TIDM-02000: Peak current blanking time configuration

Sandiage Chu

Prodigy 30 points

Part Number: TIDM-02000

Hello

I am confused about Blanking time configuration for peak current mode in application note TIDM-02000

I see in the application ,blanking time is configured to ignore current spike while lag leg(epwm1) pwm turn off?

am I correct ?

why does not blank while pwm turn on?

and why no need to blank leading leg (epwm2) pwm turn on-off time?

thanks~

over 3 years ago

0 Chen Jiang ti over 3 years ago

TI__Genius 15605 points

Hi Sandiage,

I will get back to you tomorrow. Thanks for your patience.

Regards,

Chen

+1 Chen Jiang ti over 3 years ago

TI__Genius 15605 points

Hi Sandiage,

You are right, the blanking window is mainly for the leading edge noise at turn on time.

The on and off of EPWM2A/2B are decided by comparator which are easily impacted by the leading edge noise of EPWM1A/1B. The turn on of EPWM2A/2B are decided by the deadtime and TZBU/TZAD so the leading edge noise of EPWM2A/2B will have less impact.

Regards,

Chen

0 Sandiage Chu over 3 years ago in reply to Chen Jiang ti

Prodigy 30 points

thanks，Chen.I am clear

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TIDM-02000: Peak current blanking time configuration