NCP1082: Integrated PoE-PD and DC-DC Converter Controller, 13 W, with Auxiliary Supply Support

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.

Features
  • 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.
Benefits
  • Eliminates the need for a second DC-DC converter to support traditional non-PoE power sources which may range down to 9 V.
  • Protects the device against cable transients and hot swap events that can occur in harsh environments and when installed outdoors.
  • Enables customers to easily switch from low to high power platforms with or without Vaux using the same reference design.
Applications
  • Power over Ethernet powered devices
  • Wall wart replacement
  • PoE in combination with wall wart
End Products
  • VoIP phones
  • WLAN access point
  • IP cameras
  • Industrial equipment
  • Point of sale
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP108x SCILAB SCRIPT for Calculating External Components in Flyback DesignNCP108X SCILAB SCRIPT (13.0kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Integrated PoE-PD & DC-DC Converter Controller with 9 V Auxiliary Supply SupportNCP1082/D (214.0kB)3
Application Notes (3)
Document TitleDocument ID/SizeRevisionRevision Date
Calculating External ComponentsAND8332/D (844.0kB)0
Circuit Design and PCB Layout Guidelines for Designs Using the NCP108xAND9133/D (60kB)1Mar, 2015
PoE Auxiliary Supply ApplicationsAND9080/D (104kB)1Mar, 2015
Package Drawings (1)
Document TitleDocument ID/SizeRevision
TSSOP-20 EP, 6.5x4.4948AB (70.4kB)O
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP108x PSpice ModelNCP108X-SPICE (103.0kB)0
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1082DEGActivePb-free Halide freeTSSOP-20948AB2Tube74$0.99
NCP1082DER2GActivePb-free Halide freeTSSOP-20948AB2Tape and Reel2500$0.99
Specifications
ProductTopologyPhasesControl ModeVCC Min (V)VCC Max (V)fSW Typ (kHz)tres Typ (ns)
NCP1082DEGFlyback1Current Mode05725037
NCP1082DER2GFlyback1Current Mode05725037
Integrated PoE-PD & DC-DC Converter Controller with 9 V Auxiliary Supply Support (214.0kB) NCP1082
NCP108x SCILAB SCRIPT for Calculating External Components in Flyback Design NCP1083
Calculating External Components NCP1083
Circuit Design and PCB Layout Guidelines for Designs Using the NCP108x NCP1083
PoE Auxiliary Supply Applications NCP1083
NCP108x PSpice Model NCP1083
TSSOP-20 EP, 6.5x4.4 NCP1083