LM5143-Q1: How to measure Bode Plot?

gong xing

Part Number: LM5143-Q1

Dear TI

Connect MODE pin to VDDA for interleaved signal-output operation,

when in signal-output operation,how to measure Bode Plot?

where to place the series resistor?

thanks!

0 Hongjia-Wu 7 months ago

Hi Xing,

You need to put a resistor divider on the FB1 pin and insert the ripple injection resistor between the RFBT and Vout.

Regards,

Hongjia

0 gong xing 7 months ago in reply to Hongjia-Wu

HI hongjia

so we should tie FB1 to Rdiver,FB2 to AGND, if there is no Rdiver, we can not measure Bode Plot?

0 Hongjia-Wu 7 months ago in reply to gong xing

Hi Xing,

Yes correct. The resistor divider is necessary for loop measurement.

Regards,

Hongjia

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