BQ76940: UNUSUAL NTC SPIKE OBSERVED AT -20Deg

Hi Smit,

A few things:

• Are you seeing this across multiple thermistors, or just one?
  
  
• Could you please provide a waveform of this behavior showing the supply voltage and the TSx pin voltage that you seeing this on?
  
  
• Could you also share your schematic for us to review?

Regards,

Max Verboncoeur

I am seeing this behavior across only one thermistor, i.e. used in as a 4th NTC channel in my BMS,
but according to my IC it is TS1, 
the Waveform is 
when i change my supply voltage from 48 to 42 V abruptly it fluctuates from 2.93V to 2.77V 

GND 2 is my AFE's VSS 

Hi Smit,

Could you share the full schematic of the AFE and its connected circuitry?

If you wish to share it privately, you are able to through E2E direct messages.

Regards,

Max Verboncoeur

Please share your email address I can share the circuitry over there

Hi Smit,

I've sent you a friend request on E2E. After accepting, you will be able to send the schematic to me privately through the E2E direct messages.

Regards,

Max Verboncoeur