UCC27527: UCC27527

Varunesh Kumar

Intellectual 930 points

Part Number: UCC27527

Hello

I've two Q's reg the above.

1. Data Sheet mentions,

" The maximum voltage on the Input and Enable pins is not restricted by the voltage on the VDD pin. "

Does it mean that INA or INB can exceed the Vdd supply?

2. What is the Input Capacitance?

If I use a 4K7 Input Resistor, what may be the incremental increase in the Propagation delay?

Thanks and regards

Varun

over 5 years ago

0 dimitri james over 5 years ago

TI__Genius 10652 points

Hi Varunesh,

Varunesh Kumar said:

" The maximum voltage on the Input and Enable pins is not restricted by the voltage on the VDD pin. "

Does it mean that INA or INB can exceed the Vdd supply?

What you said is correct. basically its saying if VDD=12V (less than abs max), INA/INB abs max voltage is not going to be required to be less because VDD is less.

Varunesh Kumar said:

2. What is the Input Capacitance?

If I use a 4K7 Input Resistor, what may be the incremental increase in the Propagation delay?

I believe it is on the order of pF, but I am not sure. We dont' publish this figure for gate driver usually. A colleague with more expertise will be back on monday, they will respond to you about this question.

Best

Dimitri

0 Mamadou Diallo over 5 years ago in reply to dimitri james

TI__Genius 13445 points

Hi Varunesh,

I work with Dimitri in the High Power Drivers group.

Maximum input capacitance is approximately 30pF.

You will essentially add the delay caused by the external filter to the driver's inherent delay caused by the internal logic (17ns, typ.).

Regards,

-Mamadou

0 Varunesh Kumar over 5 years ago in reply to Mamadou Diallo

Intellectual 930 points

Hello Mamadou

Good morning and thanks for your reply.

You are always very helpful.

Thanks and regards

Varun

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UCC27527: UCC27527