TPS61088 - Testing and research

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Dikxita

Joined Apr 22, 2024
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Hey there, I have implemented one circuit for Boosting purpose in which I have used TPS61088 IC. I want to measure Switching frequency and duty cycle. In order to do that i have probed at FSW pin(Signal is yellow colour). I have also probed at Vout pin(signal in green colour) to record output voltage for my reference.

original board- when EN is on.jpg


Following are my queries:
1. Why I'm getting triangular like shaped waveform at FSW pin?
2. To measure switching frequency and duty cycle, is FSW is the pin i have to probe it or SW?
3. How to measure switching frequency and duty cycle?

Below is the circuit for this testing:

1715865052950.png
 

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