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Original question:

TIDA-010047: How to change the output voltage of TIDA-010047?

TIDA-010047: Need Support in understanding the benefits of having an X-Cap on the DC Line right after the Bridge Rectifier.

Amal Babu
Prodigy 30 points
Part Number: TIDA-010047

hi,

I am currently trying to evaluate the design so that i can reuse the TI parts and make certain modifications according to my parameters.

I happen to see that right after the bridge rectifier, CLC filter has been implemented for EMI reduction.

My concern here is regarding the C#1 275V AC, 220 nF used here is an X-CAP.

How exactly is the X-Cap benefiting me in this design when being placed right after the Bridge rectifier?

Would request you to reply me on priority as the project is on a critical juncture.

Amal

  • 0
    TI__Intellectual 2885 points

    Hi Amal,

    C1 could be moved to the other side of the bridge if desired. Additionally L1 could be moved to the other side of the bridge. This is just how the designers of TIDA-010047 chose to design the differential mode input filtering. 

    In either location, C1 will see an AC waveform. Before the bridge, the waveform will be purely sinusoidal. After the bridge it will be rectified sinewave.