ISOTMP35 is an analog temperature sensor that is capable of being placed across a high voltage isolation boundary. This allows the ISOTMP35 to be placed directly onto either a high voltage bus bar or onto the heat sink of a high-power FET. Because of this direct contact, heat does not need to transfer through PCB material to make it across the isolation boundary, but instead the direct contact provides immediate temperature response and a much more accurate final temperature value. This is important because a faster response time and more accurate final value can help provide better overheating protection in a variety of customer systems.

Figure 1-3 ISOTMP35 Example