Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

RTC battery is drained #398

Open
rusefillc opened this issue Jan 18, 2025 · 3 comments
Open

RTC battery is drained #398

rusefillc opened this issue Jan 18, 2025 · 3 comments

Comments

@rusefillc
Copy link
Collaborator

rusefillc commented Jan 18, 2025 •
edited
Loading

@dron0gus says add a diode?

Image

@dron0gu says maybe remove a diode?

Image
@rusefillc
Copy link
Collaborator Author

c1a4955

@dron0gus
Copy link

dron0gus commented Jan 19, 2025 •
edited
Loading

1N4148 has too high leakage current for this application.
With U410 LDO disconnected and no D107 STM32 consumes about 1.09 uA on Vbat input.
If 1N4148 is added on LDO output - current rises up to 1.9uA.
So reverse current through 1N4148 is 0.8 uA.
This is twice bigger than defined in DS. Fake part?
Reverse current for 1N4148 is from 25nA to 50uA. OMG. We need BAV199 or BAV170 on this position.

Image

@rusefillc
Copy link
Collaborator Author

progress see https://github.com/andreika-git/hellen-one/blob/master/modules/power_12and5V/readme.md

@dron0gus keeps suggesting something else

Qwerty-OFF added a commit that referenced this issue Jan 25, 2025
@Qwerty-OFF
#398 BAS416
84b127a
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
2 participants
@dron0gus @rusefillc