TPS54227: About REG5 Capacitor

Hide

Guru 21045 points

Part Number: TPS54227

Hi Jason-san,

I understand that a recommended value of bootstrap capacitor is 1.0uF.

However, I would like to know a recommended minimum effective capacity value.

Could you please let us know if you have any information?

And, if an effective capacity value is 0.34uF, is this TPS54227 operating correctly?

Regards,

Kanemaru

over 5 years ago

0 Jason Wang (BSR-MV) over 5 years ago

TI__Genius 9550 points

hi,
Noticed that you open another thread and ask same question.
You mentioned effictive capacity value. how do you get/ensure this value? what is the capacitor's typical value you use?

0 Hide over 5 years ago in reply to Jason Wang (BSR-MV)

Guru 21045 points

Hi Jason-san,

I apologize for confusing you.

Typical value is 1uF and 0.34uF is decreased by DC bias.

Therefore, I would like to know a recommended minimum effective capacity value.

Regards,

Kanemaru

0 Sam(MPAA) Zhang over 5 years ago in reply to Hide

TI__Mastermind 19080 points

Hi,

As we replied in another post,
e2e.ti.com/.../2715749
It should be good with the capacitance value.

Regards,
Sam

0 Hide over 5 years ago in reply to Sam(MPAA) Zhang

Guru 21045 points

Hi Sam-san,

Thank you for the information.

Regards,

Kanemauru

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TPS54227: About REG5 Capacitor