The LTC4263CS#PBF is a 1-channel autonomous PSE Controller with internal switch for use in IEEE 802.3af? compliant power over Ethernet systems. It includes an on board power MOSFET, internal inrush, current limit and short-circuit control, IEEE 802.3af? compliant PD detection and classification circuitry and selectable AC or DC disconnect sensing. Onboard control algorithms provide complete IEEE 802.3af? compliant operation without the need of a microcontroller. The LTC4263 simplifies PSE implementation, needing only a single 48V supply and a small number of passive support components. Programmable on board power management circuitry permits multiple LTC4263s to allocate and share power in multi-port systems, allowing maximum utilization of the 48V power supply, all without the intervention of a host processor. The port current limit can be configured to automatically adjust to the detected PD class. Detection backoff timing is configurable for either Endpoint or Midspan operation.
- Fully autonomous operation without microcontroller
- Internal MOSFET with thermal protection
- Power management works across multiple ports with simple RC network
- Precision inrush control with internal sense resistor
- Powered device (PD) detection and classification
- AC and DC Disconnect sensing
- Robust short-circuit protection
- Pin-selectable detection backoff for Midspan PSEs
- Classification dependent ICUT current threshold
- LED Driver indicates port on and blinks status codes
自动化与过程控制, 安全, 通信与网络
(EN)
