LM5170-Q1: LM5170-Q1 : How to measure the frequency response of current control

Wade Liu

Part Number: LM5170-Q1

Hello!

We want to measure the actual frequency response of Inductor current control, and we have Frequency Response Analyzer (FRA5087 ).

Is there a recommended measurement method?

Thank you

over 5 years ago

0 Youhao Xi over 5 years ago

TI__Guru* 78200 points

Hi Wade,

Thank you for posting. The measurement can be done according the following diagram. You need to use differential probes to measure the loop. Also note that the injected perturbation should be in mV scale because the IC working signal is in ~100mV max.

LM5170 Inner Loop Measurement.pdf

Thanks,

Youhao Xi, Applications Engineering

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LM5170-Q1: LM5170-Q1 : How to measure the frequency response of current control