ON Semiconductor NCP1090DBRG: Power over Ethernet Interface Controller

The ON Semiconductor NCP1090DBRG is a robust Power over Ethernet (PoE) interface controller that provides a compact, integrated solution for Powered Devices (PDs) in accordance with the IEEE 802.3af standard. This device simplifies the implementation of PoE functionality in networked devices such as IP cameras, wireless access points, and VoIP phones, enabling them to receive both power and data through a single Ethernet cable.

The NCP1090DBRG is designed to extract power from a conventional twisted pair Category 5 Ethernet cable, complying with the 802.3af standard. The device features an internal signature resistor and class programming capability, allowing it to communicate with Power Sourcing Equipment (PSE) to negotiate the necessary power for the PD. With its integrated isolation power MOSFET and current sense, the NCP1090DBRG ensures safe and reliable power delivery and control.

Key features of the NCP1090DBRG include overtemperature protection, under- and over-voltage lockout, and robust thermal management, making it suitable for a wide range of environmental conditions. The device also supports auxiliary detectors, which enable the use of an external MOSFET to support higher power applications beyond the PoE standard.

The NCP1090DBRG comes in a compact surface-mount package, making it ideal for space-constrained applications. Its integration of multiple functions into a single chip allows for reduced component count, improved reliability, and simplified design for end products. Whether for new designs or upgrading existing ones, the NCP1090DBRG provides an efficient and cost-effective solution for PoE-enabled devices.

With its adherence to industry standards and ON Semiconductor's reputation for quality and performance, the NCP1090DBRG is a top choice for designers looking to incorporate PoE technology into their products. Its ease of use, combined with advanced protection features, ensures that devices not only receive power safely but also maintain stable operation under various conditions.