Skyworks Solutions Inc. Si3472/Si3473 PoE PSE Controllers

Skyworks Solutions Inc. Si3472/Si3473 PoE PSE Controllers are fully programmable, 50V to 57V power sourcing equipment (PSE) controllers. The devices are used for IEEE 802.3bt 2-pair, Type 3 applications. As a 2-pair, Type 3 PSE controllers, Si3473/72 are compatible with IEEE 802.3af and IEEE 802.3at powered device (PD) loads. Designed for use in PSE endspans (switches) and midspans (injectors), the Si3473/72 integrates eight (Si3473) or four (Si3472) independent ports. Each has IEEE-required detection and classification functionality.

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 5mm x 7mm QFN package (Si3472)
56-pin, 8mm x 8mm QFN package (Si3473)

Applications

IEEE 802.3af, 802.3at, and 2-pair 802.3bt Power Sourcing Equipment (PSE)
Power over Ethernet switches
IP phone systems
Smart grid switches

Ruggedized and industrial switches
Multiport PoE injectors
Applications powering IEEE Type 1 and 2 PDs through Class 4 up to 30W
Applications powering legacy 2-pair Class 5 PDs to 45W

Skyworks Solutions Inc. Si3472/Si3473 PoE PSE Controllers

Features

Applications

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