Description

4-Port IEEE 802.3bt PoE PSE Controller Features: Four PSE Ports Two Power Channels per Port Low Power Path Dissipation per Channel 150mΩ Sense Resistance 30mΩ or Lower MOSFET RDS(ON) Chipset Provides Electrical Isolation Eliminates Optos and Isolated 3.3V Supply Very High Reliability Multipoint PD Detection Connection Check Distinguishes Single-Signature and Dual-Signature PDs Fully Compliant IEEE 802.3bt Type 3 and 4 PSE Compliant Support for Type 1, 2, 3, and 4 PDs Continuous, Dedicated Per-Port Power and Current Monitoring Per-Port Power Policing 1MHz I2C Compatible Serial Control Interface Pin or I2C Programmable PD Power Up to 71.3W Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291-1) QFN Packages