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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 6th December 2018, 02:10 AM   #311
ofswitched is offline ofswitched  Taiwan
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Quote:
Originally Posted by iancanada View Post
For McDual XO you can do it so to reduce power supply internal resistance even more. But for McFifo, you don't need to.

Regards,
Ian

My mistake, I think of McFIFO as McDual XO.

If I am not mistaken, McFIFO should not need to be powered by batteries, use a general linear power supply?

Last edited by ofswitched; 6th December 2018 at 02:14 AM.
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Old 6th December 2018, 02:37 AM   #312
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
Quote:
Originally Posted by ofswitched View Post
My mistake, I think of McFIFO as McDual XO.

If I am not mistaken, McFIFO should not need to be powered by batteries, use a general linear power supply?
Yes, you are right. It's not really necessary for anything before isolator to use battery power.

Ian
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Old 6th December 2018, 06:43 AM   #313
acg is offline acg  Australia
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Ian,

How is the power supply turned on and off? Is it the tactile switch/encoder next to the led screen? Can a normal SPST remote switch also be used?

Anthony
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Old 6th December 2018, 01:05 PM   #314
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
@acg

There are 3 ways to turn on/off the LifePO4 power supply.

1. Press and hold the knob encoder on the OLED panel.

2. Form a external control button which is connected to the on/off PIN on the PCB.

3. By the on/off signal (3,3V-12V DC level, input is isolated) from external master power supply or controller through the bridge cable socket. This feature makes it possible that more LifePO4 power supplies can be bridged together to have more voltage rails or higher voltage.

Regards,
Ian
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Old 6th December 2018, 06:10 PM   #315
Tesla Audio is offline Tesla Audio  Croatia
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Hi Ian
Is any LiFePO4PowerSupply_1 board available?
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Old 7th December 2018, 12:56 AM   #316
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
@Tesla Audio

They will be available in a couple of weeks.

Thank you for interest.

Regards,
Ian
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Old 7th December 2018, 01:00 AM   #317
ofswitched is offline ofswitched  Taiwan
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Quote:
Originally Posted by iancanada View Post
@acg

There are 3 ways to turn on/off the LifePO4 power supply.

1. Press and hold the knob encoder on the OLED panel.

2. Form a external control button which is connected to the on/off PIN on the PCB.

3. By the on/off signal (3,3V-12V DC level, input is isolated) from external master power supply or controller through the bridge cable socket. This feature makes it possible that more LifePO4 power supplies can be bridged together to have more voltage rails or higher voltage.

Regards,
Ian
Why not buy an RF module for an option? The RF module in this photo is only for $2. Taobao can bought a remote control module that supports Android phones.

TB25bwDoFXXXXcWXpXXXXXXXXXX_!!2836682183.jpg

21530202839825_195.jpg

Last edited by ofswitched; 7th December 2018 at 01:02 AM.
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Old 7th December 2018, 06:39 AM   #318
Tesla Audio is offline Tesla Audio  Croatia
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Ian do you know approximately price for pcb and cost for all electronic elements?
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Old 7th December 2018, 09:50 AM   #319
koldby is offline koldby  Denmark
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Hi.

I would like to use LifePO4 battery supply for my TDA1541A DAC but the data sheet for TDA1541A says Max +/- 5,5V and - 16V with absolute max @ +/- 7V and -17V. LiFePO4 can supply +/- 6,6V and -16,5 V.
A little too close to the absolute max.
Has anyone tried this?
Would it degrade the direct battery power quality if i place a silicon diode in series with each of the three supply lines? That would lower the voltages to +/- 6V and -15,9V...
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Old 7th December 2018, 10:15 AM   #320
Blitz is offline Blitz  Germany
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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

Let me see if I get it right for my battery order:

- Each board has four battery rails.
- So if each of them would have 3.3V, this means four batteries to buy...right ? Or did you configured the board so that you could use all the slots for batteries in any case, resulting in a higher capacity by paralleling batteries ?

If I want 26V: Possible with two battery rails in series (...for the CCS of my LTP-Tube stage) ?

Best Regards

Frank
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