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Mezzanine Power board for Raspberry Pi
Mezzanine Power board for Raspberry Pi
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Old 21st January 2018, 12:31 PM   #11
oxothuk is offline oxothuk  United Arab Emirates
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Location: Umm Al Quwain
Quote:
Originally Posted by anhton82 View Post
Thanks for your help. I want to supply power for Pi saperate as picture bellow, so is this modules is better than it?. Pin 2,4 of PI GPIO is supply 5V for DigiOne. I think module C1 (1A) is ok for it.
http://www.hdvietnam.com/attachments/basic-png.260416/http://www.hdvietnam.com/attachments/basic-png.260416/
C1+C2 to power Pi and DigiOne (top and bottom rails connected)
D to power PI 3.3V rail
E to power PI 1.8V
(need to remove PI DC/DC converter for D/E)
6VDC IN (Single, 1.5A+)
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Old 22nd January 2018, 12:35 AM   #12
anhton82 is offline anhton82  Viet Nam
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Quote:
Originally Posted by oxothuk View Post
C1+C2 to power Pi and DigiOne (top and bottom rails connected)
D to power PI 3.3V rail
E to power PI 1.8V
(need to remove PI DC/DC converter for D/E)
6VDC IN (Single, 1.5A+)
Many thanks. But I just put this board on top of Pi or I have to connect to Pi by wire?
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Old 22nd January 2018, 07:41 AM   #13
oxothuk is offline oxothuk  United Arab Emirates
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Originally Posted by anhton82 View Post
Many thanks. But I just put this board on top of Pi or I have to connect to Pi by wire?
only 1.8V need to be soldered by wire (PP9)
5V and 3.3V connected to PI by GPIO
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Old 22nd January 2018, 01:47 PM   #14
anhton82 is offline anhton82  Viet Nam
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Quote:
Originally Posted by oxothuk View Post
only 1.8V need to be soldered by wire (PP9)
5V and 3.3V connected to PI by GPIO
Sorry again, If I use B replace for C1+C2 OK, because I don't know B and C supply for which pin on GPIO! I need 2A for USB, HDD connect to Pi.
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Old 23rd January 2018, 06:21 AM   #15
oxothuk is offline oxothuk  United Arab Emirates
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Quote:
Originally Posted by anhton82 View Post
Sorry again, If I use B replace for C1+C2 OK, because I don't know B and C supply for which pin on GPIO! I need 2A for USB, HDD connect to Pi.
Module B connected to PIN 2&4 (PI Side)
Module(s) C1(1+2) connected to PIN 2&4 (HAT Side)
5V PI and 5V HAT rails can be connected together (need to solder small bridge), means either B or C can power both HAT and PI, but with modules current limitation.
If you need to have 2A - use Module B for PI power
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Old 23rd January 2018, 04:00 PM   #16
anhton82 is offline anhton82  Viet Nam
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Quote:
Originally Posted by oxothuk View Post
Module B connected to PIN 2&4 (PI Side)
Module(s) C1(1+2) connected to PIN 2&4 (HAT Side)
5V PI and 5V HAT rails can be connected together (need to solder small bridge), means either B or C can power both HAT and PI, but with modules current limitation.
If you need to have 2A - use Module B for PI power
Thank you so much. Pls give me a voucher for discount. I will order this modules.
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Old 26th January 2018, 03:44 PM   #17
anhton82 is offline anhton82  Viet Nam
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Hi Mr oxothuk, I sent email to you. Pls give me a voucher. Thanks !
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Old 30th January 2018, 07:44 AM   #18
potstip is offline potstip  Turkey
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Quote:
Originally Posted by oxothuk View Post
only 1.8V need to be soldered by wire (PP9)
5V and 3.3V connected to PI by GPIO
I have 2 doubts here;

Pre regulator is also generate RMS noise which is much higher that LT3045 so what is the point here to use Low noise regulator. Do you think LT3045 eliminate the RMS noise generated by LT3086?

Second; even you power pri from GPIO, The on board PAM2306AYPKE shunt regulator still continue to generate lots of noise. Unless you desolder it from pcb and power up pcb with shortcut cables instead of GPIO. What do you think?
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Old 30th January 2018, 08:32 AM   #19
oxothuk is offline oxothuk  United Arab Emirates
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Originally Posted by potstip View Post
I have 2 doubts here;

Pre regulator is also generate RMS noise which is much higher that LT3045 so what is the point here to use Low noise regulator. Do you think LT3045 eliminate the RMS noise generated by LT3086?
it will reduce ripples from external PSU and LT/TPS clean up remaining noise

Quote:
Originally Posted by potstip View Post
I have 2 doubts here;
Second; even you power pri from GPIO, The on board PAM2306AYPKE shunt regulator still continue to generate lots of noise. Unless you desolder it from pcb and power up pcb with shortcut cables instead of GPIO. What do you think?
i mentioned before - you need to remove DC/DC converter if want to feed pi with external 1.8/3.3V.

Please note that some DAC require 3.3V (from PI), in this case Mod D can be used to feed HAT only.
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Old 10th May 2018, 11:17 PM   #20
DanielFelix is offline DanielFelix
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Hello, I have a Raspberry Pi 3 powered via GPIO and a DAC Allo Boss powered independently, ie NO from the GPIO.
What is the correct configuration that I should use in Mezzanine Power Board?
What about the DC power supply? They specify that it must be 6vcc, I suppose it should be at least 2A. I suppose it will have a permissible range.
Can you specify or recommend exactly which model to use?
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