MC33774: RC filter design for cell voltage sensing

[Bhuvi_M1]

Hello,

1. What are the recommended range of values for resistor and capacitor used as an external RC filter for cell voltage sensing of 'MC33774ASP1AE'  battery cell controller?
2. Also, what are the design considerations to keep in mind while selecting the R&C values of the filter. Are there any formulas or reference in calculating those values (please share the same)
3. What is the sampling time interval of voltage measurement of "MC33774ASP1AE" ?

Looking forward to hearing from the community!

[TomasVaverka · Accepted solution]

Hello Bhuvi,

1 & 2. Figure 58 in the MC33774A full datasheet (classified as a secure file requiring an NDA) shows the recommended cell terminal connections first order low-pass filters, cell balancing connections and ESD protection capacitors:

The component values and comments are described in Table 41:

3. 17us typically.

BRs, Tomas

[Bhuvi_M1]

Thanks for the prompt response!