NRF518222 using 3V coin cell battery

[Lee]

I have a question about the NRF518222, we using 3v coin cell battery as power for Ldo working mode. The connection between the devices and mobile phones, regular, disconnection and reconnection. How to resolve this problem?

[Lee]

Dave_couling : I have using the NRF518222 in LDO power mode. Not in 1.8V power mode. When using the new coin cell , the volatge has obvious drop(0.15V)。 The connection will be disconnect about 30mintues. I am very confused by it ,and the ble 4.0 have this problem?

RK:

Thanks for you reply. the board is designed by us , we reference the Ldo mode. The crystals is epson and TXC。 We have develop a product using lithium battery. The product is more stable than using coin cell. But now, we must using coin cell in this product .so i want resolve this problem. And we have tested the product production by other company ,there is same problem as we met. So we doubt the coin cell(the power system). Phenomenon is break rewiring system, we still not sure is a software reset signal is bad, button cell adopt "mode, the voltage instability. This is our actual test condition.

[Dave_couling]

Unfortunately you haven't provided enough information for me to be able to help. There are many many possible root causes for such a situation. I would need more information to be able to help.

What are you connecting to? iPhone/Android?

What version of SDK?

What version of softDevice

What type of antenna?

Have your crystal loading capacitors been properly tuned?

What is your steady state (System-ON) input current level?

What is the peak current level?