TPS7H5001-SP: Transfer function: OTA

Hey Andres,

If you notice Ro/Co isn't actually in the transfer function.
They are effectively parasitics they decided to include in the diagram.

The equations in the datasheet are trying to place the poles/zeros of the compensator into positions where they cancel poles/zeros in the converter.

The full transfer function varies from converter to converter, so you also need to be specific about which converter you are trying to design towards.
If you are confused I highly suggest using power stage designer and reading compensation made easy:
/cfs-file/__key/communityserver-discussions-components-files/196/0412.slup340.pdf
https://www.ti.com/tool/POWERSTAGE-DESIGNER

Thanks,
Daniel

The converter is Full-bridge. So do I multiple Gmea by Gmps?

Hey Andres,

If your converter is a full-bridge I assume the controller is on the secondary side.
Otherwise you would need to figure out your isolated feedback and how that interacts with the control loop.

In the app note GMEA is the gm of the error amplifier.
GMPS is short hand for the gain of the power stage, which encompasses a different part of the circuit.

I highly suggest researching with the tools I listed.

Thanks,
Daniel