P.S. I remind you that the CCS running current is what voltage drop you measure across Rset divided by Rset in Ohm. Power dissipation on output sink will be CCS current minus max real load operating current times output voltage. CCS MOSFET sink will receive in Watt the DC across the large smoothing capacitor minus reg's output voltage times the CCS current.
I have now added a SSLV1.1 to emulate 79/78L05 in the DAM :
http://www.diyaudio.com/forums/vend...magnitude-24-bit-384-khz-285.html#post4353563
http://www.diyaudio.com/forums/vend...magnitude-24-bit-384-khz-285.html#post4353563
You would also have to check out C101 C201 electrolytic instead of C102 C202 MKT I guess? Since its for digital. As you did with the DCB1 supply for DAM. C103-C203 option even. In a separate session. To decide best config in your application. Its all described in the SSLV manual. Section 4. Output Zobel/Ecap
Ok I got my positive reg working my target voltage out is 24v@ .24a
I am getting 3.2 volts across R101 which is 10 ohm .32mA of current.
I have 8.6 volts across R103 which is 1.8k I have a 100 ohm dummy load.
The dummy load seems to get pretty warm after its been on for a few minutes
Dose this seem right or did I do something wrong?
Regards
Dave
I am getting 3.2 volts across R101 which is 10 ohm .32mA of current.
I have 8.6 volts across R103 which is 1.8k I have a 100 ohm dummy load.
The dummy load seems to get pretty warm after its been on for a few minutes
Dose this seem right or did I do something wrong?
Regards
Dave
I am getting 24v across the dummy load with good adjustable range from the 5K trimmer
24V across 100 Ohm means 240mA resistively simulated load at 5.76W dissipation.
You set 320mA current limit. So you both have enough spare and a hot dummy load. It computes.
So I am trying to make everything compute in my head. So everything is ok
I have current to spare
Chatziva, very nice build! Can you please tell me which heatsinks you used on the SSLV1.1?
Thanks Salas. Indeed it's a bit early to tell, but so far so good, I like what I am hearing a lot!!
These:
SK 145/37,5 STS-220 - FISCHER ELEKTRONIK - HEAT SINK, TO-220, ETC, 12°C/W | Farnell element14
They can get warm but for low current applications like this DAC they're fine.
Note I had to mount them upside down (i.e. with the legs facing up) which is a little bit annoying but couldn't find anything better at 12C/W. It would have been nice if there was a single heatsink for both mosfets but couldn't find anything suitable.
The trafo on the left had a bit of a surgery. It started life as a 15v+15v but I unwound one secondary until roughly 9v for the reflektor-d
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