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Develop ultra capacitor power supply and LiFePO4 battery power supply
Develop ultra capacitor power supply and LiFePO4 battery power supply
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Old 8th September 2018, 11:07 AM   #21
Raj1 is offline Raj1  United Kingdom
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Last edited by Raj1; 8th September 2018 at 11:12 AM.
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Old 8th September 2018, 08:17 PM   #22
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
Default Ian LiFePO4 Power supply block diagram

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.


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LifePO4PowerSupplyBlockDiagram
by Ian, on Flickr

Ian

Last edited by iancanada; 8th September 2018 at 08:30 PM.
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Old 8th September 2018, 10:51 PM   #23
sontero is offline sontero  Italy
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Quote:
Originally Posted by iancanada View Post
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.


Click the image to open in full size.
LifePO4PowerSupplyBlockDiagram
by Ian, on Flickr

Ian
Hi Ian,
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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Old 8th September 2018, 11:12 PM   #24
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
@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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Old 8th September 2018, 11:24 PM   #25
diyaudnut is offline diyaudnut  United States
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Old 8th September 2018, 11:30 PM   #26
sontero is offline sontero  Italy
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Thanks for the reply Ian. But how can we guarantee that the tension is stable.
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Old 8th September 2018, 11:38 PM   #27
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
@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
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Old 9th September 2018, 12:05 AM   #28
sontero is offline sontero  Italy
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Quote:
Originally Posted by iancanada View Post
@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
GOOD !!
Thanks Ian
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Old 9th September 2018, 06:55 AM   #29
dewdrop is offline dewdrop  Singapore
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Develop ultra capacitor power supply and LiFePO4 battery power supply
I am interested too.
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Old 10th September 2018, 07:35 AM   #30
BryceJ is offline BryceJ  Canada
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This look very interesting. I look forward to your progress.
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