Looking for help
As above
I've never built or even looked at DC-DC converters, A lot of audio circuits though.
How hard will this be? Can anyone point me in the direction of circuits, Or info on theory so I can learn 🙂
As above
I've never built or even looked at DC-DC converters, A lot of audio circuits though.
How hard will this be? Can anyone point me in the direction of circuits, Or info on theory so I can learn 🙂
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A DC-DC converter will be the most efficient way to convert.
That's quite a hefty current so care will need to be taken.
That's quite a hefty current so care will need to be taken.
25A !!!! there are a number of commercial products [google is your friend].
Several of the major IC companies make dc-to-dc boost chips - several have 'interactive' design guides on their website
It is not hard for low current [say <2A] boosters - both using discrete and IC approaches [again, google is your friend!]
Thanks chaps I'll look into the manufactures sites. Didn't think they'd be as helpful as that. I should have checked 🙂
I'll keep you uptodate with my plans
I'll keep you uptodate with my plans
A linear regulator at 25A !!!! Most regs need a drop-out of about 3V - that would be 75 x 2 = 150W of heat.
I was thinking that a 45V circuit would probably tolerate 48V.
It probably doesn't need to be stabilised anyway.
I was thinking that a 45V circuit would probably tolerate 48V.
It probably doesn't need to be stabilised anyway.
I would answer with 3 words
Difficult
Expensive
Dangerous
uhhh.... the acronym is purely coincidental
Difficult
Expensive
Dangerous
uhhh.... the acronym is purely coincidental
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Why getting +/-45V (or whatever) out of a 12/15V supply?
Why double efforts?
Why not straight from a 120/240 VAC wall outlet?
Why double efforts?
Why not straight from a 120/240 VAC wall outlet?
AH No ones figured it out yet?
Want to build multi channel amp for the car. fedup of cheap car amps and thought about running some Quad 405 channels or build my own. I guess I could use one dc-dc per channel. I ultimatly want to use 15 channels of amplification. but would start with 4 then to 6 then to 12 and possibly upto 15. so thought one or two large supplies would be better but sounds as though it might be easier to make them full monoblocks with PSU for each.
Want to build multi channel amp for the car. fedup of cheap car amps and thought about running some Quad 405 channels or build my own. I guess I could use one dc-dc per channel. I ultimatly want to use 15 channels of amplification. but would start with 4 then to 6 then to 12 and possibly upto 15. so thought one or two large supplies would be better but sounds as though it might be easier to make them full monoblocks with PSU for each.
Nice to know .... in the 14th post !!! 😡
And the 12/15V 25A spec *hints* at some kind of surplus PSU trying to find a job.
Simply stating "Car Battery" would have been much clearer from the beginning 😉
And the 12/15V 25A spec *hints* at some kind of surplus PSU trying to find a job.
Simply stating "Car Battery" would have been much clearer from the beginning 😉
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Sorry Chaps consider wrists Slapped
TBH Didn't think it really matters what the device is at the end of the supply. I've always treated psu and device as 2 things so appologies if its made things difficult. I guess its quite a differant thing having a sustained load vs a dynamic. However I would really like to have something that will cope. I'm just fedup of colapsing voltage rails due to under specification. On the flip side Having not worked with switchmode before a heavily dynamic load could casue simmilar issues?
Not really up for class D on the amp stage. I dont know maybe but I have been running a 405 in the boot with an inverter to mains and been very happy so thats making me want to go along the lines of build proper psu and go from there.
TBH Didn't think it really matters what the device is at the end of the supply. I've always treated psu and device as 2 things so appologies if its made things difficult. I guess its quite a differant thing having a sustained load vs a dynamic. However I would really like to have something that will cope. I'm just fedup of colapsing voltage rails due to under specification. On the flip side Having not worked with switchmode before a heavily dynamic load could casue simmilar issues?
Not really up for class D on the amp stage. I dont know maybe but I have been running a 405 in the boot with an inverter to mains and been very happy so thats making me want to go along the lines of build proper psu and go from there.
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Is the output +/- 45V supposed to be minimum, maximum or absolutely constant?
If not absolutely constant, how much can it vary?
If not absolutely constant, how much can it vary?
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