LTC4266IGW#PBF

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The LTC4266IGW#PBF is a symmetrical power-over-Ethernet (PoE) controller. It is a type of PMIC - Power Over Ethernet (PoE) Controllers and can be used in both powered devices (PDs) and power sourcing equipment (PSEs). It complies with the IEEE 802.3af (PoE) and 802.3at (PoE+) standards. The device integrates an efficient 1.6A/1.4A synchronous buck regulator and 3 Power MOSFETs in a single package.

The LTC4266IGW#PBF controller can be used in various applications, such as home office, VoIP phones, industrial equipment, access points, IP cameras, and networking gear. It is designed to supply power to PDs reliably and securely and features various protection mechanisms, such as feed-forward compensation circuitry, adjustable over-current limit, adjustable max/min output voltage, soft-start and over-temperature protection. The input voltage range of the device is 15V to 57V and the output voltage range is 0.6V to 55V.

The LTC4266IGW#PBF controller provides optoelectronic isolation between the PoE PSE and the CON pin. The CON pin turns off the supply when the device is disabled or when an over-current/over-voltage lockout fault occurs. It has an operating temperature range of -40degreeC to +85degreeC, making it suitable for use in a wide range of applications.

When it comes to the working principle of the LTC4266IGW#PBF controller, it uses the standard IEEE 802.3af/at protocol and the power source voltage is monitored at the PD by the device. It has an on-chip voltage detector, which monitors the ground voltages of the device and compares them to the power source voltage. When the PD is disabled, the device turns off the power MOSFET and the device enters a low-power Standby mode. When the device is enabled, the power MOSFET is enabled, allowing the PD to draw power from the source.

The LTC4266IGW#PBF controller also integrates a current monitor and over-current protection function. It supports adjustable over-voltage, over-current, and short-circuit protection to ensure reliable sourcing of power to the PDs. The device also provides a circuit for automatic detection and disconnection of PDs when the power requirement falls below the IEEE 802.3af/at limit.

The LTC4266IGW#PBF controller offers simple system design and supports high input voltage. It also integrates a digital interface for monitoring system operation, including output voltage, current, temperature, and other fault conditions. In addition, it offers adjustable power-good monitoring and brownout control, which provides additional safety in the PoE system.

The LTC4266IGW#PBF controller is a low-power, highly-integrated and cost-effective device. It is ideal for use in a variety of applications, such as VoIP phones, industrial equipment, access points, IP cameras, and networking gear. This device can provide reliable and secure power solutions, allowing OEMs to realize efficient and cost-effective designs.

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