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TPS61150 / PWM dimming frequency

K.Yaita
Guru 29690 points
Other Parts Discussed in Thread: TPS61150

Hi,

I'd ask about TPS61150 PWM dimming frequency.

In datasheet P.12 equation(4), it indicates "Fpwm_max=Dmin/Tisink(6us)".

According to this equation, Dmin is calculated 18% at 30kHz.

But, Figure.9(P.8) shows Duty Cycle below 10% at 30kHz, and it seems to keep linearity down to 10%.

Is 10% duty is unrecommended at 30kHz?

Regards,

Yaita