Datasheet

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AM Classification
TPS2384
SLUS634D – NOVEMBER 2004 – REVISED MARCH 2007
AUTO MODE FUNCTIONAL DESCRIPTION (continued)
After a successful discovery of a valid PD theTPS2384 enters the classification function that identifies the power
level based on the PD's current signature. The classification current level is measured at a reduced terminal
voltage of 17.5 V. During classification the power dissipation can be at its highest; therefore, to prevent over
temperature shutdown in auto mode only one port classifies at a time. When multiple ports successfully discover
and proceed to classification at the same time the auto sequencer processes each request separately allowing
only one port to enter classification. Figure 3 shows all 4 ports successfully detecting a valid PD at the same
time and than the classification of each port occurring separately.
Figure 3.
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