KEY FEATURES

• Octal or Quad Port Power Sourcing

Equipment (PSE) controller

• IEEE 802.3bt 2-pair, Type 3 compliant

• IEEE 802.3af and IEEE 802.3at

compatible

• Autonomous or I2C host interface

• Emergency Shutdown support with port

priority control

• Adds enhanced features for maximum

design flexibility:

• Per-port current and voltage monitoring

• Multi-point detection

• Programmable power MOSFET gate

drive control

• Configurable watchdog timer enables

failsafe operation

• Maskable interrupt pin

• Comprehensive fault protection circuitry

includes:

• Power undervoltage lockout

• Output current limit and short-circuit

protection

• Thermal overload detection

• Extended operating temp range: –40 to

+85 °C

• 38-pin 5 x 7 mm QFN package (Si3472)

• 56-pin, 8 x 8 mm QFN package (Si3473)