MP2722 disable both ntc pins

Battery Management
1

Hi, I want to make sure that NTC1 and NTC2 pin can be left unconnected when disable them through I2C.
Is this right?
Kind regards, Robert

2

Hello Robert,

Can you please share which IC you are working with?

Thanks!

3

I am planning to use the MP2722GRH-0000-P charger IC with unconnected NTC1 and NTC2 pin. The MP2722 will be controlled via I2C by a µC in the application. From my experience, many charger ICs do not support open NTC pin, therefore my question.

4

Hello Mr. Voss,

I have not worked with this device yet. However, from the DS page 20 “Jeita Thermister Qualification” , I would agree with your viewpoint:

grafik
grafik710Ă—125 11.7 KB

Hope that helps?
BR

1 Like
5

Better late than never: By setting NTC1_ACTION and NTC2_ACTION to 0, the NTC pins can be left open.

6

Hi @robert.voss.437 and @klaus.buchenberg,

Yes, the NTC pins for MP2722 can be disabled by the NCT1/2_ACTION bits.
image

Thank you
Saurabh

7

Hello,

Can you confirm that, when NTC1_ACTION is set to 0, it is safe to float the NTC1 & VRNTC pins? I guess by safe, I mean that there will not be unexpected behavior or elevated power consumption.