TPS61150A Dimming Minimum Duty

Hi,

'spec about minimum duty of dimming at 30KHz', do you mean the duty of the switch driving signal, not the dimming PWM signal? 

Pan-M,

The minimum on time is 6us. You can find this spec ti(sink) on page 5 of the datasheet. So the minimum duty of the 30kHz dimming frequency is 6us*30kHz=18%. Below the 18% duty cycle, the linearity is not good. But the LED still can be turned on. Please refer to Figure 9 on page 8.

thanks

Gavin

Hi

I want to know dimming PWM spec.
'Up to 30kHz PWM Dimming Frequency' written in the datasheet, but don't write minimum duty or on pulse width.
(How much is minimum duty value in Figure 9?)

PAN-M

Hi PAN-M,

I think Gavin has make it clear, minimun duty is 18%.

PAN-M,

As I said in the previous reply, the guaranteed minimum on pulse width is 6us.

thanks

Gavin

Thank you for answer Gavin-san

I understood your answer.

Thanks
PAN-M