The TPS23882B is an eight-channel PSE for Power over Ethernet applications. Each of the eight channels provides detection, classification, protection, and shutdown in compliance with the IEEE 802.3bt standard.
Basic PoE features include the following:
- Performs high-reliability 4-point load detection
- Performs
multi-finger classification including the 100-ms long first class finger for
autoclass discovery and to identify as a 802.3bt complainant PSE
- Enables power with protective foldback current
limiting and an adjustable PCUT threshold
- Shuts down during faults such as overcurrent or outputs shorts
- Performs a maintain power signature function to ensure power is removed if the load is disconnected
- Undervoltage lockout occurs if VPWR falls below
VPUV_F (typical 26.5 V)
Enhanced features include the following:
- Programmable SRAM memory
- Dedicated 14-bit integrating current ADCs per port
- Port re-mapping capability
- 8- and 16-bit access mode selectable
- 1- and 3-bit port shutdown priority