PM8803 is a high efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller from STMicroelectronics, which complies with the IEEE 802.3at standard and can be powered by Ethernet LAN cables or local auxiliary power supplies.
The PM8803 integrates a standard compliant Power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of power supply sections for powered devices. The PoE/PoE+ interface incorporates all functions required by IEEE 802.3at, including detection, classification, undervoltage lockout (UVLO), and inrush current limitation. It specifically performs IEEE 802.3at layer 1 hardware classification to indicate successful Type 2 PSE detection to the rest of the system.
| Integrated MOSFET rating | 100 V, 0.45 C, 1 A |
|---|---|
| Typical inrush current | 140 mA |
| Maximum duty cycle | 80% |
| Package type | HTSSOP20 |
| Document ID | 16811 Rev 1 |
Yes, it works with power supplied from Ethernet LAN cables or from local auxiliary sources such as wall adapters.
The T2P open drain signal asserts when powered by a PSE performing 2-events classification and is an active low signal.