Datasheet Linear Technology LTC4279IS#PBF — 数据表

LTC4279
Single Port PoE/PoE+/
LTPoE++ PSE Controller
FEATURES DESCRIPTION Compliant with IEEE 802.3at Type 1 and 2
nn Supports LTPoE++В® Up to 90W
nn Supports Dual-Signature PDs
nn Fully Autonomous Operation without Microcontroller
nn Very Low Power Dissipation
– 0.1Ω Sense Resistance
– Low RDS(ON) External MOSFET
nn Very High Reliability 4-Point PD Detection
– 2-Point Forced Voltage and Forced Current
nn Robust Short-Circuit Protection
nn Cable Surge Protected В±80V OUT Pin
nn Classification Dependent I
CUT and ILIM Current
Thresholds
nn Supports 2-Pair and 4-Pair Output Power
nn UltraPWR Mode Supports Custom PDs Up to 123W
nn Pin-Selectable Detection Backoff Timer for Midspans
nn Pin Programmable Legacy PD Detection
nn Pin Programmable Maximum Power Mode
nn Status LED Pin …