TPS65235-1: Measuring method of "Gain and Phase Margin of the Boost Loop (like a Figure12)”

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Guru 21045 points

Part Number: TPS65235-1

Hi Team,

We would like to know the measuring method of "Gain and Phase Margin of the Boost Loop of TPS65235-1.

So, we have two questions.

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[Q1]

Could you please let us know a connection place and value of the Injection resistor?

I understand that Normal DC-DC connects around 51ohom to the following place.

*Normal DC-DC image

[Q2]

Could you please let us know if you have recommended value of injection signal (**mVpeak) from “Frequency Response Analyzer(FRA)”?

By the way, we use FRA5096.

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Regards,

Kanemaru

0 Zhao Ma over 7 years ago

Hi, Sir

Due to the divider resistors of BOOST converter is built in IC internal, so we cannot test the Bode plot for BOOST converter in EVM board.

The Figure12 and Figure13 is provided by designer, they are the simulation result.

Q1: N/A.

Q2: Usually recommend 50mV injection signal.

0 Hide over 7 years ago in reply to Zhao Ma

Guru 21045 points

Hi Zhao-san,

Thank you for your prompt reply.

I understand. Thank you very much.

Regards,

Kanemaru

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