DESCRIPTION

· The Si3452 is a quad high-voltage port controller designed for PoE and PoE+ PSE applications.

· It integrates high-voltage components, simplifying design and reducing power dissipation.

· The device operates in an industrial temperature range of -40 to 85 °C.

· It comes in a compact, 6×6 mm², 40-pin QFN RoHS-compliant package.

FEATURES

· Supports four PSE power interfaces per controller.

· Programmable current limits for PoE (15.4 W), PoE+ (30 W), and proprietary systems (up to 40 W).

· I2C interface for easy management of 4 to 48 ports without an external MCU.

· Internal low-RON power FETs with current-sense circuitry.

· Integrated transient voltage surge suppressors.

· Proprietary dV/dt disconnect sensing methods.

· Comprehensive fault-protection circuitry including UVLO, current limit, short-circuit protection, and thermal overload protection.

APPLICATIONS

· Power over Ethernet Endpoint switches and Midspans for IEEE Std 802.3af and 802.3at.

· Supports high-power PDs such as Pan/Tilt/Zoom security cameras and 802.11n WAPs.

· Security and RFID systems.

· Industrial automation systems and networked audio.

· IP Phone Systems and iPBXs.

· Metropolitan area networked WAPs, cameras, and sensors.

· WiMAX ASN/BTS and CPE/ODU systems.