ISO5452: What is the minimum pulse width of H level signal and L level signal at IN+/IN-?

Kazuya Nakai59

Part Number: ISO5452

Hello guys,

One of our customer is evaluating ISO5452DW on their own board for their next products. They want to know the answers of the following questions. Could you please give me your answers?

1. What is the minimum pulse width of H level signal and L level signal at IN+/IN-? Is it 40ns?

2. If the minimum pulse width of H level and L level is 40ns, what is the output pulse width of OUTH/OUTL when H level or L level input signal with pulse width less than 40ns is input to IN+/IN-? Are OUTH and OUTL level not changed? the previous level is kept? Also is there any problem or malfunction when such short pulse signal is input?

3. When the customer uses ISO5452, do they need to filter the short pulse input signal less than 40ns?

Your answers would be appreciated.

Best regards,

Kazuya Nakai.

over 8 years ago

0 Jeffrey Mueller over 8 years ago

TI__Genius 12990 points

Hi Kazuya,

ISO5452 Rejects Input Pulses and Noise Transients Shorter Than 20 ns - I found this info on first page of the DS and can be seen in the electrical characteristics. 40ns is the maximum. The 40ns input filter is not necessary due to the deglitch filter.

What application are you using this gate driver for? is the 40ns narrow pulse width on the input due to noise?

Thanks,

0 Kazuya Nakai59 over 8 years ago in reply to Jeffrey Mueller

Guru 22295 points

Hi Jeff,

Thank you very much for your prompt reply.

The application uses ISO5452 is a inverter system. Yes, we assume the 40ns pulse width to be a noise.

Thank you again and best regards,
Kazuya Nakai.

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ISO5452: What is the minimum pulse width of H level signal and L level signal at IN+/IN-?