The NCP1082 is a member of the Power over Ethernet Powered Device (PoE-PD) product family from ON Semiconductor and represents a robust, flexible and highly integrated solution targeting demanding Ethernet applications. It combines in a single unit an enhanced PoE-PD interface fully supporting the IEEE 802.3af specification and a flexible and configurable DC-DC converter controller.
The NCP1082's exceptional capabilities enable applications to smoothly transition from non-PoE to PoE enabled networks by also supporting power from auxiliary sources such as AC power adapters and battery supplies, eliminating the need for a second switching power supply.
ON Semiconductor's unique manufacturing process and design enhancements allow the NCP1082 to deliver up to 13 W of regulated power to support PoE applications according to the IEEE 802.3af standard. This device leverages the significant cost advantages of PoE-enabled systems to a broad spectrum of products in markets such as VoIP phones, wireless LAN access points, security cameras, point of sales terminals, RFID readers, industrial ethernet devices, etc.
The integrated current mode DC-DC controller facilitates isolated and non-isolated fly-back, forward and buck converter topologies. It has all the features necessary for a flexible, robust and highly efficient design including programmable switching frequency, duty cycle up to 80 percent, slope compensation, and soft start-up.
The NCP1082 is fabricated in a robust high voltage process and integrates a rugged vertical N-channel DMOS with a low loss current sense technique suitable for the most demanding environments and capable of withstanding harsh environments such as hot swap and cable ESD events.
The NCP1082 complements the ON Semiconductor ASSP portfolio in communications and industrial devices and can be combined with other high-voltage interfacing devices to offer complete solutions to the communication, industrial and security markets.

• Auxiliary supply support with an input down to 9V DC.
• Improved robustness behavior against cable ESD. The NCP1082 reaches more then 4 kV on HBM and 3 kV for CESD.
• Pin compatibility of the ON PoE-PD portfolio including NCP1080, NCP1081, NCP1082 and NCP1083 in a TSSOP20-EP package.