PMIC - Power Over Ethernet (PoE) Controllers

Part Number	Description / PDF	Quantity
SI3404-A-GMR Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3462-E01-GMR Silicon Labs	IC POE CNTRL 1 CHANNEL 11QFN	22
SI3402-C-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3402-C-GMR Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	124
SI34062-A-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 24QFN	0
SI3480-A01-GM Silicon Labs	IC POE CNTRL 4/8 PORT 20QFN	0
SI3474B-A01-IM Silicon Labs	OCTAL ETHERNET PORT PSE WITH UP	38
SI3406-A-GMR Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3402-A-GMR Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3452D-B01-GM Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3452C-B02-GMR Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3401-D-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3452B-B02-GM Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3452B-B02-GMR Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3402-A-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3453B-B01-GM Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3400-D-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 20QFN	0
SI3461-E01-GM Silicon Labs	IC POE CNTRL 1 CHANNEL 11QFN	0
SI3453A-B02-GM Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0
SI3453C-B01-GM Silicon Labs	IC POE CNTRL 4 CHANNEL 40QFN	0

PMIC - Power Over Ethernet (PoE) Controllers

1. Overview

Power Over Ethernet (PoE) Controllers are specialized Power Management ICs (PMICs) that enable power delivery and data transmission over Ethernet cables. Defined by IEEE 802.3af/at/bt standards, these controllers manage power negotiation, detection, classification, and protection between Power Sourcing Equipment (PSE) and Powered Devices (PD). Their importance in modern technology lies in simplifying deployment of networked devices by eliminating separate power supplies, enabling applications in IoT, smart buildings, and industrial automation.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
PoE-PSE Controller	Manages power delivery from switches/injectors, supports multi-port management	Network switches, PoE midspans
PoE-PD Controller	Handles power reception in endpoint devices, supports DC-DC conversion	IP cameras, VoIP phones
Integrated Controller	Combines PSE/PD functions with MCU interfaces and protection circuits	Smart sensors, wireless APs

3. Structure and Components

Typical PoE controllers feature: - 16-48 pin QFN/TSSOP packaging - Internal precision sensing amplifiers - Digital control logic for IEEE standard compliance - MOSFET drivers for power switching - Thermal shutdown and OVP/UVP protection modules - I C/SPI interfaces for system integration

4. Key Technical Specifications

Parameter	Importance
Input Voltage Range (36-57V DC)	Ensures compatibility with PoE standards
Output Power Capability (up to 90W)	Determines supported device power class
Efficiency (>80%)	Impacts thermal performance and energy savings
Protection Features	Overcurrent, overtemperature, short-circuit
Communication Protocol Support	LLDP/IEEE 802.3 negotiation compatibility

5. Application Areas

Telecommunications: VoIP phones, fiber modems
Security Systems: PTZ IP cameras, access control readers
Industrial IoT: Wireless sensors, process controllers
Smart Buildings: LED lighting systems, HVAC controls
Networking: Wireless access points, Ethernet extenders

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	TPS23880	8-port PSE controller with energy classification
Analog Devices	LTC4291	Dual-channel PD controller with 90W support
STMicroelectronics	STPSE015	Single-port PSE with automatic power allocation
Microchip	PoE++ Controller	Supports 100W Ultra PoE (UPOE)

7. Selection Recommendations

Match power requirements with IEEE 802.3bt Type 4 classification
Verify backward compatibility with existing network infrastructure
Evaluate protection features for harsh industrial environments
Consider integration level (standalone vs. system-on-chip solutions)
Analyze thermal management requirements for continuous operation

8. Industry Trends

Key development trends include: - Increased adoption of 90W+ PoE for 5G small cells and PTZ cameras - Integration with AI-powered power management systems - Enhanced energy efficiency (>90%) for green computing - Miniaturization for space-constrained applications - Expansion into automotive (PoE for AVB networks) and medical device sectors - Development of intelligent PoE controllers with real-time power monitoring