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Class D Switching Power Amplifiers and Power D/A conversion

IRS2092 nois
IRS2092 nois
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Old 26th December 2017, 06:06 PM   #1
desislavov is offline desislavov  Bulgaria
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Default IRS2092 nois

Hello ,
i have amplifier with IRS2092 , but when input pot ( 20 K log ) is from 0 to around 3 ( like in the picture ) and the song is on pause i have strange noise ...
If the pot is more than 3 to MAX there is no more noise , its quietly .
This is with CD player connect and without CD player ...
I try to change the potentiometer but with new is same ...

Can you point me , please from where this problem might be ??

Regards !
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Old 26th December 2017, 06:17 PM   #2
nigelwright7557 is offline nigelwright7557  United Kingdom
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Is this an amp you built yourself or a bought in amp ?
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Old 26th December 2017, 06:30 PM   #3
desislavov is offline desislavov  Bulgaria
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i do it my myself .
This is inside :
IRS2092S 500W Mono Channel Digital Amplifier Class D HIFI Power Amp Board w/ Fan | eBay

And 650w toroid + 4x4700uF
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Old 26th December 2017, 06:32 PM   #4
nigelwright7557 is offline nigelwright7557  United Kingdom
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The irs2092 circuit is only about 3k3 input impedance.
What value pot did you use as volume control ?
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Old 26th December 2017, 06:34 PM   #5
desislavov is offline desislavov  Bulgaria
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Now is 20K , i will try with 5K ....
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