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#21 |
diyAudio Member
Join Date: Jan 2003
Location: UK
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Last edited by Raj1; 8th September 2018 at 11:12 AM. |
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#22 |
diyAudio Member
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Ian LiFePO4 Power supply principle block diagram
Voltage rails: 1, Low noise linear regulated 5V 2A: for digital sections (before isolator is suggested); 2, Pure LifePO4 battery power 3.3V: for clock board; 3, Pure LifePO4 battery power 3.3V: for DAC; 4, Pure LifePO4 battery power 3.3V or 6.6V or 9.9V or 13.2V: for I/V stages or analog sections; 5, Pure LifePO4 battery power 3.3V or 6.6V or 9.9V or 13.2V: for I/V stages or analog sections; All voltage rails are independent from each other. All battery powered rails are isolated from DC input Multiple LifePO4 boards can be bridged together for more power rails. Normal laptop power adapter would be good option as DC input. ![]() LifePO4PowerSupplyBlockDiagram by Ian, on Flickr Ian
__________________
gitHub: https://github.com/iancanada/DocumentDownload GB2020Q3: https://www.diyaudio.com/forums/grou...ml#post6413248 YouTube Channel: https://www.youtube.com/channel/UC75...iy-PHSJB-8PgPg Last edited by iancanada; 8th September 2018 at 08:30 PM. |
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#23 | |
diyAudio Member
Join Date: Sep 2010
Location: Cagliari - Sardinia
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Quote:
Is not a regulator provided before the chipdac?It is prudent not to foresee it Last edited by sontero; 8th September 2018 at 10:55 PM. |
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#24 |
diyAudio Member
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@sontero
The whole idea is to use LifePO4 battery directly in order to get rid of any LDO/regulator after it. There is no problem if you DAC runs at 3.3V but with LDO which has 5V input. LDO will be bypassed automatically if the input is lower than the dropout voltage. In this case, you can still feed the 3.3V LifePO4 power into it. However If your DAC chip runs at 5V originally, you have to use ultra capacitor power supply which will have pure 5V output. Regards, Ian
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gitHub: https://github.com/iancanada/DocumentDownload GB2020Q3: https://www.diyaudio.com/forums/grou...ml#post6413248 YouTube Channel: https://www.youtube.com/channel/UC75...iy-PHSJB-8PgPg |
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#25 |
diyAudio Member
Join Date: Feb 2015
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subscribed.
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#26 |
diyAudio Member
Join Date: Sep 2010
Location: Cagliari - Sardinia
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Thanks for the reply Ian. But how can we guarantee that the tension is stable.
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#27 |
diyAudio Member
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@sontero
I did a lot of test on my ES9018/28/38 DAC HAT with feeding 3.3V directly, I'm very happy with the LifePO4 battery cells. ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi Regards, Ian
__________________
gitHub: https://github.com/iancanada/DocumentDownload GB2020Q3: https://www.diyaudio.com/forums/grou...ml#post6413248 YouTube Channel: https://www.youtube.com/channel/UC75...iy-PHSJB-8PgPg |
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#28 | |
diyAudio Member
Join Date: Sep 2010
Location: Cagliari - Sardinia
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Quote:
![]() Thanks Ian |
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#29 |
diyAudio Member
Join Date: Mar 2004
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I am interested too.
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#30 |
diyAudio Member
Join Date: Jul 2013
Location: Vancouver, BC
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This look very interesting. I look forward to your progress.
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