TIOL111: Can TIOL111 be used with 48V L+?

Hello Nakai-san,

While the recommended absolute max voltage is 36V, I expect the TIOL111 would work with a voltage of 48V.  The absolute max voltage that can be applied to the pin is 60V and I know that damage will not occur when the voltage applied is 60V or less.  Therefore I certainly do not expect any abnormal behavior from the TIOL111 if the L+ voltage is 48V.

However, the maximum voltage that was used to set all the datasheet parameters is 36V and we cannot certify the datasheet limits beyond 36V.  The customer would need to evaluate the device for proper operation at this higher voltage condition to ensure it meets their criteria.

I would not recommend using the version of the device with the internal 3.3V or 5V LDO because there will certainly be excess heating issues when used at a higher voltage.  I would also be more cautious with what type of load is applied to the CQ pin because if it is inductive, there can be a kickback voltage that causes a large momentary voltage spike. One of the advantages of having a large overhead between the L+ voltage (such as 36V) and the absolute max voltage of 60V, is there is more margin for these types of kickback voltages without risk of violating the absolute maximum limit.  These types of considerations would need to be made when operating at a higher voltage.

The TIOL111 has protection circuits to clamp large inductive loads, and ESD events, but I want to make the point that while it is possible to operate the device with 48V, there may need to be some extra testing done by the customer because this is outside of the current datasheet limits.

Regards,

Jonathan

 Hello Jonathan,

 Thank you very much for your reply and detal explanation. I could understood what you said well.

 Could I ask you an additional question?

 Power line (+L) maximum voltage of the competitor device is 65V and the device price is lower than TIOL111.

 So probably they would choose the competitor device.

 Do you have any plan to RTM new IO-Link device transceiver? If yes, I may be able to introduce it to the customer.

 Could you please give me your reply?

 Thank you again and best regards,

 Kazuya Nakai.  

Hello Nakai-san,

I am glad I was able to answer your question and I am happy to support you.  Regarding your second question, I would prefer not to discuss our future roadmap plans on this public forum.  Would you mind if I emailed you directly with my response?

Thanks and Regards,

Jonathan

 Hello Jonathan,

 Thank you for your reply.

 I see.

 Could I have your e-mail address?

 Thank you again and best regards,

 Kazuya Nakai.

Hello Nakai-san,

I sent you an email at the address you used for your E2E account registration.  Please let me know if you have any additional questions that I can help you with.

Best Regards,

Jonathan