LINEAR TECHNOLOGY LTC4271IUF#PBF 芯片, PSE控制器, 12端口, 45-57V, I2C, 24QFN
The is a 12-port Power Sourcing Equipment PSE Controller designed for use in IEEE 802.3 at type 1 and type 2 high power compliant power over Ethernet PoE systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. This chipset delivers lowest-in-industry heat dissipation by utilizing low-RDSON external MOSFETs and 0.25R sense resistors. Advanced power management features include per-port 12‑bit current monitoring ADCs, DAC-programmable current limit and versatile fast shut-down of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a 2 second backoff timer.
频率 1 MHz
电源电压DC 3.00V min
输入电压DC 3.30 V
供电电流 10 mA
针脚数 24
输出功率Max 90 W
工作温度Max 85 ℃
工作温度Min -40 ℃
电源电压 3V ~ 3.6V
输入电压 3.3 V
安装方式 Surface Mount
引脚数 24
封装 QFN-24
高度 0.75 mm
封装 QFN-24
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Each
制造应用 通信与网络, Communications & Networking
RoHS标准 RoHS Compliant
含铅标准 Lead Free
REACH SVHC标准 No SVHC
REACH SVHC版本 2015/12/17
ECCN代码 EAR99
香港进出口证 NLR