Overview
The LTC4263-1, produced by Analog Devices Inc., is a high power, single Power Sourcing Equipment (PSE) controller designed for use in IEEE 802.3af compliant Power over Ethernet (PoE) systems. This component integrates an onboard power MOSFET, internal inrush current limit, and short-circuit protection, making it suitable for powering high-power devices such as wireless access points (WAPs), security cameras, and RFID readers. The LTC4263-1 simplifies PSE implementation by requiring only a single 48V supply and a minimal number of passive support components, eliminating the need for an external microcontroller.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 48V |
| Output Power | Up to 30W |
| PD Detection | IEEE 802.3af compliant |
| Disconnect Sensing | Selectable AC or DC |
| Current Limit | Configurable based on detected PD class |
| Short-Circuit Protection | Internal |
| Operating Temperature | -40°C to 85°C |
| Package Type | 16-Lead DFN (4mm x 3mm) |
Key Features
- Autonomous operation without the need for a microcontroller
- Internal power MOSFET for driving the PSE port
- IEEE 802.3af compliant PD detection and classification circuitry
- Selectable AC or DC disconnect sensing
- Programmable onboard power management for multi-port systems
- Cable drop compensation and current limit switches
- LED pin for indicating port status and fault detection
- Legacy detect mode for compatibility with non-compliant devices
Applications
- Power over Ethernet (PoE) systems
- Wireless access points (WAPs)
- Security cameras
- RFID readers
- Other high-power PoE devices
Q & A
- What is the primary function of the LTC4263-1? The primary function of the LTC4263-1 is to control the delivery of power to the PSE port in IEEE 802.3af compliant Power over Ethernet systems.
- Does the LTC4263-1 require an external microcontroller? No, the LTC4263-1 operates autonomously without the need for an external microcontroller.
- What is the maximum output power of the LTC4263-1? The LTC4263-1 can provide up to 30W of output power.
- How does the LTC4263-1 detect PDs? The LTC4263-1 uses IEEE 802.3af compliant PD detection circuitry, including signature detection and classification.
- What types of disconnect sensing does the LTC4263-1 support? The LTC4263-1 supports selectable AC or DC disconnect sensing.
- Can the LTC4263-1 handle legacy devices? Yes, the LTC4263-1 has a legacy detect mode to support non-compliant devices.
- How does the LTC4263-1 indicate port status and faults? The LTC4263-1 uses an LED pin to indicate the port status and fault detection.
- What is the operating temperature range of the LTC4263-1? The operating temperature range is -40°C to 85°C.
- What package type is the LTC4263-1 available in? The LTC4263-1 is available in a 16-Lead DFN (4mm x 3mm) package.
- Does the LTC4263-1 support multi-port systems? Yes, the LTC4263-1 supports multi-port systems with programmable onboard power management.
