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TPS61042: Alternative Adjustable Brightness Control Using PWM Signal

Part Number: TPS61042

Hi team,

My customer use TPS61042 in their project. Below is the schematic.

The issue is when CTRL ON, the brightness of the LED does not change with ADJ, and there is no significant change in the voltage of Rs.

Could you please help review the schematic and give some suggestions?

Thank you!

Regards,

Ivy