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Numéro de sérieNCP1081
CategoriePower Management => DC-DC Converters
DescriptionIntegrated 40 W High Power PoE-PD & DC-DC Converter Controller (IEEE 802.3at Draft 3.0)
The NCP1081 is a member of ON Semiconductor\'s high power HIPO™ Power over Ethernet Powered Device (PoE-PD) product family and represents a robust, flexible and highly integrated solution targeting demanding medium and high power Ethernet applications. It combines in a single unit an enhanced PoE-PD interface fully compliant with the IEEE 802.3af and IEEE 802.3at (Draft 3.0) specifications and a flexible and configurable DC-DC converter controller.
SociétéON Semiconductor
DatasheetTélécharger NCP1081 datasheet
  • Description courte
  • NCP1081 Integrated High Power PoE-PD Interface & DC-DC Converter Controller

    The is a member of ON Semiconductor's high power HIPOt Power over Ethernet Powered Device (PoE-PD) product family and represents a robust, flexible and highly integrated solution targeting demanding medium and high power Ethernet applications. It combines in a single unit an enhanced PoE-PD interface supporting the IEEE802.3af and the upcoming draft IEEE802.3at (D3.0) standard TSSOP-20 EP and a flexible and configurable DC-DC converter controller. DE SUFFIX The NCP1081's exceptional capabilities offer new opportunities for CASE 948AB the design of products powered directly over Ethernet lines, eliminating the need for local power adaptors or power supplies and drastically reducing the overall installation and maintenance cost. ON Semiconductor's unique manufacturing process and design enhancements allow the NCP1081 to deliver 25.5 W for the draft IEEE802.3at (D3.0) standard and 40 W for proprietary high power PoE applications. The NCP1081 enables the draft IEEE802.3at (D3.0) and implements a two event physical layer classification. Additional proprietary classification procedures support high power sourcing equipment (PSE) on the market. The unique high power features leverage the significant cost advantages of PoE-enabled systems to a much broader spectrum of products in emerging markets such as industrial ethernet devices, PTZ and Dome NCP1081 = Specific Device Code IP cameras, RFID readers, MIMO WLAN access points, high end XXXX = Date Code VoIP phones, notebooks, etc. Y = Assembly Location The integrated current mode DC-DC controller facilitates isolated ZZ = Traceability Code and non-isolated fly-back, forward and buck converter topologies. It has all the features necessary for a flexible, robust and highly efficient ORDERING INFORMATION design including programmable switching frequency, duty cycle up to See detailed ordering and shipping information in the package 80 percent, slope compensation, and soft start-up. dimensions section on page 2 of this data sheet. The NCP1081 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· Extended power ranges 40 W demanding environments and capable of withstanding harsh· Programmable classification current environments such as hot swap and cable ESD events.· Adjustable under voltage lock out The NCP1081 complements ON Semiconductor's ASSP· Programmable inrush current limit portfolio in industrial devices and can be combined with· Programmable operational current limit 1100 mA stepper motor drivers, CAN bus drivers and other for extended power ranges high-voltage interfacing devices to offer complete solutions to the industrial and security market.· Over-temperature protection· Industrial temperature range to 85°C with full Powered Device Interface operation to 150°C junction temperature· Supporting the IEEE802.3af and the upcoming draft· 0.6 ohm hot-swap pass-switch with low loss current IEEE802.3at (D3.0) standard sense technique· Supports draft IEEE802.3at (D3.0) Two Event Layer 1· Vertical N-channel DMOS pass-switch offers the classification robustness of discrete MOSFETs with integrated· High power Layer 1 classification indicator temperature control

    · Current mode control· Supports isolated and non-isolated DC-DC converter· Internal voltage regulators· Wide duty cycle range with internal slope· Programmable oscillator frequency· Programmable soft-start time

    (Top View) Shipping Configuration 74 units / Tube 2500 / Tape & Reel Temperature Range to 85°C

    For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. VPORTP DETECTION INTERNAL SUPPLY & BANDGAP


    Figure 2 shows the integrated PoE-PD switch and DC-DC controller configured to work in a fully isolated application. The output voltage regulation is accomplished with an external opto-coupler and a shunt regulator (Z1).

    Figure 3 shows the integrated PoE-PD and DC-DC controller configured in a non-isolated fly-back configuration. A compensation network is inserted between the FB and the COMP pin for overall stability of the feedback loop.