Custom board with MDBT50Q-1MV2

RE: Custom board with MDBT50Q-1MV2

mathiaso — Fri, 19 Apr 2024 14:30:05 GMT

Yes, that is true. External circuitry can then be powered through VDD.

RE: Custom board with MDBT50Q-1MV2

Nguyen Hoan Hoang — Fri, 19 Apr 2024 14:02:45 GMT

You can power directly through VDDH. The nRF52840 has internal regulator that you can set the operating voltage you want. Powered this way the VDD_nRF will be output based on the settings. Current will be limited so you cannot put to much load on it.

RE: Custom board with MDBT50Q-1MV2

mathiaso — Fri, 19 Apr 2024 13:52:39 GMT

An option could be to use a PMIC.

RE: Custom board with MDBT50Q-1MV2

Tuhy — Fri, 19 Apr 2024 12:59:02 GMT

Is there any way that i could have a stable 3V3 voltage from LiPo battery ?

RE: Custom board with MDBT50Q-1MV2

mathiaso — Fri, 19 Apr 2024 08:13:22 GMT

In theory, it should work. However, it isn't an optimal solution.

The LiPo battery will have a varying voltage as it depletes. I assume it will have a voltage of approx. 4.2V when fully charged to approx. 2.8V when fully discharged. Regarding VDDH on the nRF52840, the Recommended operating conditions state that it has a min. voltage of 2.5V and a max. voltage of 5.5V. Hence, the entire span of 2.8V - 4.2V will be within the spec for VDDH.

Remember that there may be variations from battery to battery, so it is recommended to do sufficient testing to confirm that it works as expected when close to especially the lower limitation. The voltage of the battery may drop additionally under higher current loads.

Best regards,
Mathias

RE: Custom board with MDBT50Q-1MV2

Tuhy — Thu, 18 Apr 2024 09:45:50 GMT

yes i am

RE: Custom board with MDBT50Q-1MV2

mathiaso — Tue, 02 Apr 2024 14:44:02 GMT

Hi.

I'm sorry for the delayed response due to the Easter holidays we've just returned from here in Norway.

So am I understanding you right if you don't want to use a regulator or anything else than a battery for your power supply?

Best regards,
Mathias