The LINK-PP LP41223NL is a high-performance, single-port 10/100 BASE-T magnetic transformer module specifically engineered for next-generation PoE++ (IEEE 802.3bt) applications. Designed to handle increased power demands, this module supports up to 1.1A DC current capability, making it ideal for high-power network devices.

1. Key Features of PoE++ LAN Magnetics

1. PoE++ Ready: Optimized for increased power requirements with a 1.1A DC current capability per port.​
2. Standards Compliant: Fully meets the IEEE 802.3bt specification for high-power Power over Ethernet.
3. Safety Certified: UL recognized under file number E484653.
4. Robust Isolation: High-voltage isolation of 1500Vrms (1 minute) or 1800Vrms (1 second).
5. Eco-Friendly: Lead-free and fully RoHS compliant.
6. Product Type:High-performance Ethernet LAN Transformer designed for increased PoE++ power delivery requirements.
7. Primary Application:Specifically engineered for IEEE 802.3bt (PoE++) systems requiring enhanced DC current handling up to 1.1A.

2. Electrical Specifications @ 25°C

2.1 Turns Ratio

Balanced 1:1 design ensures proper impedance matching between PHY and cable side for 10/100/1000Base-T systems.

2.2 Open Circuit Inductance (OCL)

Test Condition: 100kHz, 0.1Vrms, 28mA DC Bias

Maintains stable low-frequency performance even under DC bias conditions required by PoE++ operation.

2.3 Insertion Loss

Low insertion loss ensures minimal signal attenuation and improved eye diagram margin.

2.4 Return Loss (Minimum)

2.5 Cross Talk

Ensures low electromagnetic interference and stable differential signaling.

2.6 CMRR (Common Mode Rejection Ratio)

Strong suppression of common-mode noise, critical for high-power PoE++ systems.

2.7 Polarity

Pins 1 & 12 and 4 & 9 are in phase.

2.8 Hi-Pot (Primary to Secondary)

• 1500Vrms, 1 minute or
• 1800Vrms, 1 second

Provides reinforced isolation for safety and surge protection.

2.9 PoE++ Current Capability

Designed for increased PoE++ requirements with: 1.1A DC current capability

Supports high-power IEEE 802.3bt applications.

2.10 Operating Temperature

0°C to +70°C:Suitable for commercial and standard industrial environments.

3. LP41223NL PoE++ LAN Transformer Drawing:

Technical Note on Polarity: Pins 1 & 12 and Pins 4 & 9 are in phase to ensure signal integrity across the transformer.

4. Applications of PoE++ Ethernet LAN Transformer

The LP41223NL is versatile and designed to support a wide array of networking applications:

• SOHO Equipment: ADSL modems and home routers.
• Enterprise Networking: LAN-on-Motherboard (LOM) designs.
• Infrastructure: Network Hubs and high-power PoE++ Switches.
• Industrial IoT: Devices requiring high-current power delivery alongside data.