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BQ2970: Unknown part on BQ2970 reference design

Part Number: BQ2970
Other Parts Discussed in Thread: TIDA-00669, CSD85301Q2

Hi everyone, I believe that this is a trivial question.. I am looking at the TIDA-00669 reference design and on page 15 it is presented the schematic. Looking at the battery protection section (BQ29707DSER) I cannot figure out what is the element between gate to source for each of the N-FET. Could someone please clarify what are those elements?

http://www.ti.com/lit/ug/tidub31/tidub31.pdf

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