TMS320F280049: ePWM line treatment just after reset

Hitoshi Sugawara

Part Number: TMS320F280049
Other Parts Discussed in Thread: TIDM-1000

Hi Experts,

This is a digital power solution for automotive.
Is it safer to add a pull-down or pull-up resister onto ePWMx_A/B which are connected to the gate drives?
I have to make sure the safer HW setting just after reset.
The ePWM x_A/B pins must be GPIO input just after the reset so the lines for the gate drivers or buffers are Hi-Z meaning unstable.

I believe that the pull-down resisters seem safer.
If so, do we have any recommended resister value for that?

Thank you for your kind check and recommendations.
Best regards,
HItoshi

over 7 years ago

0 Manish Bhardwaj over 7 years ago

TI__Mastermind 43730 points

I have used 10k as pull downs in many schematics. see TIDM-1000.

But please note, many Automotive grade gate drivers will have an enable disable pin, and this pull down is an optional protection if one uses the gate driver enable disable.

I have added some colleagues from gate driver team to comment as well. And another colleague of mine to cover the motor control aspect.

-Manish

0 Hitoshi Sugawara over 7 years ago in reply to Manish Bhardwaj

TI__Mastermind 21160 points

Hi Manish,

It is very helpful.
Will treat it accordingly.

Thank you so much for your support.
Best regards,
Hitoshi

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280049: ePWM line treatment just after reset