Dear all,
I would like to ask about the circuit configuration of the amplifier connected to the FB pin.
In the following thread I posted earlier,
we discussed about connecting an operational amplifier to the FB pin as shown in the figure below and controlling the output voltage of the TPS61087 with the amplifier output.
https://e2e.ti.com/support/power-management/f/196/t/892774
At that time, I got advice from you that the operational amplifier connected to the FB pin should have a voltage follower circuit configuration rather than an amplifier circuit configuration.
Also, as a reason for the above advice, you told me in previous posts that it's hard to get a target voltage without the voltage follower configuration.
I think that the reason why it becomes difficult to obtain the target voltage is that in the case of an amplifier circuit, an error in the external resistance that determines the gain enters and the error in the amplifier output increases, but is there any other reason?
Best Regards,
Y.Ottey
