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TPA3131D2: Bulk capacitor value selection

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Part Number:TPA3131D2

Hello all,

Regarding the value of the bulk capacitors required for PVCC:

In the product's PDF it is mentioned that (page 22)

"Select the bulk capacitors at the PVCC inputs for proper voltage margin and adequate capacitance to support the power requirements. In practice, with a well-designed power supply, two 100-μF, 50-V capacitors should be sufficient"

There is two versions of output power - 2X4W and 2X25W (TPA3131D2 or TPA3132D2)

The bulk capacitor value recommendation doesn't say for which power it refers to...

If I use only 2X4W, and components size is an issue in my design - Is there any way to calculate the actual required capacitance?

Thanks 

Nir 


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