Overview
The LTC4292IUJ#PBF, part of the LTC4291-1/LTC4292 chipset, is a 4-port power sourcing equipment (PSE) controller designed by Analog Devices Inc. for use in IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. This chipset is engineered to support a wide range of PoE applications, ensuring compliance with various PoE standards while providing advanced power management and monitoring capabilities.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Main PoE Supply Voltage | AGNDP – VEE | 51 | 53 | 57 | V |
| Undervoltage Lock-Out | AGNDP – VOUTnM | 7 | 8 | 9 | V |
| Detection/Connection Check Current | AGNDP – VOUTnM = 0V | 0.8 | 0.9 | - | mA |
| Detection/Connection Check Voltage | AGNDP – VOUTnM, Open Port | 10.4 | 12 | - | V |
| Min. Valid Signature Resistance | - | 15.5 | 17 | 18.5 | kΩ |
| Max. Valid Signature Resistance | - | 27.5 | 29.7 | 32 | kΩ |
| Package Type | - | - | 40-Lead 6mm × 6mm Plastic QFN | - | - |
| Operating Temperature Range | - | - | -40°C to 85°C | - | - |
Key Features
- Fully compliant with IEEE 802.3bt Type 3 and 4 PSE standards, and supports Type 1, 2, 3, and 4 powered devices (PDs).
- Low power path dissipation per channel with 150mΩ sense resistance and 30mΩ or lower MOSFET RDS(ON).
- Provides electrical isolation, eliminating the need for optos and isolated 3.3V supply.
- High reliability multipoint PD detection and connection check to distinguish single-signature and dual-signature PDs.
- Continuous, dedicated per-port power and current monitoring, along with per-port power policing.
- 1MHz I2C compatible serial control interface and pin or I2C programmable PD power up to 71.3W.
Applications
The LTC4292IUJ#PBF is suitable for a variety of Power over Ethernet (PoE) applications, including but not limited to:
- Network switches and routers
- Wireless access points
- IP phones and video conferencing equipment
- Security cameras and surveillance systems
- Industrial control systems and IoT devices
Q & A
- What is the LTC4292IUJ#PBF used for? The LTC4292IUJ#PBF is a 4-port power sourcing equipment (PSE) controller for IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems.
- What are the key compliance standards for the LTC4292IUJ#PBF? It is fully compliant with IEEE 802.3bt Type 3 and 4 PSE standards and supports Type 1, 2, 3, and 4 powered devices (PDs).
- What is the operating temperature range of the LTC4292IUJ#PBF? The operating temperature range is -40°C to 85°C.
- What package type is the LTC4292IUJ#PBF available in? It is available in a 40-Lead 6mm × 6mm Plastic QFN package.
- Does the LTC4292IUJ#PBF provide electrical isolation? Yes, it provides electrical isolation, eliminating the need for optos and isolated 3.3V supply.
- What is the maximum PD power that can be programmed via the I2C interface? The PD power can be programmed up to 71.3W via the I2C interface.
- Does the LTC4292IUJ#PBF support continuous power and current monitoring? Yes, it supports continuous, dedicated per-port power and current monitoring.
- What is the sense resistance of the LTC4292IUJ#PBF? The sense resistance is 150mΩ.
- Can the LTC4292IUJ#PBF distinguish between single-signature and dual-signature PDs? Yes, it can distinguish between single-signature and dual-signature PDs through its connection check feature.
- What is the typical undervoltage lock-out voltage for the LTC4292IUJ#PBF? The typical undervoltage lock-out voltage is 8V.
