SN6501: How do I use the SN650x as a Photo-relay?

ACGUY

Part Number: SN6501
Other Parts Discussed in Thread: PMP9522

Hello E2E,

Our customer planning to stop using photo-relay.
I found the TID, PMP9522. www.tij.co.jp/.../PMP9522
Please let me know your opinion about if changenthe device from UCC2808 to SN650x on PMP9522.
Do you think that it will run? (I think that it will run.)

Regards,
ACGUY

over 6 years ago

0 Koteshwar Rao over 6 years ago

TI__Guru 53855 points

Hi ACGUY,

Thank you for using E2E Forum.
SN650x can be used as a photo-relay like UCC2808 is used in PMP9522. Since there are differences between UCC2808 & SN650x, you will be required to follow SNN650x recommended schematic from SN650x datasheet or EVM to make it work. One of the key differences is that UCC2808 has a totem-pole outputs where as SN650x has only open-drain outputs. Since the sinking current is also different for these devices, you may also notice a difference in turn ON/OFF times. Apart from these, it should work fine.

Let me know if you have any other questions, thank you.

Regards,
Koteshwar Rao

0 Koteshwar Rao over 6 years ago in reply to Koteshwar Rao

TI__Guru 53855 points

Hi ACGUY,

I wanted to understand more about your application and help you further optimize the design. Can I reach out to you directly on the email that you have used to create myTI account? Let me know, thanks.

Regards,
Koteshwar Rao

0 ACGUY over 6 years ago in reply to Koteshwar Rao

Guru 11170 points

Hi Koteshwar,

I think that if using SN650x that off-time is to be long. And, total cost is over then using photo-relay.
If we get chance, we do like to consultation.

Thanks,
ACGUY

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SN6501: How do I use the SN650x as a Photo-relay?