MAX5969BETB+T

MAXIM INTEGRATED PRODUCTS  MAX5969BETB+T  芯片, 控制器, 以太网供电

The is an IEEE 802.3af/at compliant powered device PD interface controllers with integrated power MOSFET in 10 pin TDFN package. It is a complete interface for powered device PD to comply with IEEE802.3af/at standard in a power over Ethernet PoE system. The MAX5969B provides PD with detection signature, classification signature and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5969B limits current to less than 180mA before switching to higher current limit when isolation power MOSFET is fully enhanced. The device has an input UVLO with wide hysteresis and long deglitch time to compensate for twisted pair cable resistive drop and to assure glitch free transition during power-on/off conditions. It can withstand up to 100V at input. The MAX5969B supports 2-event classification method as specified in IEEE 802.3at standard and provides a signal to indicate when probed by type 2 power sourcing equipment PSE.

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VIN supply voltage of 60V and VIN supply current of 0.27mA

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Operating temperature range from -40°C to 85°C

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Provides power good signal, overtemperature protection and di/dt limit

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Simplified wall adapter interface

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Current limit and foldback

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Input offset current of 10µA

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Maximum classification current of 63.3mA class 5, RCLS = 21.3ohm

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Current limit during normal operation between 720mA and 880mA

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PoE classification 0 to 5

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40V UVLO, VIN turn-on voltage of 38.6V and VIN turn-off voltage of 30V