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)