UCC28070-Q1: Blanking time of Ton

Hidekazu Someno

Expert 5130 points

Part Number: UCC28070-Q1
Other Parts Discussed in Thread: UCC28070EVM

Hello application team;

Does this part has the blanking time of turning ON at GDx outputs?

In other words, I would like to know the minimum on-time for current detection.

Best regards,

Hidekasu Someno

over 7 years ago

0 Yunsheng Qu over 7 years ago

TI__Genius 9790 points

hi, Someno

There is minimum on-time for current detection. The current feedback signal could be zero.

Regards,
Yunsheng

0 Hidekazu Someno over 7 years ago in reply to Yunsheng Qu

TI__Expert 5130 points

Hi, Yunsheng-san,
Thanks for your quick reply.

What is the minimum ON time?
Can you tell me the time?

Regards,
Hidekazu Someno

0 Yunsheng Qu over 7 years ago in reply to Hidekazu Someno

TI__Genius 9790 points

hi, Someno

There is minimum on time of duty could be 0.

Regards,
Yunsheng

0 Hidekazu Someno over 7 years ago in reply to Yunsheng Qu

TI__Expert 5130 points

Yunsheng-san,

Sorry. My explanation about what my customer would like t know may not have been appropriate.

As you know, Normally, ICs have a blanking time as the noise filiter to avoid the faulse current sensing is caused by ringing etc after switching turn on, . This IC also should have the blanking time.
I would like to know the blanking time.

Best regards,
Hidekaazu Someno

0 Yunsheng Qu over 7 years ago in reply to Hidekazu Someno

TI__Genius 9790 points

hi, Someno
there is no specification of blanking time of current limit comparator, a 1kohm and 220pF on CSA/CSB pin to generate blanking time is recommended, which is already on UCC28070EVM.

regards,
Yunsheng

Power management

Power management forum

UCC28070-Q1: Blanking time of Ton