LTC4270CIUKG

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Power over Ethernet (PoE) controllers are a specialized form of power management integrated circuits (PMICs) that are commonly used to supply power to network devices. The LTC4270CIUKG is a PoE controller IC optimized for applications requiring up to 95 W of power, such as Ethernet switches, wireless access points, routers, cameras, and PoE splitter and midspan products.

The LTC4270CIUKG integrates a number of features necessary for safe and robust power delivery. The IC includes a dedicated 12V to 32V input DC-DC converter, step-up converter, active current sensing and voltage regulation, programmable switching frequency, short-circuit protection and overvoltage protection. The device also features embedded capacitance for output noise reduction and current limiting control.

The LTC4270CIUKG operates in a self-powered or powered-down mode, which allows it to better manage power dissipation during power-down or input transients. The device can also enter a soft-start mode, which limits the inrush current and provides an efficient turn-on ramp-up. In addition, the IC includes an inadequate power warning mechanism that can detect whether the connected load is using too much power and turn off the supply in case of overloading to protect the system.

The LTC4270CIUKG features intelligent management capability, enabling it to monitor and control the power management system. It also provides intelligent diagnostics, data logging, and remote sensing and control capabilities. The IC also supports a variety of communication protocols including I2C, PMBus, and UART.

The LTC4270CIUKG is designed for use with IEEE 802.3 at or af compliant PDs and powered devices (PD and PoE) and is designed to meet the power requirements of the IEEE 802.3bt and Type 2 PDs. The device supports up to four Class 4 PDs with 95 W of total power output, enabling it to quickly and reliably provide power to connected devices. The IC also includes a dedicated analog-to-digital converter (ADC) to measure up to three supply voltages.

The LTC4270CIUKG is also designed to meet a variety of safety requirements and is certified to UL/IEC/EN 60950-1, RoHS, and REACH standards. The device features both overvoltage and overcurrent protection, low EMI, peak current mode control, and thermal compensation to ensure reliable power delivery.

In summary, the LTC4270CIUKG is a sophisticated PoE controller IC designed for use with IEEE 802.3 at or af-compliant PDs and powering devices that requires up to 95 W of power. The device integrates a number of features necessary for safe and robust power delivery, including a dedicated 12V to 32V input DC-DC converter, active current sensing and voltage regulations, programmable switching frequency, and short-circuit protection and overvoltage protection. The device also features intelligent management and diagnostics capabilities, including analog-to-digital converter, I2C, PMBus, and UART communications protocols, overcurrent and overvoltage protection, low EMI, and peak current mode control. The LTC4270CIUKG is certified to a variety of safety standards, providing reliable power delivery in the most demanding applications.

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