TPS546C23: TPS546 Schematic

Hi Kapil,

I provided a link below to a design calculator and schematic checklist. It would help speed up the schematic and layout review to fill out the design calculator and go through each of the 4 rails.

TPS546C20A and TPS546C23 Excel Calculator and Layout Checklist

Hello Tomoya,

Thanks for sharing the design calculator. I will use the same and speed-up the design.

As I mentioned earlier, for output generation how can I control 

1. FB/DIFFO/COMP (with Hardware

2. PMBus

3. Both option to control o/p voltage

And how can I monitor the parameters.

Note: How can I Enable the regulator as well (I can see there is no pin)

Hi Kapil,

The best way to adjust the Vout for TPS546C23 is to use the PMBus or connect the resistor divider after the DIFFO, as shown in the figure below.

Hello Tomoya,

Thanks for the response. I can see you have connected one resistor along with MOSFET. So what is role of MOSFET and how can I control the MOSFET?

Regards

Kapil

Hi Kapil,

The R1 and the resistor form the resistor divider to set the output voltage. You can turn on/off MOSFET through a GPIO, etc., of the microcontroller to select which resistor divider/output voltage you want to enable/disable. Does that make sense?

Hi Tomoya,

Yes. It means, to enable the regulator we are using MOSFET. So the regulator doesn't have the EN pin??