TPS62170 / Inverting Buck-Boost Topology

Tsukui Yusuke

Guru 21930 points

Other Parts Discussed in Thread: TPS62170

Hi,

Could you tell me about TPS62170 inverting buck-boost topology?
Our customer would like to use TPS62170 at the following application note conditions.

SLVA469C
www.tij.co.jp/.../slva469c.pdf

In that situation, Customers want to calculate the ILIMF_HS.
Data sheet Page 15,16 shows the following formula.
May I just use this expression?
Please tell me the part to change for buck boost.

Best Regards,
Yusuke/Japan Disty

over 9 years ago

0 Chris Glaser over 9 years ago

TI__Guru**** 150870 points

During the on time, the voltage across the inductor is Vin to GND instead of Vin-Vout.

0 Tsukui Yusuke over 9 years ago in reply to Chris Glaser

Guru 21930 points

Chris-san,

Thank you for your support.
I inform a customer of your information.

Thanks,
Yusuke.

0 Tsukui Yusuke over 9 years ago in reply to Chris Glaser

Guru 21930 points

Chris-san,

Thank you for your support.
Let me ask you one more thing.
Are ILIMF and ILIMF_HS the same meanings?
Could you tell me your advice?

Best Regards,
Yusuke/Japan Disty

0 Chris Glaser over 9 years ago in reply to Tsukui Yusuke

TI__Guru**** 150870 points

Yes, they are the same.

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TPS62170 / Inverting Buck-Boost Topology