onsemi NCP1082DEG

The NCP1082 is a member of ON Semiconductor’s Power over Ethernet Powered Device (PoE−PD) product family 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 ON Semiconductor’s 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.

• This is a Pb−Free Device
• Flexible Auxiliary Power Supply Support
• 9 V Front, Rear and Direct Auxiliary Supply Connections
• Fully Supports IEEE 802.3af Standard
• Regulated Power Output up to 13 W
• Programmable Classification Current
• Adjustable Under Voltage Lock Out
• Programmable Inrush Current Limit
• Programmable Operational Current Limit up to 500 mA
• Over−temperature Protection
• Industrial Temperature Range -40°C to 85°C with Full Operation up to 150°C Junction Temperature
• 0.6 Ohm Hot−swap Pass−switch with Low Loss Current Sense Technique
• Vertical N−channel DMOS Pass−switch Offers the Robustness of Discrete MOSFETs with Integrated Temperature Control
• Current Mode Control
• Supports Isolated and Non−isolated DC−DC Converter Applications
• Internal Voltage Regulators
• Wide Duty Cycle Range with Internal Slope Compensation Circuitry
• Programmable Oscillator Frequency
• Programmable Soft−start Time

• VoIP phones
• wireless LAN access points
• security cameras
• point of sales terminals
• RFID readers
• industrial ethernet devices