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Power generation for AM1808 by using TPS65023

Yashpal Patel49892
Expert 1835 points
Other Parts Discussed in Thread: TPS65023, AM1808

Hi,

We want to use TPS65023 IC in our project for AM1808 controller.

Can you advice how can I generate 1.2V at VDCDC3 output pin by using DEFDCDC3.

In the datasheet mention DEFDCDC3=0 then VDCDC3=1.8V and DEFDCDC3=1 then VDCDC3=3.3V.

Pls do the needful.

Regards,

Yashpal

 

  • 0
    TI__Mastermind 36110 points

    The "Step Down Converters .... " paragraph on page 21 of the TPS65023 data sheet provides a good explanation of the possible output voltages and how to achieve these output voltages.  VDCDC3 can be set to 1.2V by connecting a resistor divider between VDCDC3 and ground with the center tap between the resistors connected to DEFDCDC3.   Paragraph "Output Voltage Selection" also provides more information, including the equations for selecting the resistor values.