2165506_en-US

[#1]

TJA1043

Hi, how to calculate the quiescent current of TJA1043 itself in a 12V system? I read in the TJA1043 datasheet that the quiescent current calculation involves PIN Vcc, PIN Vio, PIN Vbat, PIN TXD, PIN RXD, PINSTB_N, PIN EN, PIN ERR_N, PIN WAKE, PIN INH, PIN CANH &CANL, PIN SPLIT. Is it possible to add up all the quiescent currents on these pins to get the quiescent current consumption of the TJA1043? Is the quiescent current consumption of the TJA1043 obtained by adding up the quiescent currents of all these pins? Our product requires a quiescent current of 0.1mA or less, but according to the above scheme, the quiescent current of the TJA1043 alone is already very large, so I would like to ask if I understand the calculation method correctly, please advise, thank you!

Re: TJA1043

Hi, will the VBAT pin of TJA1043 cause the chip to burn up if reverse voltage is connected during testing?

Re: TJA1043

Hi,

For meeting 0.1 mA quiescent requirement, you must ensure the TJA1043 is placed into Sleep or Standby mode where a total internal current is typically a few tens of microamps — it is achievable.

BRs, Tomas