I must be missing something with this calculation because I can't get the same results
R(SNS) = V(SNS) / I(O(REG))
In the example R(SNS) = .2 Ohms and I(O(REG)) = .5 A. This would mean that the V(SNS) voltage is 100mV not 125mV.
What am I missing here?
Thanks
Hi Parker,
Welcome to E2E!
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The example is concerning the BQ2057 and not the BQ2057W which has V(SNS) being 105 mV and 125 mV respectively. As the example shows a BQ2057 configured for 0.5A charging, RSNS being 0.2 Ohms correlates to V(SNS) being within the range of V(SNS) specification for the BQ2057 as shown in the image below.
