UCC27712-Q1: How much the resistance of input pin?

Soichi Nishimura

Expert 5195 points

Part Number: UCC27712-Q1
Other Parts Discussed in Thread: UCC27712

Hi team,

Could you tell me the pull-down resistance of input pin?

Regards,

Nishimura

over 4 years ago

0 Richard Herring over 4 years ago

TI__Mastermind 23135 points

Hello Nishimura,

The input pin pull down resistance on the UCC27712 is 400k ohms typical value.

Confirm if this addresses your question, or you can post additional questions on this thread.

Regards,

0 Soichi Nishimura over 4 years ago in reply to Richard Herring

TI__Expert 5195 points

Hi Herring,

Thank you for your answer.

I have an additional question.

The input filter resistance is recommended in the range of 10ohm to 100ohm. Could you tell me the reason why the value of capacitance is recommended?

Regards,

Nishimura

0 Richard Herring over 4 years ago in reply to Soichi Nishimura

TI__Mastermind 23135 points

Hello Nishimura,

In the UCC27712 datasheet section 7.3.3 (input stage) there is some guidance and description of the input stage and recommended filter ranges. In general it is recommended to have fast rise and fall times on the driver inputs to avoid multiple triggering on slow input signals. The input filter time constant is recommended to be 20ns or less for reasonable rise and fall times on the driver input pins.

Regards,

Power management

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UCC27712-Q1: How much the resistance of input pin?