9.1.1 Internal Thresholds

In order to implement the defined PoE functions shown in Figure 11, the TPS2376-H has a number of internal comparators with hysteresis for stable switching between the various states. Figure 12 relates the parameters in the Electrical Characteristics section to the PoE states. The mode labeled idle between classification and PD powered implies that the DET, CLASS, PG, and RTN pins are all high impedance.

Figure 12. Threshold Voltages