Powering Pi 4B from DC-DC buck converter
February 10, 2024, 13:20
I'm powering Pi 4B forom DC-DC (12V-5V) buck converter thruout GIPO pins. Requiement 3A is fulfild. But Pi starts once in 5-10 times. When Pi won't start, green LED binking in repeat one long - two short.
What this blinking pattern means? Any advice how to solve it?
Thanks in advance!
There is no my pattern.
Is there a message on HDMI0 ?
No signal
Connect a other Power supply and test
And try another SD card
With Type-C chager Pi starts.
Another SD card do not affect behavior.
The DC/DC converters are often using "Happy values" for the Amp. And they are prone to breaking down if used near max Amp for long durations.
So check your DC/DC converter
Checked: 5V, 3A.
And you have followed RPi foundations recommendation https://github.com/raspberrypi/hats/blob/master/designguide.md#back-powering-the-pi-via-the-gpio-header
No. Recommendation is to put diode on +5V line? Can you recomend diode model?
There is a "Ideal diode schema" on that page
Added this one. No improvement. Voltage drop on module at 3A - 80 mV. https://amzn.eu/d/7bCpV3e
I cant read russian
Sorry, changed link.
0.08 V / 3 A = 0.026 ohm and that is extremly good
Yes, but it doesn't help my problem.