The purpose of this document is to provide the circuit designer with some insight into how the TDE1897C, TDE1897R, TDE1898C and TDE1898R devices behave in extreme overload conditions. These devices are monolithic intelligent power switches (IPS) in high-side configuration, suitable for driving resistive and inductive loads. They exhibit extreme ruggedness and ability to overcome accidental overload.
This document provides circuit designers with insights into how the TDE1897C, TDE1897R, TDE1898C, and TDE1898R monolithic intelligent power switches behave when subjected to extreme overload conditions. These conditions may occur due to erroneous connections or accidental overloads during installation, potentially exceeding the limits specified in the device datasheet. The note confirms the devices' ruggedness and ability to handle such accidental events.
The document details the results of tests performed on these devices in bias conditions that lead them to function outside their rated limits. It describes the internal protection mechanisms, such as current limitation and thermal protection, and explains the periodic cycle of load charging, current limitation, over-temperature demagnetization, and cooling down that occurs during these extreme events.
To provide the circuit designer with insight into how the TDE1897C, TDE1897R, TDE1898C and TDE1898R devices behave in extreme overload conditions.
Yes, the tests show that it is quite likely that such devices will survive non-permanent overloads like those occurring during installation or modification of an industrial control system.