NCP1083DER2G

Overview

The NCP1083DER2G is an integrated high-power Power over Ethernet (PoE-PD) interface and DC-DC converter controller manufactured by onsemi. Designed for IEEE 802.3at applications, it combines a Class 4 PoE-PD interface with a flyback DC-DC converter controller featuring a 9V auxiliary supply support. The device operates within a wide input voltage range of 44V to 57V and supports output voltages up to 48V. It utilizes peak current mode control with frequency jittering to reduce EMI. The component is housed in a TSSOP-20 package and is rated for operation across an extended temperature range.

Feature Summary

• Integrated Class 4 PoE-PD interface compliant with IEEE 802.3at standards
• Built-in flyback DC-DC converter controller with 9V auxiliary supply support
• Peak current mode control with frequency jittering for EMI reduction
• Wide operating input voltage range from 44V to 57V

Applications

• High-power PoE-powered devices requiring IEEE 802.3at compliance
• IP cameras and wireless access points with auxiliary power needs
• Industrial IoT gateways and sensors
• Network infrastructure equipment

Procurement Notes

Verify the specific suffix DER2G against the official datasheet to confirm package type and tape/reel specifications. Confirm RoHS compliance status through manufacturer documentation. Check for end-of-life notifications or discontinuance alerts prior to final design approval. Ensure supplier authorization to guarantee component authenticity and traceability.

Selection Notes

Select this component for designs requiring a single-chip solution for both PoE classification and DC-DC conversion. It is suitable for applications needing a dedicated 9V auxiliary rail alongside main outputs. Consider thermal management requirements due to the integration of high-power interfaces. Verify that the TSSOP-20 package fits the PCB layout constraints.

Part Context

The NCP1083 belongs to onsemi's family of integrated PoE-PD controllers. It complements models like the NCP1080 and NCP1081 by adding specific support for a 9V auxiliary supply, making it distinct for higher-power applications. This integration simplifies bill of materials and reduces board space compared to discrete solutions.

Replacement Considerations

Check for direct pin-compatible alternatives within the NCP108x series. Verify functional equivalence if substituting with other IEEE 802.3at controllers. Ensure any replacement supports the required 9V auxiliary output configuration.