Example:
When a 12V car battery provides power to the devices in a car and a rear window heater is the load, then the 12V from the car battery is the "bus voltage" and the voltage over the heater is the "load voltage".
The 12V is connected to VIN+ and the heater is connected to VIN-.
On the website of Texas Instruments I found references that the "load voltage" is supposed to be the power supply, the input voltage at VIN+
However, they also call that the "bus voltage".
The datasheet of the INA219 is confusing. They say that the bus voltage is measured at pin VIN-
That is not okay.
I even found the phrase "load voltage drop", where they meant "shunt voltage".
So now the confusion is complete.
I suggest to make new names, and add explanation every time the old names are used.
Note: I have been editing this issue after finding "load voltage" references on the Texas Instruments website.
Aldo-aldo
commented
3 months ago
There is confusion between "load voltage" and "bus voltage" that is used in the library. I made this issue because of this forum topic: https://forum.arduino.cc/index.php?topic=735283.0
Example:
When a 12V car battery provides power to the devices in a car and a rear window heater is the load, then the 12V from the car battery is the "bus voltage" and the voltage over the heater is the "load voltage".
The 12V is connected to VIN+ and the heater is connected to VIN-.
On the website of Texas Instruments I found references that the "load voltage" is supposed to be the power supply, the input voltage at VIN+ However, they also call that the "bus voltage".
The datasheet of the INA219 is confusing. They say that the bus voltage is measured at pin VIN-
That is not okay.
I even found the phrase "load voltage drop", where they meant "shunt voltage".
So now the confusion is complete. I suggest to make new names, and add explanation every time the old names are used.
Note: I have been editing this issue after finding "load voltage" references on the Texas Instruments website.