·IEEE 802.3at/af compliant
·Single DC power supply voltage input (45~57V)
·Supplies 4 independent power ports
·Supports DC Load-Removal Detections
·Built-in power FETs
·0.24Ω Current-Sensing Resistor
·Up to 50W per Port for PSE Applications
·Wide temperature range: -40°C ~+85°C
·9-Bit Port Current and Voltage Monitoring
·I2C Bus to access up to 8 x TMI7608 devices
·Independent system parameters setting for every port
·Thermal protection
·Built-in 3.3V regulators for external 🦄devices
·Built-in Power on Reset
·Configurations: 30W x 8ports
·Built-in LEDs control
·Built-in EEPROM interface for dumb application
·Direct or Shift Overload LED
·Pin Selectable Deteꦿction Backoff Timer for ALT_A/B
·2-Event Pin-Select
·Robust Short-Circuit Protection
·Available in QFN7x7-48 Package
The TMI7608 is an 8-port PSE (Power Sourcing &n�🌠�bsp;E🤡quipment) controll𒉰er IC for PoE (Power over Ethernet) systems. It ⛄integrღates power, analog and log꧋ic circuits into a single chip, and can be used for &nbs♐p;Midspan and Endpoint PSE applications. TMI7608 meets🥀 IEEE 802.3af 2003 requirements, such as multi-point resistor detection, PD classifꦰication, DC Disconnect, and back-off for midspan. It als😼o meets all IEEE 802.3at 2009 requirement꧙s, such as two-event classification a💮nd supply maximum 36W per port. The device a𒊎lso supports class 5 for detection and classification of &ꦆnbsp;high-power PDs. The device supports singlesupply ✨operation, provides up 💞to 50W to each port (class 5 enabled). T🃏he 3.3V regulator is built-in♔ to support external devices. Multip🎃le TMI7608 can integrꦓate to build an 8xN ports PSE system, and I2C bus uses to collect PD power status from eachℱ TMI7608 to supp🍃ort global power managements. Management switch host has options to communicate TMI7608 via I2C bus for PSE management activities. Opto-couplers can be implemented to provide electrical isolation between the host and TMI7608 for signal communication.
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