MC33775A

[Prahul_1208]

Dear NXP Team,
We are using MCU TMS570LC4357 via MC33664A to communicate with MC33775A. We are applying 14 cell voltages in slave cards.
TPL low signal is applied as an input signal through interface MC33664A in pins 45 and 46. but TPL High as an output does not give any output signals on pins 47 and 48.

Regards, 

Prahlad

[TomasVaverka]

Dear Prahlad,

I would recommend you to take a closer look at our AN13281 - HVBMS daisy chain communication guide (available as a secure file requiring an NDA), mainly sections 2.2.2 - TPL3 and 2.3.3 - MC33664 amplitude.

It is worth checking if the wakeup pattern is correctly issued to the MC33664. For debugging I recommend a Saleae Logic Analyzer + TPL Decoder plugin:

https://www.nxp.com/products/power-management/battery-management/battery-communication-ics/battery-m...

BR, Tomas