UCD3138: Questions about CBC and blanking window (minimal duty output)

Hello, where does the above Chinese description copied from?

Hi Bosheng sun,

Pls see the attachment and give me some suggestions ,thanks.UCD3138的逐週期保護功能說明.pdf

the CBC function is disabled during blanking window, so even if the current signal exceeds the CBC threshold during blanking window, the PWM pulse width is not chopped. To reduce this minimum duty, you can reduce the blanking window.

Hi Bosheng sun,

Will you recommend tuning blanking window dynamically  if I want to reduce the minimum duty? thanks.

Hello, the blanking window is used to prevent CBC from being mis-triggered by any spike at the beginning of the current sense signal. You can change the blanking window as far as you can guarantee that CBC will not be mis-triggered.