LM3435: Thermal issue when LED open and PWM keep input.

Part Number:LM3435

Hi Team,

We measured around 100C on the inductor when panel non-connect (LED open) and PWM keep input to G/B/R_CTRL pin.

If we disable PWM input, the temperature back to normal.

I am curious why there is no load, but cause high temperature.

And why PWM affect the temperature even if there is no load.

Thanks