Re: Load Side Accumulation with PAC1934
The "concern" is that power is "upstream" voltage (Vbus in the datasheet, or the voltage at SENSE+) times Vsense (Vsense+ - Vsense-) So power includes both load power and sense resistor wasted power. I think with good sense resistor selection the sense resistor power is negligible.
However, I just remembered a way to measure power not including sense resistor dissipation. Current measurement can be (and power always is) bidirectional (2's comp). Just connect the sense lines backwards so that source is on SENSE- and load is on SENSE+. You set operation to bi-directional, and now you are measuring load voltage and power. Current and power are negative, so invert and be happy.