I am part of a team putting together a large art installation. This involves 50 x 5W LEDs, some motors, and other stuff.
Our requirements are high current 12V (about 25 amps with everything going.)
For simplicity and "plug and play" we decided to use a high quality, reliable ATX computer SMPS.
Budget: £200 or less. UK price.
Primary requirements: Support little or no load on 5V/3.3V. (About 10 watts maximum.) All the load on the 12V rail. Additional light load on the 5VSB rail. Ripple - not critical, we're running LEDs from it. Can tolerate sudden load shifts (from zero to 21A load in 50ms) - up to 1V transients acceptable but cannot shutdown/restart.
Other requirements: All secondary to be high quality caps (unless there's a very good reason not to... enlighten me),
The PSU will run between 50% and 100% of a 250W load for 50 days, 24/7. After that, it will be moved to a museum, but I'm told it will only be occasionally powered up, so lifespan then is no longer an issue.
Modularity is a nice feature, but is not critical, as we have a lot of space.
Ambient temperature will be about 40°C inside a ventilated, air cooled electronics bay.
I've done a little research and narrowed it down to two main candidates:
- Seasonic SSR 550RM about £120; group regulated, but from JonnyGuru test, has good cross loading performance, all Nippon Chemicon output caps.
- Corsair Vanguard V700W about £110; VRM regulated, cross loading naturally OK. However 12V does sag a bit under max load which may create issues.
Anyone have any criticisms of these, or possible alternatives?
Our requirements are high current 12V (about 25 amps with everything going.)
For simplicity and "plug and play" we decided to use a high quality, reliable ATX computer SMPS.
Budget: £200 or less. UK price.
Primary requirements: Support little or no load on 5V/3.3V. (About 10 watts maximum.) All the load on the 12V rail. Additional light load on the 5VSB rail. Ripple - not critical, we're running LEDs from it. Can tolerate sudden load shifts (from zero to 21A load in 50ms) - up to 1V transients acceptable but cannot shutdown/restart.
Other requirements: All secondary to be high quality caps (unless there's a very good reason not to... enlighten me),
The PSU will run between 50% and 100% of a 250W load for 50 days, 24/7. After that, it will be moved to a museum, but I'm told it will only be occasionally powered up, so lifespan then is no longer an issue.
Modularity is a nice feature, but is not critical, as we have a lot of space.
Ambient temperature will be about 40°C inside a ventilated, air cooled electronics bay.
I've done a little research and narrowed it down to two main candidates:
- Seasonic SSR 550RM about £120; group regulated, but from JonnyGuru test, has good cross loading performance, all Nippon Chemicon output caps.
- Corsair Vanguard V700W about £110; VRM regulated, cross loading naturally OK. However 12V does sag a bit under max load which may create issues.
Anyone have any criticisms of these, or possible alternatives?
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