TPSM82913: inverting Buck boost usage

Genius 4155 points

Part Number: TPSM82913
Other Parts Discussed in Thread: TPS62913

Hi,

I suppose TPSM82913 can also use as IBB. Is there any additional concerns if we try to use TPSM82913 for IBB?

Regards,

over 1 year ago

+1 Steve Schnier over 1 year ago

TI__Expert 4600 points

Hello,

While I haven't built an EVM with the TPSM82913 in an IBB configuration, you should be able to follow the same design procedure as the TPS62913IBB EVM to do that. https://www.ti.com/lit/pdf/slvuc22

0 Go over 1 year ago in reply to Steve Schnier

Genius 4155 points

Hi, Steve

Thank you for your advice.

As your advice that gave me on another thread(https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1204611/tps62913-ibb-evm-question-about-the-evm-user-guide/4547699#4547699),
we shouldn't place CIO for IBB with TPS62913.

According to the Functional Block Diagram on TPSM82913 D/S, we can find the capacitor placed between VIN and GND as follows.

I think this cap may become CIO if we use TPSM82913 as IBB, so does it mean that IBB configuration of TPSM82913 is not recommended?

Regards,

0 Steve Schnier over 1 year ago in reply to Go

TI__Expert 4600 points

Hello,

You can still use the TPSM82913 in an inverting buck boost configuration, but you will have to use the diode as recommended when CIO is present.

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TPSM82913: inverting Buck boost usage