UCC27611: Electrical Characteristic of VOH and VOL

María Angeles Jalón Victori

Part Number: UCC27611

I am writing in connection with the UCC27611, a gate driver optimized for 5V drive. I have a question about the electrical characteristic of VOH, VOL included in the Datasheet of the component:

Nevertheless the Absolute Maximum Ratings specifies the following:

Being the Output structure:

It seems that OUTH voltage will rise up to VREF instead of VDD. I'm a little confused with this.

Thank you for your help in this matter.

over 7 years ago

0 Lixing Fu over 7 years ago

TI__Expert 3225 points

Hello,

UCC27611 has an internal LDO, which regulates the internal voltage to 5V. So you are able to input from 4V to 18V, but the output logic level will always be 0V/5V when the VDD voltage is higher than 5V. This part cannot be used for the applications that needs higher than 5V of gate voltage. Hope this helps.

Thanks and regards,
Lixing

0 María Angeles Jalón Victori over 7 years ago in reply to Lixing Fu

Prodigy 30 points

Hello,

The pictures that I attached with the previous quention have been lost, sorry.

Your answer is what I thought. But the Electrical Characteristics Table of the Datasheet specifies a minimum VOH level of VDD-0.05, where VDD = 12V. Is this wrong? This is my question.

Thanks and regards

0 Massimiliano De Cristofaro over 7 years ago in reply to María Angeles Jalón Victori

TI__Expert 6640 points

Hi Lixing,

do you have any feedback about the last question?

What the customer needs to know is the minimum voltage limit for VOH. Datasheet says that is VDD-0.05 (being VDD=12V), is this true?

Thanks a lot in advance.

Best regards,
Massimiliano De Cristofaro
TI Staff Field Application Engineer

0 Lixing Fu over 7 years ago in reply to María Angeles Jalón Victori

TI__Expert 3225 points

Hello,

I am sorry for the late reply since I was out of office this week. Yes you are right. I think it is a typo. The output should be refer to VREF which is 5V, but not VDD. Therefore, the output minimum should be VREF -0.05V.

Please let me know if you have any other questions.

Thanks,

Lixing

0 Lixing Fu over 7 years ago in reply to Massimiliano De Cristofaro

TI__Expert 3225 points

Hi Massimiliano,

I am sorry for the late reply since I was out of office. I have answered the question in this thread.

Thanks and regards,
Lixing

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UCC27611: Electrical Characteristic of VOH and VOL