally Posted by BuildMeSomething View Post
It's ok, I know which one needs to be mounted. Going to do the work on Saturday when I have plenty of time

Hoping to get a chassis very early in the new year, something with huge heatsinks so I can use it to heat my spare room
Could you please let me know where did you get the 18NB40 Mosfets?
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Old 29th November 2012, 09:46 PM   #142
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AP2 was very generous and supplied my with a couple of bits needed to get my two dps-600s running once more.
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Old 6th December 2012, 10:08 PM   #143
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Red face Breakage

Ok, got one of the dps-600s back up and running [one with blown 1R fuses]. On the second unit I made another boo-boo...

I removed the heatsink to enable easier removal / fitting of the mosfet... this bit is complete and heatsink back in place but, while fitting the heatsink clamps I cought the Film Capacitor C5 breaking it off...

AP2, can you please let me know the part code / name / values etc for C5...

I need to order the parts for the bias circuit and can order this at the same time.

regards

Paul
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Old 6th December 2012, 10:37 PM   #144
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Originally Posted by BuildMeSomething View Post
Ok, got one of the dps-600s back up and running [one with blown 1R fuses]. On the second unit I made another boo-boo...

I removed the heatsink to enable easier removal / fitting of the mosfet... this bit is complete and heatsink back in place but, while fitting the heatsink clamps I cought the Film Capacitor C5 breaking it off...

AP2, can you please let me know the part code / name / values etc for C5...

I need to order the parts for the bias circuit and can order this at the same time.

regards

Paul
Eh? i hope you not have destroyed lm317/337 area...ahahah!
C5 is 100nF400V poliest "Arcotronics" but is not critical.
please, ceck well iso on both regulators "LM".
This mosfet, not require heatsink removed normally.

regards
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Old 7th December 2012, 11:54 AM   #145
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LOL... no, nothing else has been destroyed, I physically broke C5 so 'LM' regs will be ok

Paul
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Old 1st January 2013, 08:49 AM   #146
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What is everyone else using between alu heat bar on the DPS600 and the alu heatsink/heat spreader sheet that Roberto has recommended? I think it's got to be some conductive thermal paste, right? To isolate it would leave an isolated lump of aluminium electrically floating inside the chassis?

Any other opinions on whether the thermal interface between the two should be isolating or conductive in this application?

I'm using an individual bar for each of my DPS600 because it suits my layout better. I've got some 3mm thick 50mm wide bar for each DPS600.
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Old 14th March 2013, 11:20 PM   #147
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Hmmm... I was thinking of getting a sheet of Keratherm Red for between the dps-600's heatsink and heat spread/base plate. The base plate would still be grounded via the securing screws into the heatsink.

@ hochopeper... how's the bias & protection setup going? Much progress?
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Old 15th March 2013, 12:57 AM   #148
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I don't think there would be much value in using keratherm for this, the heat load isn't high enough.


The bias/protection thing got put on hold a bit ... I'm going to build and test one amp+dps600 over the Easter break then go back to it. I have a schematic that would do it all with discrete ICs include 555 timers, flipflops, schmitt triggered buffers etc but getting a pcb layout that I was happy with and the cost including an extra power supply was never really lining up with what I had in mind. The number of ICs to connect together just was not neat on a 2 layer board at least it wasn't a layout I was able to get right since I have only very limited layout experience. I am now thinking of doing what qusp suggested fairly early on, use a microprocessor (arduino or similar) instead of all of the ICs. I have a few projects now to write Arduino stuff for so I might end up rolling my own Arduino pcb that is tailored to these 2 or 3 applications, more on those 'other applications' in the coming weeks/months

Last edited by hochopeper; 15th March 2013 at 01:05 AM.
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Old 22nd March 2013, 03:45 PM   #149
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Roberto,

Do you have a recommended fuse size per DPS600? What if two DPS600 are powered from the same fuse?


Cheers,
Chris

Last edited by hochopeper; 22nd March 2013 at 03:49 PM.
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Old 26th March 2013, 12:16 PM   #150
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Finally got the last bit for the not-working DPS-600 [100nF 400V - C5] and put in place...

Unfortunately no joy, the unit is still not working. On power up both green led's blink at roughly a 1 sec cycle on-off etc...

Only replaced one Mosfet first time, going to have a last go and replace all this time...

Paul
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