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Chip Amps Amplifiers based on integrated circuits

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Old 28th September 2003, 08:43 AM   #11
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I would dare to say that probably your PSU is not working well...try it without he switchmode PSU...use a "standard" PSU to power it up and test...before you proceed to the SMPSU...
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Old 28th September 2003, 08:52 AM   #12
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How? I don't own a 220v=>40-0-40 transformer and i don't think that i can find a commercial one...
Anyway i've tested the PSU and a it produce 2.2A from 1.4A as input. Infact i use a 220=>+14V@1.5A to feed the SMPS(my old Creative supply ).
So u think my problem is the SMPS????
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Old 28th September 2003, 08:56 AM   #13
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You really should heatsink the Darlingtons...and try another PSU...seems to be the SMPSU...under a volt...under load is not a good thing...
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Old 28th September 2003, 09:00 AM   #14
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Quote:
You really should heatsink the Darlingtons
Absolutely but for the moment that was only for a test...

Quote:
under load is not a good thing
BUt this should be mean that thecircuit take all the curren/voltage or not?
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Old 28th September 2003, 09:19 AM   #15
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Even if they take all the current..the voltage should not "drop" meaning the SMPSU might not be giving enough power to the amp...OR the amp is having a really heavy short which is causing such a BIG current draw...but since you told me it's less than 1 amp current drawn...I'm not really sure the figures tally...so might be your SMPSU...
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Old 28th September 2003, 10:19 AM   #16
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I don't understand so clearly.. u say that the voltage is too low for th amp... my SMPS don't produce enough current?
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Old 28th September 2003, 10:49 AM   #17
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Yup...your SMPSU is not having enough current...but the voltage is probably enough...only because the amp draws a big current does the voltage dip...
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Old 28th September 2003, 11:17 AM   #18
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So my problem maybe only the current...
I've made a check...
At the input of primary 9A.. output of each secondary...0.5A!!! AAAAAAAAAAAHHHHHHHHHHH!!!!
What maybe? Wrong frequency? Wrong winding of transformer?
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Old 28th September 2003, 11:26 AM   #19
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I'm not so sure..I dun really work with SMPSU...so I can't give you many tips...
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Old 28th September 2003, 12:39 PM   #20
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COuld u explain this to me?
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