Power Supply for nRF52840?

[skydiver]

Hello,

I would like to use the nRF52840 for a wearable. It should be powered by a lipo-battery with 3.7V. Therefore I would solder it to the VDDH and Ground Pin (VSS). Is that right? I am new to electronic engineering. 

Furthermore I would like to make IT rechargeable. I am thinking about using the Adafruit Lipo Charger. Can I simply solder it to the board? Which are the pins for such a component or what do you recommend to create a rechargeable Board?

Kind regards

[Kaja]

Hi,

so with a 3.7V battery, means that you have to operating in high voltage mode, meaning: 
High voltage mode is entered when the supply voltage is only connected to the VDDH pin and the VDD pin is not connected to any voltage supply. For the supply voltage range to connect to VDDH pin see parameter VDDH.  

I am thinking about using the Adafruit Lipo Charger. Can I simply solder it to the board

 - Yes, I believe so. 

Best regards,
Kaja

[skydiver]

Can you tell me to which pins it should be soldered? 

E.g. this charger: www.exp-tech.de/.../lipoly-charger

[Kaja]

Do you have a datasheet? 

Based on the pictures, it seems that if you want to solder it to the pcb, it should be enough to solder the ground crones. 

Best regards,
Kaja

[skydiver]

I thought about soldering it directly to the bluetooth module without an extra pcb. The schematics for it are below:

The datasheet: https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.1.pdf

I thought about using the cable which is included. It has a red and a black wire (as seen in the image).

Best regards

[Kaja]

Hi Timo, 

sorry for the delayed response, because of vacation time, we are low on staff, but I will get back to you early this week. 

Best regards,
Kaja