TDE1767DP Output logic and Reset pin functionality

[Praveenv]

We have selected TDE1767DP TDE1747FPT part as a replacement part for TDE1767DP. I have two questions in this case.

The first question is: Both the parts has a capability to shut down the driver when internal dissipation becomes too high to prevent excessive heating. But in addition to this, TDE1767DP part has Reset Pin (Pin No: 5) which controls the output as below:

The output stays null after the overheating is off, if the reset input is low.

If high the output will alternatively switch-on and off until the overload is removed.

I would like to know how this (Reset) functionality is controlled when the overheating is in off state in TDE1747FPT.

Second Question: It is regarding the output logic. To get the similar output when we use TDE1747FPT IC in place of TDE1767DP do we need to swap the inverting and non inverting inputs because the output side of TDE1747FPT has the NPN transistor logic and TDE1767DP has the PNP logic.

[Peter BENSCH]

Welcome @Praveenv, to the community!

As the TDE1747FPT is not a direct replacement for the TDE1767DP, it does not necessarily have the same functions. You would have to retrofit the pin reset function to the TDE1747FPT externally, e.g. by blocking the input.

As far as your question about the inputs is concerned, nothing needs to be swapped, as you can see in the comparison of fig 16 (TDE1767DP) and fig 14 (TDE1747FPT). Note, however, that the shunt is connected differently.

Hope that helps?

Regards
/Peter

[Praveenv]

Thanks Peter for the reply.

Yes, TDE1747FPT is not the direct replacement for the TDE1767DP because of its pin count and reset functionality.

In Datasheet of TDE1767 it is written as "This output is low in open ground conditions and in case of overload and reset for high input, it switches on and off alternately until the overload is removed." and in our previous design, the reset pin (Pin no.: 5) of TDE1767 is pulled high and Alarm pin is NC. Therefore, I wanted to know how exactly this impacts the functionality. If the impact is minor. I can choose TDE1747FPT (Reset and Alarm pins are not available) as a replacement.