Hi dear, i am finishing my BZLS and i need some help. I am using
2 psus. The psus heatsinks get too hot, do i need to increase
the heatsinks even using 2 psus, one for each chanel ?
Link
http://diyaudio.fotos.net.br/
sonny246
Best regards
hcbonfim
2 psus. The psus heatsinks get too hot, do i need to increase
the heatsinks even using 2 psus, one for each chanel ?
Link
http://diyaudio.fotos.net.br/
sonny246
Best regards
hcbonfim
Are you using IRF610?
Its max junction temperature rating is about 150 deg C. So, in my case, I use them with max in-service heat sink temperature at about 70 deg C which might mean the junction temperature at about 75 deg C. Assuming my temperatures are acceptable, if I compare my sink sizes to yours, mine have wider surface areas.
For you to get better replies, I think you need to measure your sink temperature and post it.
Its max junction temperature rating is about 150 deg C. So, in my case, I use them with max in-service heat sink temperature at about 70 deg C which might mean the junction temperature at about 75 deg C. Assuming my temperatures are acceptable, if I compare my sink sizes to yours, mine have wider surface areas.
For you to get better replies, I think you need to measure your sink temperature and post it.
hey hcbofim,
my bzls rails are +/- 50vdc, it has been running for two years now with no problems. I got the psu sinks from digikey, maybe you can stand up your fets like this and use larger sinks.
http://www.passdiy.com/images/zen gallery/soz-p11-f4.jpg
coils
my bzls rails are +/- 50vdc, it has been running for two years now with no problems. I got the psu sinks from digikey, maybe you can stand up your fets like this and use larger sinks.
http://www.passdiy.com/images/zen gallery/soz-p11-f4.jpg
coils
hello
http://domainedupossible.free.fr/pagemus/BOSOZ/bosoz1.htm
a bosoz, that heats!
look at the photographs in bottom of the page
if I change case, I will assemble the irf610 (power supply) on the frame
Phill
http://domainedupossible.free.fr/pagemus/BOSOZ/bosoz1.htm
a bosoz, that heats!
look at the photographs in bottom of the page
if I change case, I will assemble the irf610 (power supply) on the frame
Phill
Hoping this info useful . . .
I often use the used piece of aluminium plate as a heat sink.
The example is shown in the picture.
Four IRF610 dissipate heat about total 5.5W.
I have sink temperature at maximum 65 deg C.
I assume the temp rise is about 40 deg C above room temp.
So the sink has thermal resistance of about 7.5 deg C/W.
I often use the used piece of aluminium plate as a heat sink.
The example is shown in the picture.
Four IRF610 dissipate heat about total 5.5W.
I have sink temperature at maximum 65 deg C.
I assume the temp rise is about 40 deg C above room temp.
So the sink has thermal resistance of about 7.5 deg C/W.
Attachments
It's a chocolete selector.
Size is somewhat big as a result that I just wanted to use the wood box wandering around. The front side is made of copper-clad Epoxy board while the back side is of Phenol board. To reinforce the strength in thickness direction, I doubled Phenol boards with glue. On innner side of the back panel, the copper-clad is used as a ground plane.
Size is somewhat big as a result that I just wanted to use the wood box wandering around. The front side is made of copper-clad Epoxy board while the back side is of Phenol board. To reinforce the strength in thickness direction, I doubled Phenol boards with glue. On innner side of the back panel, the copper-clad is used as a ground plane.
Attachments
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.