JAJSJS0A June 2020 – September 2020 TPS23734
PRODUCTION DATA
The APD pin is used in applications that may draw power either from the Ethernet cable or from an auxiliary power source. When a voltage of more than about 1.5 V is applied on the APD pin relative to RTN, the TPS23734 does the following:
This also gives adapter source priority over the PoE. A resistor divider (RAPD1–RAPD2 in Figure 9-1) provides system-level ESD protection for the APD pin, discharges leakage from the blocking diode (DA in Figure 9-1) and provides input voltage supervision to ensure that switch-over to the auxiliary voltage source does not occur at excessively low voltages. If not used, connect APD to RTN.