Poe, Ctlr, 40W, 20Tssop; Poe Standard:Ieee 802.3Af, 802.3At; Poe Controller Type:Pd Controller; Input Voltage:57V; Output Current Max:-; Uvlo:38V; Ic Case/Package:Tssop; No. Of Pins:20Pins; No. Of Channels:1Channels; Power Max:40W Rohs Compliant: Yes |Onsemi NCP1081DER2G

NCP1081DER2G – 40W IEEE 802.3af/at PoE PD Controller – onsemi

Power your network devices reliably with the NCP1081DER2G PoE controller from onsemi. This high-performance Power over Ethernet (PoE) Powered Device (PD) controller simplifies integration and ensures robust power delivery for space-constrained applications. PCX supplies this essential IC with guaranteed quality and rapid shipping to keep your projects on schedule.

Key Features

• Compliance: Supports IEEE 802.3af (PoE) & 802.3at (PoE+) standards
• Power Handling: Up to 40W maximum power delivery
• Voltage Range: Operates from 0V to 57V input
• Temperature Resilience: Industrial-grade -40°C to 85°C operating range
• Integration: Combines PD controller and DC/DC converter functions
• Compact Design: 20-TSSOP-EP exposed pad package for thermal management

Technical Details

This single-channel PoE controller features both internal hotswap and switching FETs, eliminating the need for external MOSFETs. The surface-mount TSSOP package (4.40mm width) includes an exposed thermal pad for efficient heat dissipation in high-density layouts. Its wide operating voltage accommodates fluctuating PoE line conditions while maintaining stable performance across industrial environments.

Common Applications

• IP security cameras and access control systems
• Wireless access points and network switches
• Industrial IoT sensors and automation controllers
• VoIP phones and communication devices
• Medical monitoring equipment

About onsemi

onsemi (ON Semiconductor) is a global leader in power management and sensing technologies, renowned for innovative solutions in automotive, industrial, and cloud-power applications. With over 50 years of semiconductor expertise, they deliver high-reliability components that meet rigorous industry standards for performance and durability.

The company’s commitment to sustainable technologies and robust quality control ensures components like the NCP1081DER2G provide consistent operation in critical systems. onsemi maintains ISO-certified manufacturing processes, guaranteeing component traceability and reliability for design engineers worldwide.

About PoE Controllers

Power over Ethernet controllers manage power delivery across network cables, eliminating separate power supplies for connected devices. As essential PD components, they negotiate power requirements with Power Sourcing Equipment (PSE), provide inrush current protection, and convert input voltage for downstream circuits.

These ICs enable cleaner installations, reduced wiring costs, and centralized power management in network infrastructure. Advanced controllers like the NCP1081DER2G support higher-wattage PoE+ standards while maintaining compatibility with legacy systems, making them ideal for upgrading existing deployments.

Packaging Options

Available in industry-standard Tape & Reel (TR) for automated assembly. Contact PCX for Cut Tape (CT) and other special packaging requirements.

Frequently Asked Questions

Question: Is this controller compatible with both PoE and PoE+ switches?
Answer: Yes, it fully complies with IEEE 802.3af (15.4W) and 802.3at (30W+) standards.

Question: Does this IC require external MOSFETs?
Answer: No, it integrates both hotswap and DC/DC converter switches internally.

Question: What thermal management is recommended?
Answer: The exposed pad (EP) must be soldered to a PCB copper pour for heat dissipation.

Question: Can I use this for new designs despite its obsolete status?
Answer: While marked obsolete by onsemi, it remains available through PCX for legacy support and maintenance.

Question: Is there a development board available?
Answer: Refer to onsemi’s evaluation kit documentation in the datasheet for reference designs.

Question: How does this PoE controller handle voltage fluctuations?
Answer: Its 0-57V operating range includes UVLO (under-voltage lockout) protection at 38V to ensure stable operation.

Note: Product image is representational. Refer to datasheet for exact specifications.

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