BQ25723: BQ25723: input MLCC

Joe Chang

Part Number: BQ25723

Tool/software:

Is this recommendation also applicable to 2-cell, 3-cell, and 4-cell battery designs? If so, can we replace the input MLCCs with tantalum capacitors to eliminate audible noise? If this substitution is feasible, could you please suggest an appropriate solution?

over 1 year ago

0 Christian Moyer over 1 year ago

TI__Mastermind 48788 points

Hello Joe,

Joe Chang said:
Is this recommendation also applicable to 2-cell, 3-cell, and 4-cell battery designs? If so, can we replace the input MLCCs with tantalum capacitors to eliminate audible noise? If this substitution is feasible, could you please suggest an appropriate solution?

We recommend using a mix of Tantalum and MLCC. Tantalum caps are generally prefered for suppressing audible noise, while ceramic caps are better suited for filtering hig-frequency noise.

Best Regards,

Christian.

0 Joe Chang over 1 year ago in reply to Christian Moyer

Prodigy 10 points

Could you recommend an appropriate mix of tantalum capacitors and MLCCs for 45 W and 60 W systems? Specifically, what effective input capacitance is required for 2-cell, 3-cell, and 4-cell battery configurations, and how does it differ among them?

0 Christian Moyer over 1 year ago in reply to Joe Chang

TI__Mastermind 48788 points

Hello Joe,

I recommend refering to our schematic checklist for the recommend amount of input caps:BQ2570X_BQ2571X_BQ2572X_BQ2573X_SchematicChecklist (38).pdf

Best Regards,

Christian.

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BQ25723: BQ25723: input MLCC