Develop ultra capacitor power supply and LiFePO4 battery power supply

[Raj1]

Count me in.

[iancanada]

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

[sontero]

Originally Posted by iancanada

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

Hi Ian,
Is not a regulator provided before the chipdac?It is prudent not to foresee it

[iancanada]

@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

[diyaudnut]

subscribed.

[sontero]

Thanks for the reply Ian. But how can we guarantee that the tension is stable.

[iancanada]

@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

[sontero]

Originally Posted by iancanada

@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

[dewdrop]

I am interested too.

[BryceJ]

This look very interesting. I look forward to your progress.