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TPSF12C1: Application for robot

David Huang
Intellectual 2285 points
Part Number: TPSF12C1

Hi team,

My customer is considering using TPSF12C1 in their next-gen robot design.

Could you please advice on the following concerns of the customer?

1. Robot noise frequency varies from 4kHz - a few MHz . Is there a way to deal with this wide range noise using TPSF12C1?

2. The capacitance of the noise source varies from 1000pF to 100nF depends on the use case of the robot. Is there a way to deal with this wide range of capacitance using a universal TPSF12C1 design?

Regards,

  • 0
    TI__Guru 73602 points

    Hi David,

    1. The TPSF12C1 is designed to reject AC line frequency (-100dB) and the sensing gain doesn't recover to 0dB till ~100kHz. As a result, the AEF does not really contribute until ~50kHz, achieving ~15dB attenuation at 100kHz, etc.

    2. Is this an AC input application or DC? And what is the power level? The noise source impedance has a relatively small impact on stability, but it is in series with the first common-mode choke, which dominates the regulator-side Thevenin impedance. You can check the TPSF12C1 quickstart calculator and change the parameters as needed to examine the behavior.

    --

    Tim