Si3402 PoE PD Interface and Switching Regulator

The Silicon Labs Si3402 PoE PD interface and low-EMI switching regulator integrates all power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application and converts the high voltage supplied over the 10/100/1000BASE-T Ethernet connection into a regulated, low-voltage output supply. The Silicon Labs Si3402 integrates the required diode bridges and transient surge suppressor to enable direct connection of the IC to the Ethernet RJ-45 connector. The switching power FET and all associated functions are also integrated into the Silicon Labs Si3402.