DESCRIPTION

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

· It supports four PSE power interfaces per controller.

· Features programmable current limits for PoE (15.4 W), PoE+ (30 W), and proprietary systems (up to 40 W) per port.

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

· Designed with mixed-signal IC high-voltage component integration to simplify design and reduce power dissipation.

· Operates in industrial temperature ranges from -40 to 85 °C.

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

FEATURES

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

· Integrated transient voltage surge suppressors.

· Proprietary dV/dt disconnect sensing methods.

· Programmable architecture supports IEEE 802.3af (PoE) and IEEE 802.3at (PoE+).

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

· Supports 1-Event and 2-Event classification algorithms.

APPLICATIONS

· Power over Ethernet endpoint switches and midspans for IEEE Std 802.3af and 802.3at.

· Supports high-power PDs like security cameras, WAPs, and multi-band radios.

· Used in security and RFID systems, industrial automation, and networked audio.

· Suitable for IP Phone Systems, iPBXs, and metropolitan area networked devices.

· Applicable in WiMAX ASN/BTS and CPE/ODU systems.