Hello!
I am reviewing the schematic to review the product characteristics.
I want to measure the voltage change at the OUT pin while applying 2A to (OUT) at one pin.
When 2A does not flow to the voltage meter, but only flows out to the pure out,
OP Amp. I want to write
I wonder how the op amp works and how much model it should be used in case of 2A condition.
I heard roughly that someone I know could use an op amp, but I couldn't hear the detailed explanation.
I have a question.
Thank you for your high-level advice.
Answer2
When measuring voltage with a commercially available digital multimeter, the internal resistance of the multimeter is usually over 10 Mohms.
Therefore, the current flowing to the Voltage Meter is negligible. For example, if the output voltage is about 10V, the current flowing to the Voltage Meter is only 1uA.
Of course, if you configure a Voltage Follower circuit using OPAMP, you can increase the input resistance value of voltage measurement.
I don't know if it is necessary to configure the OPAMP with both power sources. if necessary
By composing the Voltage Follower circuit as above, the input resistance can be raised to hundreds of Mohms or more.
However, in this case, an error may occur in the voltage measurement due to the offset voltage of the OPAMP.
First, check the input resistance value in the voltage range of the voltgae meter you will be using.