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TPA3223: Proper values of bootstrap capacitors

Part Number: TPA3223

In the datashet the ideal values for the four bootstrap capacitors is rcommnded to be 33nF while figure 10.6 and 10.1 show 220nF. Th eval modul uses 33nF as well. It appears, that 220nF can be critical in terms of efficiency specially if PVDD is less than 30V.

  • Hi Guenter

    The boostrap capacitor is recommended 33nF to 220nF. If the capacitance of the boostrap capacitor is not large enough, it may resulting in a false OC,  33nF is the minimum recommended value. You can select the suitable value depend on your actual application.