High_Power_POE_PD_solution.rar_poe_high_文件格式下载-pudn.com

<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6271a7bed973ef42a4594676/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6271a7bed973ef42a4594676/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">©<span class="_"> </span><span class="ff2 ws1"> Semiconductor Components Industries, LLC, 2008</span></div><div class="t m0 x1 h3 y2 ff3 fs1 fc0 sc0 ls1 ws2">November<span class="_ _0"></span>, 2008 <span class="ff4 ls0 ws0">−</span><span class="ls2 ws3"> Rev<span class="_ _0"></span>. 0</span></div><div class="t m0 x2 h3 y3 ff3 fs1 fc0 sc0 ls0 ws0">1<span class="_ _1"> </span><span class="ff2 ls3">Publication Order Number:</span></div><div class="t m0 x3 h3 y4 ff3 fs1 fc0 sc0 ls0 ws0">NCP1083/D</div><div class="t m0 x4 h3 y5 ff3 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m0 x5 h4 y6 ff5 fs2 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x5 h4 y7 ff5 fs2 fc0 sc0 ls0 ws4">Integrated High Power</div><div class="t m0 x5 h4 y8 ff5 fs2 fc0 sc0 ls0 ws5">PoE-PD <span class="_ _2"></span>Inter<span class="_ _2"></span>face & DC-DC</div><div class="t m0 x5 h4 y9 ff5 fs2 fc0 sc0 ls0 ws6">Conver<span class="_ _2"></span>ter Controller with</div><div class="t m0 x5 h4 ya ff5 fs2 fc0 sc0 ls4 ws7">9<span class="_ _3"></span>V Auxiliar<span class="_ _4"></span>y Supply<span class="_ _2"></span> Suppor<span class="_ _4"></span>t</div><div class="t m0 x5 h5 yb ff3 fs3 fc0 sc0 ls0 ws0">Introduction</div><div class="t m0 x6 h6 yc ff6 fs4 fc0 sc0 ls0 ws8">The NCP1083 is a member of ON Semiconductor<span class="_ _2"></span>’<span class="_ _0"></span>s high power</div><div class="t m0 x5 h6 yd ff6 fs4 fc0 sc0 ls0 ws0">HIPO<span class="ff7">t</span><span class="ws9"> Power over Ethernet Powered <span class="_ _0"></span>Device (PoE<span class="ff8 ws0">−</span><span class="wsa">PD) product</span></span></div><div class="t m0 x5 h6 ye ff6 fs4 fc0 sc0 ls5 wsb">family and represents a robust, flexible and highly integrated solution</div><div class="t m0 x5 h6 yf ff6 fs4 fc0 sc0 ls6 ws0">targeting <span class="ls7">demanding medium and high power Ethernet applications. It</span></div><div class="t m0 x5 h6 y10 ff6 fs4 fc0 sc0 ls0 wsc">combines in a single unit an enhanced PoE<span class="ff8 ws0">−</span>PD interface supporting</div><div class="t m0 x5 h6 y11 ff6 fs4 fc0 sc0 ls0 wsd">the IEEE 802.3af and the upcoming draft IEEE 802.3at (D3.0)</div><div class="t m0 x5 h6 y12 ff6 fs4 fc0 sc0 ls8 wse">standard and <span class="ls9 wsf">a flexible and configurable DC<span class="ff8 ls0 ws0">−<span class="ff6 lsa">DC converter controller<span class="_ _0"></span>.</span></span></span></div><div class="t m0 x6 h6 y13 ff6 fs4 fc0 sc0 ls0 ws10">The NCP1083’<span class="_ _0"></span>s exceptional capabilities enable applications to</div><div class="t m0 x5 h6 y14 ff6 fs4 fc0 sc0 ls0 ws11">smoothly transition from non<span class="ff8 ws0">−</span>PoE to PoE enabled networks by also</div><div class="t m0 x5 h6 y15 ff6 fs4 fc0 sc0 ls0 ws12">supporting power from auxiliary sources such as AC power adapters</div><div class="t m0 x5 h6 y16 ff6 fs4 fc0 sc0 ls0 ws13">and battery supplies, eliminating the need for a second switching</div><div class="t m0 x5 h6 y17 ff6 fs4 fc0 sc0 ls0 ws14">power supply<span class="_ _0"></span>.</div><div class="t m0 x6 h6 y18 ff6 fs4 fc0 sc0 lsb ws15">ON Semiconductor<span class="_ _2"></span>’<span class="_ _0"></span>s unique manufacturing process and design</div><div class="t m0 x5 h6 y19 ff6 fs4 fc0 sc0 ls0 ws0">enhancements <span class="lsc">allow the NCP1083 to deliver up to 25.5 W for the draft</span></div><div class="t m0 x5 h6 y1a ff6 fs4 fc0 sc0 ls0 ws16">IEEE 802.3at <span class="_ _2"></span>(D3.0) standard and up to 40 W for proprietary high</div><div class="t m0 x5 h6 y1b ff6 fs4 fc0 sc0 lsd ws0">power <span class="lse">PoE applications. The NCP1083 enables the draft IEEE 802.3at</span></div><div class="t m0 x5 h6 y1c ff6 fs4 fc0 sc0 ls0 ws17">(D3.0) and implements a two event physical layer classification.</div><div class="t m0 x5 h6 y1d ff6 fs4 fc0 sc0 ls0 ws18">Additional proprietary classification procedures support high power</div><div class="t m0 x5 h6 y1e ff6 fs4 fc0 sc0 ls0 ws19">power sourcing equipment (PSE) on the market. The unique high</div><div class="t m0 x5 h6 y1f ff6 fs4 fc0 sc0 ls0 ws1a">power features leverage the significant cost advantages of PoE<span class="ff8 ws0">−</span></div><div class="t m0 x5 h6 y20 ff6 fs4 fc0 sc0 lsf ws1b">enabled systems to a much broader spectrum of products in emerging</div><div class="t m0 x5 h6 y21 ff6 fs4 fc0 sc0 ls0 ws1c">markets such as industrial ethernet devices, PTZ and Dome IP</div><div class="t m0 x5 h6 y22 ff6 fs4 fc0 sc0 ls10 ws1b">cameras, RFID readers, MIMO WLAN access points, high<span class="ff8 ls0 ws0">−</span><span class="ls11 ws1d">end V<span class="_ _5"></span>oIP</span></div><div class="t m0 x5 h6 y23 ff6 fs4 fc0 sc0 ls0 ws1e">phones, notebooks, etc.</div><div class="t m0 x6 h6 y24 ff6 fs4 fc0 sc0 ls12 ws1f">The<span class="_ _2"></span> integrated current mode DC<span class="ff8 ls0 ws0">−<span class="ff6 ls13">DC controller facilitates</span></span></div><div class="t m0 x5 h6 y25 ff6 fs4 fc0 sc0 ls14 ws20">isolated and non<span class="ff8 ls0 ws0">−<span class="ff6 ws21">isolated fly</span>−<span class="ff6 ws21">back, forward and buck</span></span></div><div class="t m0 x5 h6 y26 ff6 fs4 fc0 sc0 ls0 ws22">converter topologies. It has all the features necessary for a</div><div class="t m0 x5 h6 y27 ff6 fs4 fc0 sc0 ls0 ws23">flexible, robust and highly efficient design including</div><div class="t m0 x5 h6 y28 ff6 fs4 fc0 sc0 ls0 ws24">programmable switching frequency<span class="_ _0"></span>, duty cycle up to 80</div><div class="t m0 x5 h6 y29 ff6 fs4 fc0 sc0 ls15 wsb">percent, slope compensation, and soft start<span class="ff8 ls0 ws0">−<span class="ff6 ls16">up.</span></span></div><div class="t m0 x6 h6 y2a ff6 fs4 fc0 sc0 ls0 ws25">The NCP1083 is fabricated in a robust high voltage</div><div class="t m0 x5 h6 y2b ff6 fs4 fc0 sc0 ls17 ws26">process and integrates a rugged vertical N<span class="ff8 ls0 ws0">−<span class="ff6 ls18">channel DMOS</span></span></div><div class="t m0 x5 h6 y2c ff6 fs4 fc0 sc0 ls16 ws27">with a <span class="ls19 ws0">low loss current sense technique suitable for the most</span></div><div class="t m0 x5 h6 y2d ff6 fs4 fc0 sc0 ls0 ws0">demanding <span class="ls1a">environments and capable of withstanding harsh</span></div><div class="t m0 x5 h6 y2e ff6 fs4 fc0 sc0 ls1b ws28">environments such as hot swap and cable ESD events.</div><div class="t m0 x6 h6 y2f ff6 fs4 fc0 sc0 ls1c ws0">The NCP1083 complements ON Semiconductor<span class="_ _2"></span>’<span class="_ _0"></span>s<span class="ls1d"> ASSP</span></div><div class="t m0 x5 h6 y30 ff6 fs4 fc0 sc0 ls0 ws29">portfolio in industrial devices and can be combined with</div><div class="t m0 x5 h6 y31 ff6 fs4 fc0 sc0 ls1b ws2a">stepper motor drivers, CAN bus drivers and other high<span class="ff8 ls0 ws0">−</span></div><div class="t m0 x5 h6 y32 ff6 fs4 fc0 sc0 ls0 ws0">voltage <span class="ls1e ws1b">interfacing devices to <span class="_ _0"></span>of<span class="_ _0"></span>fer complete solutions to the</span></div><div class="t m0 x5 h6 y33 ff6 fs4 fc0 sc0 ls1b ws2b">industrial and security market.</div><div class="t m0 x5 h5 y34 ff3 fs3 fc0 sc0 ls0 ws0">Features</div><div class="t m0 x5 h5 y35 ff3 fs3 fc0 sc0 ls0 ws2c">Powered Device Interface</div><div class="t m0 x5 h7 y36 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws2d">Flexible Auxiliary Power Supply Support</span></div><div class="t m0 x5 h7 y37 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls1f ws2e">9 V<span class="_ _2"></span> Front,<span class="_ _2"></span> Rear<span class="_ _2"></span> and Direct<span class="_ _2"></span> <span class="ls20 ws2f">Auxiliary<span class="_ _2"></span> Supply<span class="_ _2"></span> Connections</span></span></div><div class="t m0 x7 h7 y38 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws30">Supporting the IEEE 802.3af and the Upcoming Draft</span></div><div class="t m0 x8 h6 y39 ff6 fs4 fc0 sc0 ls0 ws31">IEEE 802.3at (D3.0) Standard</div><div class="t m0 x7 h7 y3a ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws30">Supports Draft IEEE 802.3at (D3.0) T<span class="_ _7"></span>wo Event Layer <span class="_ _0"></span>1</span></div><div class="t m0 x8 h6 y3b ff6 fs4 fc0 sc0 ls0 ws0">Classification</div><div class="t m0 x7 h7 y3c ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws32">High Power Layer 1 Classification Indicator</span></div><div class="t m0 x7 h7 y3d ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws33">Extended Power Ranges up to 40 W</span></div><div class="t m0 x7 h7 y3e ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws34">Programmable Classification Current</span></div><div class="t m0 x7 h7 y3f ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws35">Adjustable Under V<span class="_ _5"></span>oltage Lock Out</span></div><div class="t m0 x7 h7 y40 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws30">Programmable Inrush Current Limit</span></div><div class="t m0 x7 h7 y41 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws36">Programmable Operational Current Limit up to</span></div><div class="t m0 x8 h6 y42 ff6 fs4 fc0 sc0 ls0 ws37">1<span class="_ _0"></span>100<span class="_"> </span>mA for Extended Power Ranges</div><div class="t m0 x7 h7 y43 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls21">Over<span class="ff8 ls0">−</span>temperature Protection</span></div><div class="t m0 x7 h7 y44 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls10 ws38">Industrial T<span class="_ _7"></span>emperature Range <span class="ff8 ls0 ws0">−<span class="ff6 ls5">40</span><span class="ff1">°<span class="ff6 ws39">C to 85</span>°<span class="ff6 lsf">C with Full</span></span></span></span></div><div class="t m0 x8 h6 y45 ff6 fs4 fc0 sc0 ls0 ws3a">Operation up to 150<span class="ff1 ws0">°</span><span class="ws3b">C Junction T<span class="_ _7"></span>emperature</span></div><div class="t m0 x7 h7 y46 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4">0.6 <span class="ff9">W</span><span class="ls22"> Hot</span><span class="ff8">−</span><span class="ls22">Swap Pass</span><span class="ff8">−</span><span class="ls22">switch with Low Loss Current</span></span></div><div class="t m0 x8 h6 y47 ff6 fs4 fc0 sc0 lsb ws1b">Sense T<span class="_ _7"></span>echnique</div><div class="t m0 x7 h7 y48 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls23">V<span class="_ _7"></span>ertical N<span class="ff8 ls0">−</span>channel DMOS Pass<span class="ff8 ls0">−</span><span class="ls24 ws3c">switch Of<span class="_ _0"></span>fers the</span></span></div><div class="t m0 x8 h6 y49 ff6 fs4 fc0 sc0 ls25 wsb">Robustness of Discrete MOSFET<span class="_ _7"></span>s <span class="_ _2"></span>with Integrated</div><div class="t m0 x8 h6 y4a ff6 fs4 fc0 sc0 ls0 ws3d">T<span class="_ _7"></span>emperature Control</div><div class="t m0 x9 h5 y4b ff3 fs3 fc0 sc0 ls0 ws0">http://onsemi.com</div><div class="t m0 xa h3 y4c ff2 fs1 fc0 sc0 ls0 ws3e">NCP1083 = Specific Device Code</div><div class="t m0 xa h3 y4d ff2 fs1 fc0 sc0 ls26 ws3f">XXXX<span class="_ _8"> </span>= Date Code</div><div class="t m0 xa h3 y4e ff2 fs1 fc0 sc0 ls0 ws40">Y<span class="_ _9"> </span>= Assembly Location</div><div class="t m0 xa h3 y4f ff2 fs1 fc0 sc0 ls0 ws41">ZZ<span class="_ _a"> </span>= Traceability Code</div><div class="t m0 xb h3 y50 ff3 fs1 fc0 sc0 ls27 ws0">TSSOP<span class="ff4 ls0">−</span>20 EP</div><div class="t m0 xc h3 y51 ff3 fs1 fc0 sc0 ls5 ws0">DE SUFFIX</div><div class="t m0 xd h3 y52 ff3 fs1 fc0 sc0 ls28 ws0">CASE 948AB</div><div class="t m0 xe h8 y53 ff2 fs6 fc0 sc0 ls29 ws0">Se<span class="_ _2"></span>e detailed ordering and shipping information in the package</div><div class="t m0 xe h8 y54 ff2 fs6 fc0 sc0 ls2a ws42">dimensions<span class="_ _0"></span> sect<span class="ls2b ws0">ion on page 2 of this data sheet.</span></div><div class="t m0 xf h5 y55 ff3 fs3 fc0 sc0 ls2c ws43">ORDERING INFORMA<span class="_ _0"></span>TION</div><div class="t m0 x10 h3 y56 ff2 fs1 fc0 sc0 ls0 ws0">1</div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6271a7bed973ef42a4594676/bg2.jpg"><div class="t m0 x11 h9 y57 ff3 fs5 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x12 h5 y58 ff3 fs3 fc0 sc0 ls0 ws0">http://onsemi.com</div><div class="t m0 x2 h3 y59 ff3 fs1 fc0 sc0 ls0 ws0">2</div><div class="t m0 x5 h5 y5a ff3 fs3 fc0 sc0 ls2d ws0">DC<span class="ff4 ls0">−</span>DC Converter Controller</div><div class="t m0 x5 h7 y5b ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws44">Current Mode Control</span></div><div class="t m0 x5 h7 y5c ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls2e">Supports Isolated and Non<span class="ff8 ls0">−</span>isolated DC<span class="ff8 ls0">−</span>DC Converter</span></div><div class="t m0 x13 h6 y5d ff6 fs4 fc0 sc0 ls0 ws0">Applications</div><div class="t m0 x5 h7 y5e ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws45">Internal V<span class="_ _5"></span>oltage Regulators</span></div><div class="t m0 x5 h7 y5f ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws46">W<span class="_ _0"></span>ide Duty Cycle Range with Internal Slope</span></div><div class="t m0 x13 h6 y60 ff6 fs4 fc0 sc0 ls0 ws44">Compensation Circuitry</div><div class="t m0 x5 h7 y61 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ws47">Programmable Oscillator Frequency</span></div><div class="t m0 x5 h7 y62 ff1 fs5 fc0 sc0 ls0 ws0">•<span class="_ _6"> </span><span class="ff6 fs4 ls11">Programmable Soft<span class="ff8 ls0">−</span><span class="ls2f ws26">start T<span class="_ _0"></span>ime</span></span></div><div class="t m0 x14 h3 y63 ff2 fs1 fc0 sc0 ls30 ws48">(T<span class="_ _7"></span>op View)</div><div class="t m0 x15 h5 y64 ff3 fs3 fc0 sc0 ls31 ws0">PIN DIAGRAM</div><div class="t m0 x16 h3 y65 ff2 fs1 fc0 sc0 ls0 ws0">Exposed</div><div class="t m0 x17 h3 y66 ff2 fs1 fc0 sc0 ls0 ws0">Pad</div><div class="t m0 x18 h3 y67 ff2 fs1 fc0 sc0 ls0 ws0">1</div><div class="t m0 x19 h3 y68 ff2 fs1 fc0 sc0 ls0 ws0">SS</div><div class="t m0 x19 h3 y69 ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x19 h3 y6a ff2 fs1 fc0 sc0 ls0 ws0">COMP</div><div class="t m0 x19 h3 y6b ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x19 h3 y65 ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x19 h3 y6c ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 x19 h3 y6d ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x19 h3 y6e ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x19 h3 y6f ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x19 h3 y70 ff2 fs1 fc0 sc0 ls0 ws0">OSC</div><div class="t m0 x1a h3 y68 ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x1b h3 y69 ff2 fs1 fc0 sc0 ls0 ws0">CLAS<span class="_ _0"></span>S</div><div class="t m0 x1c h3 y6a ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x1d h3 y6b ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x1e h3 y65 ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x1f h3 y6c ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1</div><div class="t m0 xe h3 y6d ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x1f h3 y6e ff2 fs1 fc0 sc0 ls0 ws0">VPORTN2</div><div class="t m0 xe h3 y6f ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x1e h3 y70 ff2 fs1 fc0 sc0 ls0 ws0">TEST</div><div class="t m0 x20 h5 y71 ff3 fs3 fc0 sc0 ls0 ws49">Ordering Information</div><div class="t m0 x21 h3 y72 ff3 fs1 fc0 sc0 ls0 ws4a">Part Number<span class="_ _b"> </span><span class="ws0">Package</span></div><div class="t m0 x22 h3 y73 ff3 fs1 fc0 sc0 ls0 ws4b">Shipping Configuration</div><div class="t m0 x23 ha y74 ff3 fs7 fc0 sc0 ls0 ws0">†</div><div class="t m0 x24 h3 y72 ff3 fs1 fc0 sc0 ls0 ws4c">T<span class="_ _0"></span>emperature Range</div><div class="t m0 x25 h3 y75 ff2 fs1 fc0 sc0 ls0 ws0">NCP1083DEG<span class="_ _c"> </span><span class="ls27">TSSOP</span><span class="ffa">−</span><span class="ls27">20 EP</span></div><div class="t m0 x26 h3 y76 ff2 fs1 fc0 sc0 ls0 ws0">(Pb<span class="ffa">−</span>Free)</div><div class="t m0 x27 h3 y75 ff2 fs1 fc0 sc0 ls0 ws4b">74 units / Tube<span class="_ _d"> </span><span class="ffa ws0">−<span class="ff2">40<span class="ff1">°<span class="_ _0"></span><span class="ff2 ws48">C to 85<span class="ff1 ws0">°<span class="ff2">C</span></span></span></span></span></span></div><div class="t m0 x25 h3 y77 ff2 fs1 fc0 sc0 ls0 ws0">NCP1083DER2G<span class="_ _e"> </span><span class="ls27">TSSOP</span><span class="ffa">−</span><span class="ls27">20 EP</span></div><div class="t m0 x26 h3 y78 ff2 fs1 fc0 sc0 ls0 ws0">(Pb<span class="ffa">−</span>Free)</div><div class="t m0 x28 h3 y77 ff2 fs1 fc0 sc0 ls0 ws4d">2500 / T<span class="_ _7"></span>ape & Reel<span class="_ _f"> </span><span class="ffa ws0">−<span class="ff2">40<span class="ff1">°<span class="_ _0"></span><span class="ff2 ws48">C to 85<span class="ff1 ws0">°<span class="ff2">C</span></span></span></span></span></span></div><div class="t m0 x5 h3 y79 ff2 fs1 fc0 sc0 ls0 ws4e">†<span class="_ _2"></span>For information on tape and reel specifications, including part orientation and tape sizes, please refer to our T<span class="_ _7"></span>ape and Reel <span class="ws0">Packaging</span></div><div class="t m0 x29 h3 y7a ff2 fs1 fc0 sc0 ls33 ws1f">Specification Brochure, BRD801<span class="_ _0"></span>1/D.</div><div class="t m0 x2a h3 y7b ff2 fs1 fc0 sc0 ls0 ws0">INTERNAL</div><div class="t m0 x2b h3 y7c ff2 fs1 fc0 sc0 ls0 ws0">SUPPL<span class="_ _7"></span>Y</div><div class="t m0 x2c h3 y7d ff2 fs1 fc0 sc0 ls0 ws0">&</div><div class="t m0 x2a h3 y7e ff2 fs1 fc0 sc0 ls0 ws0">BANDGAP</div><div class="t m0 x2d h3 y7f ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x2e h3 y80 ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x2f h3 y81 ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x30 h3 y82 ff2 fs1 fc0 sc0 ls0 ws0">CLASSIFICA<span class="_ _7"></span>TION</div><div class="t m0 x31 h3 y7b ff2 fs1 fc0 sc0 ls0 ws0">DETECTION</div><div class="t m0 x32 h3 y83 ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1,2</div><div class="t m0 x33 h3 y84 ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x4 h3 y85 ff2 fs1 fc0 sc0 ls0 ws0">CLASS</div><div class="t m0 x34 h3 y86 ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x35 h3 y87 ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x36 h3 y88 ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x36 h3 y89 ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x37 h3 y8a ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x38 h3 y7f ff2 fs1 fc0 sc0 ls0 ws0">THERMAL</div><div class="t m0 x39 h3 y8b ff2 fs1 fc0 sc0 ls0 ws0">SHUT</div><div class="t m0 x27 h3 y8c ff2 fs1 fc0 sc0 ls0 ws0">DOWN</div><div class="t m0 x2a h3 y8d ff2 fs1 fc0 sc0 ls34 ws4f">HOT SW<span class="_ _0"></span>AP SWITCH</div><div class="t m0 x3a h3 y8e ff2 fs1 fc0 sc0 ls35 ws50">CONTROL & CURRENT</div><div class="t m0 x3b h3 y8f ff2 fs1 fc0 sc0 ls24 ws51">LIMIT<span class="_ _0"></span> BLOCKS</div><div class="t m0 x3c h3 y90 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x3d h3 y91 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x3e h3 y92 ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x3e h3 y45 ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x3f h3 y93 ff2 fs1 fc0 sc0 ls36 ws0">1.2 V</div><div class="t m0 x40 h3 y94 ff2 fs1 fc0 sc0 ls0 ws0">DC<span class="ffa">−</span>DC</div><div class="t m0 x1e h3 y95 ff2 fs1 fc0 sc0 ls0 ws0">CONVER<span class="_ _0"></span>TER</div><div class="t m0 x41 h3 y96 ff2 fs1 fc0 sc0 ls0 ws0">CONTROL</div><div class="t m0 x42 h3 y97 ff2 fs1 fc0 sc0 ls0 ws0">OSC</div><div class="t m0 x37 h3 y98 ff2 fs1 fc0 sc0 ls0 ws0">SS</div><div class="t m0 x36 h3 y99 ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x37 h3 y9a ff2 fs1 fc0 sc0 ls0 ws0">COMP</div><div class="t m0 x37 h3 y9b ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x37 h3 y9c ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 x16 h3 y9d ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x43 h3 y9e ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x44 h3 y9f ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x45 h3 ya0 ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x45 h3 ya1 ff2 fs1 fc0 sc0 ls37 ws0">5 K</div><div class="t m0 x37 h3 y3d ff2 fs1 fc0 sc0 ls0 ws0">OSC</div><div class="t m0 x2a h3 ya2 ff2 fs1 fc0 sc0 ls38 ws0"> VPORT</div><div class="t m0 x2a h3 ya3 ff2 fs1 fc0 sc0 ls17 ws2"> MONITOR</div><div class="t m0 x2d h3 ya4 ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x2b h5 ya5 ff3 fs3 fc0 sc0 ls0 ws52">Figure 1. NCP1083 Block Diagram</div><div class="t m0 x46 h3 ya6 ff2 fs1 fc0 sc0 ls2 ws0">5 <span class="ff9 ls0">m<span class="ff2">A</span></span></div><div class="t m0 x47 h3 ya7 ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x48 h3 ya8 ff2 fs1 fc0 sc0 ls0 ws0">DETECTION</div><div class="t m0 x49 h3 ya9 ff2 fs1 fc0 sc0 ls0 ws0">AUXILIAR<span class="_ _0"></span>Y</div><div class="t m0 x2f h3 yaa ff2 fs1 fc0 sc0 ls0 ws0">SUPPL<span class="_ _7"></span>Y</div><div class="t m0 x10 h3 yab ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x4a h3 yac ff2 fs1 fc0 sc0 ls0 ws0">20 <span class="ff9">m</span>A</div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>

<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6271a7bed973ef42a4594676/bg3.jpg"><div class="t m0 x11 h9 y57 ff3 fs5 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x12 h5 y58 ff3 fs3 fc0 sc0 ls0 ws0">http://onsemi.com</div><div class="t m0 x2 h3 y59 ff3 fs1 fc0 sc0 ls0 ws0">3</div><div class="t m0 x4b hb yad ff3 fs4 fc0 sc0 ls2f ws53">Simplified Application Diagrams</div><div class="t m0 x3c h5 yae ff3 fs3 fc0 sc0 ls0 ws54">Figure 2. Isolated Fly<span class="ff4 ws0">−</span>back Converter with Rear Auxiliary Supply</div><div class="t m0 x4c h3 yaf ff3 fs1 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x9 h3 yb0 ff2 fs1 fc0 sc0 ls0 ws0">Rcs</div><div class="t m0 x4d h3 yb1 ff2 fs1 fc0 sc0 ls0 ws0">Cvddl</div><div class="t m0 x4e h3 yb2 ff2 fs1 fc0 sc0 ls0 ws0">Cvddh</div><div class="t m0 x9 h3 yb3 ff2 fs1 fc0 sc0 ls0 ws0">Cpd</div><div class="t m0 x4f h3 yb4 ff2 fs1 fc0 sc0 ls0 ws0">Css</div><div class="t m0 x50 h3 yb5 ff2 fs1 fc0 sc0 ls0 ws0">Rosc</div><div class="t m0 x51 h3 yb6 ff2 fs1 fc0 sc0 ls0 ws0">M1</div><div class="t m0 x52 h3 yb7 ff2 fs1 fc0 sc0 ls0 ws0">T1</div><div class="t m0 x53 h3 yb8 ff2 fs1 fc0 sc0 ls0 ws0">Cload</div><div class="t m0 x54 h3 yb9 ff2 fs1 fc0 sc0 ls0 ws0">LD1</div><div class="t m0 x4a h3 yba ff2 fs1 fc0 sc0 ls0 ws0">Rd1</div><div class="t m0 x55 h3 ybb ff2 fs1 fc0 sc0 ls0 ws0">Rclass</div><div class="t m0 x56 h3 yba ff2 fs1 fc0 sc0 ls0 ws0">Rilim1</div><div class="t m0 x57 h3 y6c ff2 fs1 fc0 sc0 ls0 ws0">Rinrush</div><div class="t m0 x58 h3 ybc ff2 fs1 fc0 sc0 ls0 ws0">Optocoupler</div><div class="t m0 x59 h3 ybd ff2 fs1 fc0 sc0 ls0 ws0">R3</div><div class="t m0 x59 h3 ybe ff2 fs1 fc0 sc0 ls0 ws0">R4</div><div class="t m0 x5a h3 yc ff2 fs1 fc0 sc0 ls0 ws0">R5</div><div class="t m0 x5b h3 ybf ff2 fs1 fc0 sc0 ls0 ws0">C1</div><div class="t m0 x5c h3 yc0 ff2 fs1 fc0 sc0 ls0 ws0">Z1</div><div class="t m0 xa h3 yc1 ff2 fs1 fc0 sc0 ls0 ws0">Rslope</div><div class="t m0 x5d h3 yc2 ff2 fs1 fc0 sc0 ls0 ws0">C2</div><div class="t m0 x5e h3 yc3 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>output</div><div class="t m0 x5f h3 yc4 ff2 fs1 fc0 sc0 ls0 ws0">D1</div><div class="t m0 x60 h3 yc5 ff2 fs1 fc0 sc0 ls0 ws0">OC1</div><div class="t m0 x1c h3 yc6 ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 xe h3 yc7 ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x40 h3 yc8 ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x61 h3 yc9 ff2 fs1 fc0 sc0 ls0 ws0">VPORTN2</div><div class="t m0 x62 h3 yca ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x1c h3 ycb ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x61 h3 ycc ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1</div><div class="t m0 x63 h3 ycd ff2 fs1 fc0 sc0 ls0 ws0">CLASS</div><div class="t m0 x1c h3 yce ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x63 h3 ycf ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x61 h3 yd0 ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x61 h3 yd1 ff2 fs1 fc0 sc0 ls0 ws0">TEST</div><div class="t m0 x61 h3 yd2 ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x61 h3 yd3 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x40 h3 yd4 ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x63 h3 yd5 ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x20 h3 yd6 ff2 fs1 fc0 sc0 ls0 ws0">Data</div><div class="t m0 x1 h3 yd7 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x5 h3 yd8 ff2 fs1 fc0 sc0 ls0 ws0">Spare</div><div class="t m0 x1 h3 yd9 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x64 h3 yda ff2 fs1 fc0 sc0 ls0 ws0">R1</div><div class="t m0 x65 h3 ydb ff2 fs1 fc0 sc0 ls0 ws0">R2</div><div class="t m0 x66 h3 ydc ff2 fs1 fc0 sc0 ls0 ws0">RJ<span class="ffa">−</span>45</div><div class="t m0 x67 h3 ydd ff2 fs1 fc0 sc0 ls0 ws0">DB1</div><div class="t m0 x68 h3 yde ff2 fs1 fc0 sc0 ls0 ws0">DB2</div><div class="t m0 x69 h3 ydf ff2 fs1 fc0 sc0 ls0 ws0">Raux1</div><div class="t m0 x6a h3 ye0 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(+)</div><div class="t m0 x6a h3 ye1 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(<span class="ffa">−</span>)</div><div class="t m0 x30 h3 ye2 ff2 fs1 fc0 sc0 ls0 ws0">Raux2</div><div class="t m0 x6b h3 ye3 ff2 fs1 fc0 sc0 ls0 ws0">Raux3</div><div class="t m0 x6c h3 ye4 ff2 fs1 fc0 sc0 ls0 ws0">D2</div><div class="t m0 x6d h3 ye5 ff2 fs1 fc0 sc0 ls0 ws0">D3</div><div class="t m0 x6e h3 ye6 ff2 fs1 fc0 sc0 ls0 ws0">Cline</div><div class="t m0 x6f h3 yd9 ff2 fs1 fc0 sc0 ls0 ws0">Z_line</div><div class="t m0 x1e h3 ye7 ff2 fs1 fc0 sc0 ls0 ws0">COMP<span class="_ _10"></span>SS<span class="_ _11"> </span>OSC</div><div class="t m0 x70 h3 ye8 ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x6 h6 ye9 ff6 fs4 fc0 sc0 ls39 ws55">Figure 2 <span class="_ _4"></span><span class="ls3a ws56">shows the integrated PoE<span class="ff8 ls0 ws0">−<span class="ff6 ls3b">PD switch and DC</span>−<span class="_ _0"></span><span class="ff6 ls3b">DC controller configured to work in a fully isolated application. The</span></span></span></div><div class="t m0 x5 h6 yea ff6 fs4 fc0 sc0 ls0 ws57">output voltage regulation is accomplished with an external opto<span class="ff8 ws0">−</span>coupler and a shunt regulator (Z1).</div><div class="t m0 x48 h5 yeb ff3 fs3 fc0 sc0 ls0 ws58">Figure 3. Non<span class="ff4 ws0">−</span>Isolated Fly<span class="ff4 ws0">−</span>back Converter with Rear Auxiliary Supply</div><div class="t m0 x50 h3 yec ff3 fs1 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x71 h3 yed ff2 fs1 fc0 sc0 ls0 ws0">Rcs</div><div class="t m0 x72 h3 yee ff2 fs1 fc0 sc0 ls0 ws0">Cvddl</div><div class="t m0 x73 h3 yef ff2 fs1 fc0 sc0 ls0 ws0">Cvddh</div><div class="t m0 x74 h3 yf0 ff2 fs1 fc0 sc0 ls0 ws0">Cpd</div><div class="t m0 x4f h3 yf1 ff2 fs1 fc0 sc0 ls0 ws0">Css</div><div class="t m0 x50 h3 yf2 ff2 fs1 fc0 sc0 ls0 ws0">Rosc</div><div class="t m0 x71 h3 yf3 ff2 fs1 fc0 sc0 ls0 ws0">M1</div><div class="t m0 x75 h3 ya7 ff2 fs1 fc0 sc0 ls0 ws0">T1</div><div class="t m0 x76 h3 yf4 ff2 fs1 fc0 sc0 ls0 ws0">Cload</div><div class="t m0 x77 h3 yf5 ff2 fs1 fc0 sc0 ls0 ws0">LD1</div><div class="t m0 x54 h3 yf6 ff2 fs1 fc0 sc0 ls0 ws0">Rd1</div><div class="t m0 x78 h3 yf7 ff2 fs1 fc0 sc0 ls0 ws0">Rclass</div><div class="t m0 x79 h3 yf8 ff2 fs1 fc0 sc0 ls0 ws0">Rilim1</div><div class="t m0 x55 h3 yf9 ff2 fs1 fc0 sc0 ls0 ws0">Rinrush</div><div class="t m0 x16 h3 yfa ff2 fs1 fc0 sc0 ls0 ws0">Rslope</div><div class="t m0 x7a h3 yfb ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>output</div><div class="t m0 x60 h3 yfc ff2 fs1 fc0 sc0 ls0 ws0">D1</div><div class="t m0 x1e h3 yfd ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 x41 h3 y99 ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x7b h3 yfe ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x63 h3 yff ff2 fs1 fc0 sc0 ls0 ws0">VPORTN2</div><div class="t m0 x1c h3 y100 ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x1e h3 y101 ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x63 h3 y102 ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1</div><div class="t m0 x2 h3 y103 ff2 fs1 fc0 sc0 ls0 ws0">CLASS</div><div class="t m0 x7c h3 y104 ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x2 h3 y105 ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x63 h3 y106 ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x63 h3 y24 ff2 fs1 fc0 sc0 ls0 ws0">TEST</div><div class="t m0 x63 h3 y107 ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x63 h3 y108 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x40 h3 y109 ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x2 h3 y10a ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x29 h3 y10b ff2 fs1 fc0 sc0 ls0 ws0">Data</div><div class="t m0 x20 h3 y10c ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x7d h3 y10d ff2 fs1 fc0 sc0 ls0 ws0">Spare</div><div class="t m0 x20 h3 y10e ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x7e h3 y10f ff2 fs1 fc0 sc0 ls0 ws0">R1</div><div class="t m0 x64 h3 y110 ff2 fs1 fc0 sc0 ls0 ws0">R2</div><div class="t m0 x33 h3 y111 ff2 fs1 fc0 sc0 ls0 ws0">RJ<span class="ffa">−</span>45</div><div class="t m0 x68 h3 y112 ff2 fs1 fc0 sc0 ls0 ws0">DB1</div><div class="t m0 x7f h3 y113 ff2 fs1 fc0 sc0 ls0 ws0">DB2</div><div class="t m0 x6d h3 y114 ff2 fs1 fc0 sc0 ls0 ws0">Raux1</div><div class="t m0 x80 h3 y115 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(+)</div><div class="t m0 x6a h3 y116 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(<span class="ffa">−</span>)</div><div class="t m0 x81 h3 y117 ff2 fs1 fc0 sc0 ls0 ws0">Raux2</div><div class="t m0 x82 h3 y118 ff2 fs1 fc0 sc0 ls0 ws0">Raux3</div><div class="t m0 x6b h3 y119 ff2 fs1 fc0 sc0 ls0 ws0">D2</div><div class="t m0 x6f h3 y11a ff2 fs1 fc0 sc0 ls0 ws0">D3</div><div class="t m0 x83 h3 y11b ff2 fs1 fc0 sc0 ls0 ws0">Cline</div><div class="t m0 x84 h3 y11c ff2 fs1 fc0 sc0 ls0 ws0">Z_line</div><div class="t m0 x7c h3 y11d ff2 fs1 fc0 sc0 ls0 ws0">COMP<span class="_ _12"></span>SS<span class="_ _11"> </span>OSC</div><div class="t m0 x37 h3 y11e ff2 fs1 fc0 sc0 ls0 ws0">R3</div><div class="t m0 x85 h3 y11f ff2 fs1 fc0 sc0 ls0 ws0">R4</div><div class="t m0 x86 h3 y120 ff2 fs1 fc0 sc0 ls0 ws0">C1comp</div><div class="t m0 x54 h3 y121 ff2 fs1 fc0 sc0 ls0 ws0">C2comp</div><div class="t m0 x14 h3 y122 ff2 fs1 fc0 sc0 ls0 ws0">Rcomp</div><div class="t m0 x87 h3 y123 ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x6 h6 y124 ff6 fs4 fc0 sc0 ls3c ws59">Figure 3 shows the integrated PoE<span class="ff8 ls0 ws0">−<span class="ff6 ws5a">PD and DC</span>−<span class="ff6 ws5a">DC controller configured in a non</span>−<span class="ff6 ws5b">isolated fly</span>−<span class="ff6 ws5b">back configuration. A</span></span></div><div class="t m0 x5 h6 y125 ff6 fs4 fc0 sc0 ls0 ws57">compensation network is inserted between the FB and the COMP pin for overall stability of the feedback loop.</div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>

<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6271a7bed973ef42a4594676/bg4.jpg"><div class="t m0 x11 h9 y57 ff3 fs5 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x12 h5 y58 ff3 fs3 fc0 sc0 ls0 ws0">http://onsemi.com</div><div class="t m0 x2 h3 y59 ff3 fs1 fc0 sc0 ls0 ws0">4</div><div class="t m0 x4b hb yad ff3 fs4 fc0 sc0 ls2f ws53">Simplified Application Diagrams</div><div class="t m0 x88 h5 y126 ff3 fs3 fc0 sc0 ls0 ws5c">Figure 4. Non<span class="ff4 ws0">−</span>Isolated Fly<span class="ff4 ws0">−</span><span class="ws47">back with Extra W<span class="_ _0"></span>inding and Rear Auxiliary Supply</span></div><div class="t m0 x89 h3 y127 ff3 fs1 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x8a h3 y128 ff2 fs1 fc0 sc0 ls0 ws0">Rcs</div><div class="t m0 xa h3 y129 ff2 fs1 fc0 sc0 ls0 ws0">Cvddl</div><div class="t m0 xf h3 y12a ff2 fs1 fc0 sc0 ls0 ws0">Cvddh</div><div class="t m0 x8b h3 y12b ff2 fs1 fc0 sc0 ls0 ws0">Cpd</div><div class="t m0 x8c h3 y12c ff2 fs1 fc0 sc0 ls0 ws0">Css</div><div class="t m0 x8d h3 y12d ff2 fs1 fc0 sc0 ls0 ws0">Rosc</div><div class="t m0 x8a h3 y12e ff2 fs1 fc0 sc0 ls0 ws0">M1</div><div class="t m0 x8e h3 y12f ff2 fs1 fc0 sc0 ls0 ws0">T1</div><div class="t m0 x8f h3 y130 ff2 fs1 fc0 sc0 ls0 ws0">Cload</div><div class="t m0 x90 h3 y131 ff2 fs1 fc0 sc0 ls0 ws0">LD1</div><div class="t m0 x77 h3 ycf ff2 fs1 fc0 sc0 ls0 ws0">Rd1</div><div class="t m0 x91 h3 y132 ff2 fs1 fc0 sc0 ls0 ws0">Rclass</div><div class="t m0 x92 h3 y133 ff2 fs1 fc0 sc0 ls0 ws0">Rilim1</div><div class="t m0 x78 h3 y134 ff2 fs1 fc0 sc0 ls0 ws0">Rinrush</div><div class="t m0 x93 h3 y135 ff2 fs1 fc0 sc0 ls0 ws0">Rslope</div><div class="t m0 x76 h3 y136 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>output</div><div class="t m0 x94 h3 y137 ff2 fs1 fc0 sc0 ls0 ws0">D1</div><div class="t m0 x95 h3 y63 ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 x96 h3 y138 ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x97 h3 y139 ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x2 h3 ye ff2 fs1 fc0 sc0 ls0 ws0">VPORTN2</div><div class="t m0 x7c h3 y13a ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x1e h3 y13b ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x2 h3 y13c ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1</div><div class="t m0 x98 h3 y13d ff2 fs1 fc0 sc0 ls0 ws0">CLASS</div><div class="t m0 x1e h3 y13e ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x98 h3 y6f ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x2 h3 y13f ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x2 h3 y140 ff2 fs1 fc0 sc0 ls0 ws0">TEST</div><div class="t m0 x2 h3 y141 ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x2 h3 y142 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x7b h3 y143 ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x98 h3 y144 ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x99 h3 y145 ff2 fs1 fc0 sc0 ls0 ws0">Data</div><div class="t m0 x29 h3 y146 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x9a h3 y147 ff2 fs1 fc0 sc0 ls0 ws0">Spare</div><div class="t m0 x29 h3 y148 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x9b h3 y149 ff2 fs1 fc0 sc0 ls0 ws0">R1</div><div class="t m0 x7e h3 y14a ff2 fs1 fc0 sc0 ls0 ws0">R2</div><div class="t m0 x9c h3 y14b ff2 fs1 fc0 sc0 ls0 ws0">RJ<span class="ffa">−</span>45</div><div class="t m0 x7f h3 y14c ff2 fs1 fc0 sc0 ls0 ws0">DB1</div><div class="t m0 x9d h3 y14d ff2 fs1 fc0 sc0 ls0 ws0">DB2</div><div class="t m0 x6d h3 y14e ff2 fs1 fc0 sc0 ls0 ws0">Raux1</div><div class="t m0 x9e h3 y14f ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(+)</div><div class="t m0 x80 h3 y150 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(<span class="ffa">−</span>)</div><div class="t m0 x6a h3 y151 ff2 fs1 fc0 sc0 ls0 ws0">Raux2</div><div class="t m0 x9f h3 y152 ff2 fs1 fc0 sc0 ls0 ws0">Raux3</div><div class="t m0 x82 h3 y153 ff2 fs1 fc0 sc0 ls0 ws0">D3</div><div class="t m0 x84 h3 y154 ff2 fs1 fc0 sc0 ls0 ws0">D4</div><div class="t m0 xa0 h3 y155 ff2 fs1 fc0 sc0 ls0 ws0">Cline</div><div class="t m0 xa1 h3 y156 ff2 fs1 fc0 sc0 ls0 ws0">Z_line</div><div class="t m0 xe h3 y157 ff2 fs1 fc0 sc0 ls0 ws0">COMP<span class="_ _13"></span>SS<span class="_ _14"> </span>OSC</div><div class="t m0 x37 h3 y158 ff2 fs1 fc0 sc0 ls0 ws0">R3</div><div class="t m0 x37 h3 y159 ff2 fs1 fc0 sc0 ls0 ws0">R4</div><div class="t m0 x4e h3 y15a ff2 fs1 fc0 sc0 ls0 ws0">C1comp</div><div class="t m0 x77 h3 y15b ff2 fs1 fc0 sc0 ls0 ws0">C2comp</div><div class="t m0 x14 h3 y15c ff2 fs1 fc0 sc0 ls0 ws0">Rcomp</div><div class="t m0 x86 h3 y15d ff2 fs1 fc0 sc0 ls0 ws0">R5</div><div class="t m0 xa2 h3 y15e ff2 fs1 fc0 sc0 ls0 ws0">D2</div><div class="t m0 xa3 h3 y15f ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x6 h6 y160 ff6 fs4 fc0 sc0 ls3c ws5d">Figure 4 shows the same non<span class="ff8 ls0 ws0">−<span class="ff6 ws34">isolated fly</span>−</span><span class="ls1b ws5e">back configuration as Figure 3, but adds a 12<span class="_ _15"> </span>V auxiliary bias winding on the</span></div><div class="t m0 x5 h6 y161 ff6 fs4 fc0 sc0 ls0 ws5f">transformer to <span class="ls3d ws0">provide power to the NCP1083 DC<span class="ff8 ls0">−<span class="_ _0"></span><span class="ff6 ls3d">DC controller via its VDDH pin. This <span class="ls3e ws26">topology shuts off </span><span class="ls3f">the current flowing</span></span></span></span></div><div class="t m0 x5 h6 y162 ff6 fs4 fc0 sc0 ls0 ws60">from VPOR<span class="_ _0"></span>TP to VDDH and therefore reduces the internal power dissipation of the PD, resulting in higher overall power</div><div class="t m0 x5 h6 y163 ff6 fs4 fc0 sc0 ls0 ws0">efficiency<span class="_ _0"></span>.</div><div class="t m0 x31 h5 y164 ff3 fs3 fc0 sc0 ls0 ws61">Figure 5. Non<span class="ff4 ws0">−</span>Isolated Forward Converter with Rear Auxiliary Supply</div><div class="t m0 x89 h3 y165 ff3 fs1 fc0 sc0 ls0 ws0">NCP1083</div><div class="t m0 x8a h3 y10e ff2 fs1 fc0 sc0 ls0 ws0">Rcs</div><div class="t m0 x72 h3 y166 ff2 fs1 fc0 sc0 ls0 ws0">Cvddl</div><div class="t m0 x15 h3 y167 ff2 fs1 fc0 sc0 ls0 ws0">Cvddh</div><div class="t m0 x73 h3 y168 ff2 fs1 fc0 sc0 ls0 ws0">Cpd</div><div class="t m0 xa4 h3 y169 ff2 fs1 fc0 sc0 ls0 ws0">Css</div><div class="t m0 x89 h3 y16a ff2 fs1 fc0 sc0 ls0 ws0">Rosc</div><div class="t m0 x8a h3 y16b ff2 fs1 fc0 sc0 ls0 ws0">M1</div><div class="t m0 x52 h3 y16c ff2 fs1 fc0 sc0 ls0 ws0">T1</div><div class="t m0 xa5 h3 y16d ff2 fs1 fc0 sc0 ls0 ws0">Cload</div><div class="t m0 x90 h3 y16e ff2 fs1 fc0 sc0 ls0 ws0">LD1</div><div class="t m0 x77 h3 y16f ff2 fs1 fc0 sc0 ls0 ws0">Rd1</div><div class="t m0 x91 h3 y170 ff2 fs1 fc0 sc0 ls0 ws0">Rclass</div><div class="t m0 x92 h3 y171 ff2 fs1 fc0 sc0 ls0 ws0">Rilim1</div><div class="t m0 x78 h3 y172 ff2 fs1 fc0 sc0 ls0 ws0">Rinrush</div><div class="t m0 x93 h3 y173 ff2 fs1 fc0 sc0 ls0 ws0">Rslope</div><div class="t m0 x7a h3 y174 ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>output<span class="_ _16"></span>D1</div><div class="t m0 x95 h3 y175 ff2 fs1 fc0 sc0 ls0 ws0">GA<span class="_ _0"></span>TE</div><div class="t m0 x96 h3 y176 ff2 fs1 fc0 sc0 ls32 ws0">RTN</div><div class="t m0 x97 h3 y177 ff2 fs1 fc0 sc0 ls0 ws0">FB</div><div class="t m0 x2 h3 y178 ff2 fs1 fc0 sc0 ls0 ws0">VPORTN2</div><div class="t m0 x7c h3 y179 ff2 fs1 fc0 sc0 ls0 ws0">VDDH</div><div class="t m0 x1e h3 y17a ff2 fs1 fc0 sc0 ls0 ws0">VDDL</div><div class="t m0 x2 h3 y17b ff2 fs1 fc0 sc0 ls0 ws0">VPORTN1</div><div class="t m0 x98 h3 y101 ff2 fs1 fc0 sc0 ls0 ws0">CLASS</div><div class="t m0 x1e h3 y17c ff2 fs1 fc0 sc0 ls0 ws0">ARTN</div><div class="t m0 x98 h3 y17d ff2 fs1 fc0 sc0 ls0 ws0">ILIM1</div><div class="t m0 x2 h3 y17e ff2 fs1 fc0 sc0 ls0 ws0">INRUSH</div><div class="t m0 x2 h3 y17f ff2 fs1 fc0 sc0 ls0 ws0">TEST</div><div class="t m0 x2 h3 y180 ff2 fs1 fc0 sc0 ls0 ws0">AUX</div><div class="t m0 x2 h3 y181 ff2 fs1 fc0 sc0 ls0 ws0">UVLO</div><div class="t m0 x7b h3 y182 ff2 fs1 fc0 sc0 ls0 ws0">CS</div><div class="t m0 x98 h3 y183 ff2 fs1 fc0 sc0 ls0 ws0">VPORTP</div><div class="t m0 x99 h3 y184 ff2 fs1 fc0 sc0 ls0 ws0">Data</div><div class="t m0 x29 h3 y53 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x9a h3 y28 ff2 fs1 fc0 sc0 ls0 ws0">Spare</div><div class="t m0 x29 h3 y185 ff2 fs1 fc0 sc0 ls0 ws0">Pairs</div><div class="t m0 x9b h3 y186 ff2 fs1 fc0 sc0 ls0 ws0">R1</div><div class="t m0 x7e h3 y187 ff2 fs1 fc0 sc0 ls0 ws0">R2</div><div class="t m0 x9c h3 y188 ff2 fs1 fc0 sc0 ls0 ws0">RJ<span class="ffa">−</span>45</div><div class="t m0 x7f h3 yf5 ff2 fs1 fc0 sc0 ls0 ws0">DB1</div><div class="t m0 x9d h3 y189 ff2 fs1 fc0 sc0 ls0 ws0">DB2</div><div class="t m0 x6d h3 y18a ff2 fs1 fc0 sc0 ls0 ws0">Raux1</div><div class="t m0 x9e h3 y18b ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(+)</div><div class="t m0 x80 h3 y18c ff2 fs1 fc0 sc0 ls0 ws0">V<span class="_ _0"></span>AUX(<span class="ffa">−</span>)</div><div class="t m0 x6a h3 y18d ff2 fs1 fc0 sc0 ls0 ws0">Raux2</div><div class="t m0 x9f h3 y11d ff2 fs1 fc0 sc0 ls0 ws0">Raux3</div><div class="t m0 x82 h3 y18e ff2 fs1 fc0 sc0 ls0 ws0">D4</div><div class="t m0 x84 h3 y18f ff2 fs1 fc0 sc0 ls0 ws0">D5</div><div class="t m0 xa0 h3 y190 ff2 fs1 fc0 sc0 ls0 ws0">Cline</div><div class="t m0 xa1 h3 y191 ff2 fs1 fc0 sc0 ls0 ws0">Z_line</div><div class="t m0 xa6 h3 y9b ff2 fs1 fc0 sc0 ls0 ws0">COMP<span class="_ _10"></span>SS<span class="_ _17"> </span>OSC</div><div class="t m0 xa7 h3 y192 ff2 fs1 fc0 sc0 ls0 ws0">R3</div><div class="t m0 xa7 h3 y193 ff2 fs1 fc0 sc0 ls0 ws0">R4</div><div class="t m0 x4e h3 y194 ff2 fs1 fc0 sc0 ls0 ws0">C1comp</div><div class="t m0 x77 h3 y195 ff2 fs1 fc0 sc0 ls0 ws0">C2comp</div><div class="t m0 x14 h3 y196 ff2 fs1 fc0 sc0 ls0 ws0">Rcomp</div><div class="t m0 xa8 h3 y197 ff2 fs1 fc0 sc0 ls0 ws0">D3</div><div class="t m0 x36 h3 y198 ff2 fs1 fc0 sc0 ls0 ws0">D2</div><div class="t m0 xa9 h3 y199 ff2 fs1 fc0 sc0 ls0 ws0">L1</div><div class="t m0 xa3 h3 y19a ff2 fs1 fc0 sc0 ls0 ws0">nCLASS_A<span class="_ _7"></span>T</div><div class="t m0 x6 h6 y19b ff6 fs4 fc0 sc0 ls40 ws62">Figure 5 shows the NCP1083 used in a non<span class="ff8 ls0 ws0">−<span class="ff6 ws63">isolated forward topology<span class="_ _0"></span>.</span></span></div><div class="t m0 x5 h5 y19c ff3 fs3 fc0 sc0 ls0 ws64">High Power Considerations</div><div class="t m0 x6 h6 y19d ff6 fs4 fc0 sc0 ls0 ws65">The NCP1083 is designed to implement various</div><div class="t m0 x5 h6 y19e ff6 fs4 fc0 sc0 ls41 ws66">configurations of high<span class="ff8 ls0 ws0">−<span class="ff6 ls42">power PoE systems including those</span></span></div><div class="t m0 x5 h6 y19f ff6 fs4 fc0 sc0 ls43 ws67">based on<span class="_ _0"></span> <span class="ls44 wsf">the developing IEEE 802.3at standard<span class="fc1 ls45 ws0">. High power</span></span></div><div class="t m0 x5 h6 y1a0 ff6 fs4 fc1 sc0 ls0 ws68">operation can be enabled by a Dual Event Layer 1</div><div class="t m0 x5 h6 y1a1 ff6 fs4 fc1 sc0 ls0 ws69">classification or a Single Event Layer 1 classification</div><div class="t m0 x7 h6 y19d ff6 fs4 fc1 sc0 ls0 ws6a">combined with a Layer 2 high power classification. The</div><div class="t m0 x7 h6 y19e ff6 fs4 fc1 sc0 ls1b ws6b">NCP1083 also supports proprietary designs capable of</div><div class="t m0 x7 h6 y19f ff6 fs4 fc1 sc0 ls0 ws6c">delivering 25 W to 40 W to the load in two<span class="ff8 ws0">−<span class="ff6">pair</span></span></div><div class="t m0 x7 h6 y1a0 ff6 fs4 fc1 sc0 ls10 ws53">configurations. A separate application note describes these</div><div class="t m0 x7 h6 y1a1 ff6 fs4 fc1 sc0 ls46 ws6d">implementati<span class="_ _0"></span>ons<span class="_ _2"></span> (<span class="_ _0"></span>“NCP<span class="_ _0"></span>1081 High<span class="_ _0"></span> <span class="_ _2"></span>P<span class="_ _0"></span>ower P<span class="_ _0"></span>oE Appli<span class="_ _0"></span>cations”).</div><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m1"></div></a></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>