Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

TPA3116 + CSR8635 Idle Noise
TPA3116 + CSR8635 Idle Noise
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st August 2017, 09:59 AM   #1
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
Unhappy TPA3116 + CSR8635 Idle Noise

Hello I've recently bought on Aliexpress class D amp TPA3116 + CSR8635. What is important to me it has potentiometer and 50W per channel. Nice feature is connecting DC with screws.

Annyway, I have an issue with noise, when bluetooth device is not connected. probably noise also exists when music is playing. But when music is being switched off - noise is very laud. Off course I could turn the potentiometer down - but it is not a acceptable solution here I used 24V 4.2A DC as power source. tested with one speaker connected.

I'm attaching photo of the board. Maybe someone will help me to solve noise issue ?
Click the image to open in full size.
An externally hosted image should be here but it is no longer accessible. Please upload images instead of linking to them to prevent this.
  Reply With Quote
Old 1st August 2017, 01:31 PM   #2
doctormord is offline doctormord  Germany
diyAudio Member
 
doctormord's Avatar
 
Join Date: Oct 2007
Is th4 noise still present when connecting a cable to the line-in?
  Reply With Quote
Old 1st August 2017, 04:39 PM   #3
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
Yes, I connected portable mp3 player via jack - nothing has changed.
  Reply With Quote
Old 1st August 2017, 04:43 PM   #4
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
Quote:
Originally Posted by doctormord View Post
Is th4 noise still present when connecting a cable to the line-in?
Yes I've connected portable mp3 player via mini jack - nothing has changed.

Also when I connected short piece (without soldering) of wire to bluetooth antena - nothing changed as well
  Reply With Quote
Old 2nd August 2017, 08:30 PM   #5
doctormord is offline doctormord  Germany
diyAudio Member
 
doctormord's Avatar
 
Join Date: Oct 2007
Can you try powering the board by batteries?
  Reply With Quote
Old 2nd August 2017, 08:39 PM   #6
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
12V or 24V from batteries ? I'll try with batteries as power supply.
  Reply With Quote
Old 2nd August 2017, 11:53 PM   #7
doctormord is offline doctormord  Germany
diyAudio Member
 
doctormord's Avatar
 
Join Date: Oct 2007
12V is fine.
  Reply With Quote
Old 19th September 2017, 07:57 AM   #8
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
Hello, I tested this module with 12V battery as power source. Noise is still present just from the beginning. I've also tested different power sources - laptop's dc adapters - same result. The noise will be louder if I change gain with potentiometer.
There is any chance to fix this issue ?
  Reply With Quote
Old 19th September 2017, 01:06 PM   #9
theAnonymous1 is offline theAnonymous1  United States
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
Quote:
Originally Posted by baklazanowy View Post
Hello, I tested this module with 12V battery as power source. Noise is still present just from the beginning. I've also tested different power sources - laptop's dc adapters - same result. The noise will be louder if I change gain with potentiometer.
There is any chance to fix this issue ?
Does the pot have writing on the back? Like "B50K" or similar?
  Reply With Quote
Old 19th September 2017, 01:08 PM   #10
baklazanowy is offline baklazanowy
diyAudio Member
 
Join Date: Jul 2017
Quote:
Originally Posted by theAnonymous1 View Post
Does the pot have writing on the back? Like "B50K" or similar?
I have to de-solder it and check.
  Reply With Quote

Reply


TPA3116 + CSR8635 Idle NoiseHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SANWU TPA3116 + CSR8635 Bluetooth 4.0 - Noise Fix doctormord Class D 218 23rd September 2018 11:22 PM
Picking up too much digital noise with TPA3116 twomix Class D 30 6th June 2017 02:42 PM
TPA3116 2.1 + Little Bear P5 + noise Swiftmatt Class D 6 28th September 2015 07:54 AM
TPA3116 2.1 digital amplifier POP noise on/off mk4r34 Class D 0 13th March 2015 06:58 PM
How to fix idle noise on 50 year old Bang and Olufsen Alaza Solid State 11 10th July 2013 08:38 PM


New To Site? Need Help?

All times are GMT. The time now is 07:35 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki