For my electronic load project, I decided to use a
Texas' INA226. If I went with the INA219 (high-side only), I'd have to use 2 shunt resistors: one, high-side, for the INA219, and another one, low side, for the opamp's feedback. Plus the INA219 is limited to 26V, and I'd like to go up to 30V.
1) Using the INA226, I can share the same shunt resistor for the INA226 and the opamp feedback, correct?
2) If I understood the INA226 datasheet correctly, when used on the low-side, it must be the last device in the current loop before ground. Is that correct? Is so, it means I cannot use this project as a constant current source for other devices that I'd connect after the load, such as a battery I wish to charge or a LED I wish to test.
3) Does the VBUS pin always have to be connected to the Vin pin? Can I connect the VBUS pin to the high side of the load, before the FET?
thank you!