ULC1001-DRV290XEVM:OUTPUT

WONBIN LEE

Part Number: ULC1001-DRV290XEVM
Other Parts Discussed in Thread: ULC1001

Tool/software:

Hello,

I measured the output waveform of ULC1001.
Why is there no output briefly in the first waveform?
Why does the second waveform swing up and down?
Is there any analysis data on the output of ULC100?

The settings of my GUI are as shown below.

over 1 year ago

0 Hailong Chen over 1 year ago

TI__Expert 3690 points

Thanks for your question. The first PWM blip is the Temperature Check. For the second waveform, could you zoom in and see if there are just small overshoots?

0 WONBIN LEE over 1 year ago in reply to Hailong Chen

Intellectual 260 points

Can you tell me the algorithm for checking the temperature?

The image below is an enlarged photo of the second waveform.

Is there a reason why the waveform fluctuates?

0 Hailong Chen over 1 year ago in reply to WONBIN LEE

TI__Expert 3690 points

Wonbin, the ULC1001 obtains the temperature info by periodically checking the impedance of the LCS at certain frequencies. The impedance can be directly calculated and converted into the temperature. This is why you can see the small waveform pulse.

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ULC1001-DRV290XEVM:OUTPUT