4 Pin Failure Mode Analysis (Pin FMA)

This section provides a failure mode analysis (FMA) for the pins of the UCC27624-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:

• Pin short-circuited to ground (see Table 4-2)
• Pin open-circuited (see Table 4-3)
• Pin short-circuited to an adjacent pin (see Table 4-4)
• Pin short-circuited to supply (see Table 4-5)

Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.

Figure 4-1, Figure 4-2, Figure 4-3, Figure 4-4, and Figure 4-5. For a detailed description of the device pins, see the Pin Configuration and Functions section in the UCC27624-Q1 datasheet.

Figure 4-1 D Package Pin Diagram

Figure 4-2 DGN Package Pin Diagram

Figure 4-5 DSD Package Pin Diagram

Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:

• Pin 1 shorted to pin 8, and pin 4 shorted to pin 5, are not considered.
• The case of a short-circuit to supply is analyzed as a short to VDD.