PT4121规格书
QT40241
产品概览DIMENSION概念型精品Q系列DIN导轨电源最突出的特点是转换效率极高、体积小，这得益于同步整流及其它技术设计。
150%的大功率储备足以支持启动直流电机或电容性负载等重负载。
因此，在许多情况下可以使用低功率电源以节省空间和成本。
对快速脉冲群和浪涌电压的抗性高、电磁辐射低，使得本电源几乎可用于任何可能的环境。
UL 60950-1Class I Div 2Marine EMC, LVD, RoHS输入输出输入电流2A/DIV3x400Vac 24Vdc100ms/DIVQ 系列24V/40A 三相输入7. 断电保持时间3AC 400V *)3AC 480V *)断电保持时间 典型值 50ms 50ms 24V, 20A 时，请参阅图7-1 最小值 40ms 40ms 24V, 20A 时，请参阅图7-1 典型值 25ms 25ms 24V, 40A 时，请参阅图7-1最小值20ms20ms24V, 40A 时，请参阅图7-1*)关于仅使用三相2线系统的运行曲线和数值，请参阅第25.4节图7-1 断电保持时间与输入电压图7-2 关断性能，定义01020304050ms 3203604004403x480Vac输入电压断电保持时间24V, 20A ，典型值24V, 40A ，典型值24V, 20A ，最小值24V, 40A ，最小值-5%断电保持时间输出电压输入电压L1 L2 L3Q 系列24V/40A 三相输入8. DC-OK 继电器触点此功能监控电源自身产生的输出电压。
该输出电压与电源输出并联的电源所产生的回馈电压相隔离。
触点闭合 输出电压达到设定输出电压的90%时。
触点断开 输出电压突降至设定输出电压以下10%时。
短时间突降会延长至250ms 的信号长度。
不足1ms 的突降将被忽略。
触点再次闭合 输出电压超过设定电压的90%时。
触点规格 最大值 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A 电阻性负载 最小值5Vdc 时1mA最小容许负载隔离电压 见第21章的绝缘强度表。
PT4121C中文资料
元器件交易网 PT4120 Series
20-W 48-V Input Isolated DC/DC Converter
Typical Characteristics
Efficiency - %
Ripple - mV
PT4121, 3.3 VDC (See Note A)
20-W 48-V Input Isolated DC/DC Converter
Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cout =0µF, and Io =Iomax)
Characteristic
Symbol
Conditions
Ta Ts MTBF — — — —
Over Vin range
Vo = 15V Vo = 12V Vo =5.0V Vo ≤ 3.3V
Over Io Range
Vo ≥5.0V
Vo ≤3.3V
–40° ≤Ta ≤ +85°C
Over Vin range
Vo ≥5.0V
Vo ≤3.3V
Over Io range
Between +Vo and –Vo Input to output
Over Vin range — Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1mS, half-sine, mounted to a fixture Per Mil-Std-883D, method 2007.2, 20-2000Hz, soldered in a PC board — Materials meet UL 94V-0
德国BECTRON PL4122系列
产品详情电气绝缘体系烧注和涂料用树脂BECTRON PL4122-E BLF稀释剂239产品简述BECTRON PL4122 E BLF是一种透明的改性醇酸树脂胶.BECTRON PL4122E BLF 不含有任何芳香族成分。
该绝缘胶即使在环境的影响下仍具有优异的热性能的电性能。
该绝缘胶可提供以下品种：# 三种固含量/黏度可满足不同的应用：。
/37 E BLF。
/40 E BLF…../45 E BLF#不同的颜色易于质量控制：。
E BLF（无色）。
E BLF 橙色（透明）。
E BLF FLZ（带荧光）应用领域：电子涂层：1.用于汽车，船舶和航空的电路板印刷2.混合线圈3.SMD设计4.分立元件特点温度稳定性温度指数 134。
C安全性BECTRON PL4122 E BLF系列产品（Under writes L aboratories）是按照E 211569的要求而准备的。
介电强度高体积电阻率（包括在潮湿状态下）成膜厚度在非常薄的条件下仍具有良好的电性能。
环境影响BECTRON PL4122E BLF可最大限度的保护部件免受机械应力、污染物、潮气、灰尘和腐蚀性气体的破坏。
耐化学性对潮气，弱酸和碱及易在汽车和船舶工业中使用的各种烷烃和不同的油均有良好的抵抗力。
固化工艺：气干23℃，16小时加速固化80℃，0.5小时附着力在-40℃/+130℃温度变化下对印刷电路板仍具有极高的粘结力。
应用工艺BECTRON PL4122 E BLF 可适合喷涂，浸渍，和刷涂工艺。
喷涂工艺推荐的黏度是60秒，4#杯测。
（DIN/EN/ISO 2431）。
IPC-4121 Guidelines for Selecting Core Constructions for Multilayer Printed Wiring Board Application
IPC-4121Guidelines for Selecting Core Constructions for Multilayer Printed Wiring Board ApplicationsASSOCIATION CONNECTING ELECTRONICS INDUSTRIESANSI/IPC-4121January 2000A standard developed by IPCThe Principles of Standardization In May1995the IPC’s Technical Activities Executive Committee adopted Principles of Standardization as a guiding principle of IPC’s standardization efforts.Standards Should:•Show relationship to Design for Manufacturability(DFM)and Design for the Environment(DFE)•Minimize time to market•Contain simple(simplified)language•Just include spec information•Focus on end product performance•Include a feedback system on use andproblems for future improvementStandards Should Not:•Inhibit innovation•Increase time-to-market•Keep people out•Increase cycle time•Tell you how to make something•Contain anything that cannotbe defended with dataNotice IPC Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers,facilitating interchangeability andimprovement of products,and assisting the purchaser in selecting and obtaining with minimumdelay the proper product for his particular need.Existence of such Standards and Publicationsshall not in any respect preclude any member or nonmember of IPC from manufacturing or sell-ing products not conforming to such Standards and Publication,nor shall the existence of suchStandards and Publications preclude their voluntary use by those other than IPC members,whether the standard is to be used either domestically or internationally.Recommended Standards and Publications are adopted by IPC without regard to whether theiradoption may involve patents on articles,materials,or processes.By such action,IPC doesnot assume any liability to any patent owner,nor do they assume any obligation whatever toparties adopting the Recommended Standard or ers are also wholly responsiblefor protecting themselves against all claims of liabilities for patent infringement.IPC Position Statement on Specification Revision Change It is the position of IPC’s Technical Activities Executive Committee(TAEC)that the use and implementation of IPC publications is voluntary and is part of a relationship entered into by customer and supplier.When an IPC standard/guideline is updated and a new revision is pub-lished,it is the opinion of the TAEC that the use of the new revision as part of an existing relationship is not automatic unless required by the contract.The TAEC recommends the use of the lastest revision.Adopted October6.1998Why is there a charge for this standard?Your purchase of this document contributes to the ongoing development of new and updated industry standards.Standards allow manufacturers,customers,and suppliers to understand one another better.Standards allow manufacturers greater efficiencies when they can set up their processes to meet industry standards,allowing them to offer their customers lower costs.IPC spends hundreds of thousands of dollars annually to support IPC’s volunteers in the standards development process.There are many rounds of drafts sent out for review andthe committees spend hundreds of hours in review and development.IPC’s staff attends and participates in committee activities,typesets and circulates document drafts,and follows all necessary procedures to qualify for ANSI approval.IPC’s membership dues have been kept low in order to allow as many companies as possible to participate.Therefore,the standards revenue is necessary to complement dues revenue.The price schedule offers a50%discount to IPC members.If your company buys IPC standards, why not take advantage of this and the many other benefits of IPC membership as well?For more information on membership in IPC,please visit or call847/790-5372. Thank you for your continued support.©Copyright2000.IPC,Northbrook,Illinois.All rights reserved under both international and Pan-American copyright conventions.Any copying,scanning or other reproduction of these materials without the prior written consent of the copyright holder is strictly prohibited and constitutes infringement under the Copyright Law of the United States.ANSI/IPC-4121ASSOCIATION CONNECTINGELECTRONICS INDUSTRIESGuidelines for SelectingCore Constructionsfor Multilayer PrintedWiring Board ApplicationsDeveloped by the Design Guidelines for MLB Materials Task Group(3-11c)of the Base Materials Committee(3-10)of IPCAPPROVED DECEMBER 8, 1999 BYAMERICAN NATIONAL STANDARDS INSTITUTEUsers of this standard are encouraged to participate in thedevelopment of future revisions.Contact:IPC2215Sanders RoadNorthbrook,Illinois60062-6135Tel847509.9700Fax847509.9798AcknowledgmentAny Standard involving a complex technology draws material from a vast number of sources.While the principal members of the IPC Design Guidelines for MLB Materials Task Group(3-11c)of the Base Materials Committee(3-10)are shown below,it is not possible to include all of those who assisted in the evolution of this standard.To each of them,the mem-bers of the IPC extend their gratitude.Base Materials Committee Design Guidelines forMLB Materials Task GroupTechnical Liaisons of theIPC Board of DirectorsChairman Doug Sober isolaUSA ChairmanDoug SoberisolaUSAStan PlzakPensar Corp.Peter BigelowBeaver BrookCircuits Inc.Design Guidelines for MLB Materials Task GroupIvan E.Araktingi,Ph.D.,AlliedSignal Laminate SystemsNanci J.Baggett,Dell Computer Corp.Richard A.Barnett,Compaq Computer Corp.David B.Barr,Clark-Schwebel,Inc. Erik J.Bergum,Polyclad Laminates, Inc.Mike Bryant,BGF Industries,Inc. David J.Corbett,Defense Supply Center ColumbusNitin B.Desai,Motorola,Inc. Robert J.Dunnagan,BGF Industries, Inc.Theodore Edwards,Honeywell Inc. Air Transport Sys.Werner Engelmaier,Engelmaier Associates,L.C.Florian J.Gunkle,Jr.,AlliedSignal Laminate SystemsLaurence G.Johnson,General Electric Co.Dr.Roger A.Jones,ITRIYvonne Julian-Hargrove,DowChemical USARichard E.Kajander,Johns ManvilleBruce R.Kline,TaconicRobert J.Konsowitz,GILTechnologiesJeffrey M.Krech,Multilayer Tek,L.P.Ernest wton,Ph.D.,PPGIndustries,Inc.Edward E.Lewis,Jr.,isolaUSAP.Douglas Lyle,Advanced GlassfiberYarns LLCChris Malik,JPS Glass and IndustrialFabricsThomas F.Martin,Owens-CorningFiberglass Corp.Joel L.Murray,Clark-Schwebel,Inc.Richard Nasielski,NVF Co.Thomas J.Nowak,Nowak&Assoc.Gerard A.O’Brien,PhotocircuitsCorp.Stephen T.O’Meara,NEPTCO,Inc.Kiyoshi Osaka,Shin-Kobe ElectricMachinery Co.Joel S.Peiffer,3M Co.George Pinzon,Nelco Products,Inc.Dr.Paul Reichenbacher,AlliedSignal,Inc.Eston‘‘Rick’’F.Ricketson,TycomCorp.D.Eric Seip,Polyclad Laminates,Inc.Suzanne W.Seymour,TaconicLowell Sherman,Defense SupplyCenter ColumbusGrant W.Smedley,III,RaytheonSystems Co.Douglas J.Sober,isolaUSAThomas A.J.Wegman,Owens-CorningDewey Whittaker,Honeywell Inc.ATSXie Xiaoyan,Dongguan ShengyiLaminate Co.Ltd.IPC-4121January2000 iiTable of Contents1SCOPE (1)1.1Purpose (1)1.2Recommendations (1)1.3Clarifications (1)1.3.1Resin System (1)1.3.2Reinforcement (1)1.3.3Alternate Constructions (1)1.3.4Grading System (1)2APPLICABLE DOCUMENTS (1)2.1IPC (1)3TERMS AND DEFINITIONS (1)3.1Registration Number(REG#) (2)3.2Thickness (2)3.3Construction (2)3.4Resin Content(%RC)...........................................23.5Dielectric Constant(DK) (2)3.6Dielectric Constant Tolerances(DK TOL) (2)3.7Dimensional Stability(DS) (2)3.8Coefficient of Thermal Expansion(Z-CTE) (2)3.9Thickness Tolerance(THICK TOL) (2)3.10Chemical Resistance(CHEM) (2)3.11Measling(MEASLE) (2)3.12Availability(A V AIL) (2)3.13Cost (2)3.14Flatness(FLAT) (2)3.15Smoothness(SMOOTH) (2)3.16Drillability(DRILL) (2)4RECOMMENDATIONS (2)4.1Thickness Categories (2)4.2Construction Comparison (2)January2000IPC-4121iiiIPC-4121January2000This Page Intentionally Left BlankivGuidelines for Selecting Core Constructions for Multilayer Printed Wiring Board Applications1SCOPE1.1Purpose This specification defines guidelines for selecting core constructions in terms offiberglass fabric style and configuration for use in multilayer PWB applica-tions.Each core construction is given a registration number for ordering purposes.Every effort shall be made to peri-odically review the construction guideline and include or exclude constructions based on current data.1.2Recommendations This document groups the core constructions into categories based on relative nominal thickness.Within a nominal thickness category,the differ-ent core constructions are characterized in terms of resin content,dielectric thickness,glass transition temperature (T g),availability,and cost.The core constructions are also compared for performance attributes,including machin-ability,dimensional stability,Z-axis expansion,measle resistance,chemical resistance,andflatness.1.3Clarifications1.3.1Resin System The guideline to registered core constructions is applicable only to laminates as referenced in the appropriate slash sheet.Slash Sheet1Laminates comprised of a majority of difunctional epoxy resin with a T g of110°C to150°C [230°F to302°F](IPC-4101/21).Slash Sheet2Laminates comprised of a modified difunc-tional epoxy resin with a T g range of150°C to200°C [302°F to392°F](IPC-4101/23,IPC-4101/24,and IPC-4101/26).Slash Sheet3Laminates comprised of a majority of cyanate ester resin with a T g range of170°C to220°C [338°F to428°F](IPC-4101/30).Slash Sheet4Laminates comprised of a bismalemide tri-azine resin with a T g range of170°C to230°C[338°F to 446°F](IPC-4101/71).Slash Sheet5Laminates comprised of a majority poly-imide resin with a minimum T g of200°C[392°F](IPC-4101/40,IPC-4101/41,and IPC-4101/42).1.3.2Reinforcement The guideline to registered core constructions is applicable only to laminates comprised of woven‘‘E’’glass fabrics of plain weave as documented in IPC-4412.1.3.2.1Fabric Interchangeability This guideline only references glass style2313.Glass styles2113and3313 may be used as substitutes for2313in each construction shown.1.3.3Alternate Constructions For each thickness cat-egory,other possibilities for constructions may exist and be manufactured commercially.The constructions indicated in the construction selection guide have been chosen based on the consensus of industry experts(both laminate suppliers and PWB fabricators).Alternate constructions may be found that perform better than those listed in the guideline for specific applications and may be used upon agreement between user and supplier.1.3.4Grading System The grading system of the slash sheets are numbered1through5,with each number indi-cating the relative performance between constructions for a particular property or characteristic.The following are the slash sheet core construction indicators.1Core constructions with the most applicable perfor-mance.2Core constructions with better than intermediate levels of performance.3Core constructions with intermediate levels of perfor-mance.4Core constructions with less than intermediate levels of performance.5Core constructions with the least applicable perfor-mance.2APPLICABLE DOCUMENTS2.1IPC1IPC-T-50Terms and Definitions for Interconnecting and Packaging Electronic CircuitsIPC-4412Specification for Finished Fabric Woven from ‘‘E’’Glass for Printed BoardsIPC-4101Specification for Base Materials for Rigid and Multilayer Printed Boards3TERMS AND DEFINITIONSTerms and definitions shall be in accordance with IPC-T-50 and3.1through3.16.1.IPC,2215Sanders Road,Northbrook,IL60062,January2000IPC-412113.1Registration Number(REG#)The assigned code for ordering a laminate of a particular core construction.3.2Thickness The dielectric spacing of the laminate core measured without the metal cladding.3.3Construction The layers of prepreg comprising a laminate in terms of glass style and configuration.For example,1080indicates a construction comprised of one ply of1080style prepreg,while2x2116indicates a con-struction comprised of two plies of2116-style prepreg.3.4Resin Content(%RC)The resin portion by weight of the manufactured laminate expressed as a percent.The approximate resin content for the construction indicated yields the dielectric constant(DK)shown.Resin contents between different manufacturers can be expected to be within±1.5%of the value indicated for resin content.3.5Dielectric Constant(DK)The ratio of the capaci-tance of a configuration of electrodes with a specific mate-rial as the dielectric between them to the capacitance of the same electrode configuration with a vacuum of air as the dielectric.3.6Dielectric Constant Tolerances(DK TOL)The variation in the measured dielectric constant for laminate materials made from the same core construction due to variations in the resin to glass ratio during manufacture. Note:The reference number in the slash sheets should not be used to calculate characteristic impedance.3.7Dimensional Stability(DS)A measurement of the dimensional change in the x and y directions of a material that is caused by factors such as temperature and humidity changes,chemical treatment,and stress exposure.3.8Coefficient of Thermal Expansion(Z-CTE)The lin-ear dimensional change of a material per unit change in temperature in the z-axis direction.Note:Z-axis expansion refers to the dimensional change in terms of the thickness of the laminate as a function of temperature change.3.9Thickness Tolerance(THICK TOL)The variation in dielectric spacing for the laminate material due to the variation in the resin-to-glass ratio and the variation in resinflow during manufacture.3.10Chemical Resistance(CHEM)The ability of a laminate material to resist absorption or swelling due to various processing chemicals.Finer weave fabrics on the laminate surface and higher resin contents generally improve chemical resistance.Coarse fabrics on the lami-nate surface or low resin contents generally reduce chemi-cal resistance.3.11Measling(MEASLE)A condition that occurs in a laminated base material in which internal glassfibers are separated from the resin at the weave intersection.(This condition manifests itself in the form of discrete white spots or‘‘crosses’’that are below the surface of the base material.It is usually related to thermally induced stress.) Finer weave fabrics on the laminate surface and higher resin contents generally improve resistance to measling. Coarse fabrics on the laminate surface or low resin con-tents generally reduce resistance to measling.3.12Availability(AVAIL)An indication of the number of vendors producing the same construction for a particular core thickness and stocking practices.3.13Cost The summation of raw material prices for the materials used in the manufacture of a particular core con-struction.Note:The raw material cost of the laminate is not an indication of the overall quality cost for that particular core construction.3.14Flatness(FLAT)The ability of a laminate to resist warping,bowing,or twisting during printed board manu-facture.An asymmetric construction generally will gener-ate a(-)rating.The recommended constructions are based on balanced copper configurations.3.15Smoothness(SMOOTH)The surface condition of the laminate material in terms of roughness,which is usu-ally associated with the texture of the surface plies of glass. For applications utilizingfiner lines and spaces,a smooth surface is desirable.In general,constructions having afine weave fabric on the surface yield a smoother(+)rating. Laminates comprised of7628prepregs on the surface lay-ers are given a(-)rating.3.16Drillability(DRILL)The ability to drill clean holes in a laminate associated with the core being comprised of fine weave fabrics minates comprised of7628style prepregs are given a(-)rating.4RECOMMENDATIONS4.1Thickness Categories Performance attributes are compared within a given thickness parisons of core constructions based on the numerical performance indicators of two different thickness categories are not valid.For example,constructions FR-411,FR-412,and FR-413are compared to each other but can’t be compared to the thickness category comprised of FR-408,FR-435, and FR-409.4.2Construction Comparison The relative comparison for the core constructions in terms of property characteris-tics and performance considerations can be found in the slash sheets in this document.IPC-4121January2000 2Laminate Construction Selection GuidesSelection Guide #Description1FR-4Copper Clad Laminate Construction Selection Guide (IPC-4101/21)2High T g FR-4Copper Clad LaminateConstruction Selection Guide (IPC-4101/23,IPC-4101/24,and IPC-4101/26)3Cyanate Ester (170°C [340°F]to 230°C [450°F]T g )Copper Clad LaminateConstruction Selection Guide (IPC-4101/30)4BT Copper Clad Laminate Construction Selection Guide (IPC-4101/71)5Polyimide Copper Clad Laminate Construction Selection Guide (IPC-4101/40,IPC-4101/41,and IPC-4101/42)January 2000IPC-41213。
J-SAB-JBF4121G-Ex 手动火灾报警按钮
J-SAB-JBF4121G-Ex手动火灾报警按钮使用说明书（使用产品前，请阅读使用说明书）1概述J-SAB-JBF4121G-Ex手动火灾报警按钮（以下简称手报）是本公司开发的隔爆型手报。
手报是火灾报警系统中的一个报警设备类型，当人员发现火灾时人员可以手动按下手动火灾报警按钮，向火灾报警控制器（以下简称控制器）发出火灾信号。
优良的隔爆设计，满足各种恶劣环境使用。
1.1产品特点●产品采用工业标准要求设计，性能稳定可靠；●核心电路采用SMT表面贴装工艺，可靠性高，一致性好；●采用二总线制系统，无极性要求，在保证低功耗的同时使传输距离最远达1500m；●操作简单，用手按下操作面板，即能实现向控制器发送报警信息；●手动报警按钮复位必须使用与该按钮配套的专用钥匙；●外壳采用高强压铸铝，产品隔爆性好，防护等级达到IP66，抗粉尘污染、抗潮湿及抗腐蚀能力强等特点；●防爆性能符合GB/T3836.1-2021《爆炸性环境第1部分：设备通用要求》、GB/T3836.2-2021《爆炸性环境第2部分：由隔爆外壳“d”保护的设备》、GB/T3836.31-2021《爆炸性环境第2部分：由防粉尘点燃外壳“t”保护的设备》。
防爆标志为Ex dbⅡC T6Gb；Ex tbⅢC T80℃Db；●现场安装时，按GB/T3836.15-2017标准要求、配用与环境相适应的已取得强制性产品认证的电缆引入装置。
1.2适用范围●主要适用场所有：油库、酒库、交通隧道、飞机库、化工设备场所、液化气站等各种易燃、易爆工业领域中，及火灾萌发初期无阴燃阶段或较少阴燃阶段，直接产生明火为主的场所。
●适用于含有II类A、B、C级T1～T6组可燃气体或粉尘与空气形成的爆炸性混合物的1区、2区及21区、22区危险场所。
应用设计遵照国家标准GB50116-2013《火灾自动报警系统设计规范》。
1.3型号组成2工作原理手报由启动开关及相应的处理电路组成，当有火警时，手动按下按钮，按钮开关闭合，报警信号通过回路总线传到控制器，同时手报按钮的火警指示灯由巡检状态的闪亮变为常亮，以显示报警状态。
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尺寸/ੇ๏ʢmmʣ A BCHT 4.5 16 17.5 六角19 G 1/4B 4.5 18 22.5 六角23 G 3/8B 5.5 20 27.5 六角29 G 1/2B 5.5 22 27.5 六角32 G 3/4B
聚乙烯防腐冷缠带规格
聚乙烯防腐冷缠带规格一、产品概述聚乙烯防腐冷缠带是一种用于管道、阀门、法兰等设备的防腐保护材料，具有优异的耐化学腐蚀性能和机械强度，适用于各种工业领域。
二、产品特点1.优异的耐化学腐蚀性能：聚乙烯防腐冷缠带具有很好的耐酸碱、盐类等化学物质的性能。
2.良好的机械强度：聚乙烯防腐冷缠带具有很高的拉伸强度和抗压强度，能够有效地保护管道等设备。
3.易于施工：该产品采用冷缠技术，无需加热即可施工，操作简便快捷。
4.环保健康：聚乙烯材料无毒无味，符合环保要求。
三、产品规格1.厚度：0.5mm-2mm2.宽度：50mm-300mm3.长度：10m-50m4.颜色：黑色、白色、黄色或根据客户要求定制四、使用方法1.清洁：在施工前，应将管道等设备表面清洁干净，去除油污和杂质。
2.涂底漆：在管道表面涂刷底漆，以增加防腐效果。
3.缠绕：将聚乙烯防腐冷缠带缠绕在管道表面，注意保持紧密度和重叠度。
4.压实：使用手动或机械压实器对聚乙烯防腐冷缠带进行压实，以确保其牢固性和紧密性。
5.检查：施工完成后应进行检查，确保聚乙烯防腐冷缠带的完整性和耐久性。
五、适用范围1.石油化工行业：适用于各种输送管道、储罐等设备的防腐保护。
2.城市给排水工程：适用于各种污水管道、自来水管道等设备的防腐保护。
3.电力行业：适用于各种电线电缆、变压器等设备的绝缘保护。
六、注意事项1.施工时应注意安全，避免产生火花或其他危险物品。
2.在储存和运输过程中，应避免阳光直射和雨淋。
3.施工前应检查聚乙烯防腐冷缠带是否有损坏或变形，如有则需更换。
4.施工完成后应及时清理场地，避免杂物堆积影响使用效果。
七、结语聚乙烯防腐冷缠带是一种优异的防腐保护材料，具有很高的耐化学腐蚀性能和机械强度，适用于各种工业领域。
在使用时应注意施工方法和注意事项，以确保其防护效果。
毛萨 AWK-4121 外部无线接入点用户指南说明书
P/N: 1802041210016 *1802041210016*AWK-4121Quick Installation GuideMoxa AirWorksEdition 7.0, February 2017Technical Support Contact Information/supportMoxa Americas:Toll-free: 1-888-669-2872 Tel: 1-714-528-6777 Fax: 1-714-528-6778 Moxa China (Shanghai office): Toll-free: 800-820-5036 Tel: +86-21-5258-9955 Fax: +86-21-5258-5505 Moxa Europe:Tel: +49-89-3 70 03 99-0 Fax: +49-89-3 70 03 99-99 Moxa Asia-Pacific:Tel: +886-2-8919-1230 Fax: +886-2-8919-1231 Moxa India:Tel: +91-80-4172-9088 Fax: +91-80-4132-10452017 Moxa Inc. All rights reserved.OverviewThe AWK-4121 outdoor wireless Access Point is an ideal solution for industrial applications that are hard to wire, too expensive to wire, or use mobile equipment that connect to a TCP/IP network. The AWK-4121 is rated to operate at temperatures ranging from -40 to 75°C, and its dust-tight and weatherproof design is IP68-rated. An IP68 rating means the device is completely protected from dust and is protected against the effects of immersion in water between 15cm and 1m in depth. This means you can set up a WLAN or extend existing wired networks to outdoor locations and still maintain a reliable connection. The AWK-4121 has two redundant DC power inputs for increased reliability, can be powered via PoE (discontinued starting with HW Rev 2.0.0), and is easy to deploy. Package ChecklistMoxa’s AWK-4121 is shipped with the following items. If any of these items is missing or damaged, please contact your customer service representative for assistance.• 1 AWK-4121 wireless AP/bridge/client• 2 omni-directional antennas (5/2 dBi, N-type male, 2.4/5 GHz) •Wall mounting kit (includes 2 supports)•Field-installable power plug•Field-installable RJ45 plug•Metal cap to cover RJ45 connector•Metal cap to cover M12-female connector•Transparent plastic sticks for field-installable plugs•Quick installation guide (printed)•Warranty cardNOTE The above items come with the AWK-4121 standard version. The package contents for customized versions may be different.Panel Layout of the AWK-41211.MAIN antenna port.2.AUX antenna port.3.LEDs for PWR, FAULT,STATE, WLAN and LAN.4.M12 A-coding connector forPWR1 and PWR2.5.M12 8-pin connector forDI/DO6.10/100BaseT(X) RJ45 Port7.RS-232 console port.8.Reset button9.Screw holes for wallmounting10.Waterproof vent11.Grounding screw (M4)12.Screw holes for DIN-railmountingDimensions (unit = mm (inch))Attaching AntennasThe AWK-4121 includes two dual-band omni-directional antenna by default. Attach the antennas as illustrated below.Step 1: Use your fingers and hold the antenna metal N-type connector. Step 2: Screw the antenna N-type connector (male) onto the AWK-4121 device’s N-type connector (female)Antenna Metal N-typeRubber plateWall MountingIn most applications, wall mount provides an easier installation. You will find it quite easy to mount AWK-4121 on the wall, as illustrated below. STEP 1:Attach the wall-mounting kit with M4 screws, as shown in the diagram below.STEP 2:Mounting the AWK-4121 on the wall requires 4 screws. Use the AWK-4121 device, with wall-mounting kitattached, as a guide to mark the correct locations of the 4 screws. The heads of the screws are recommended to be between 5.5mm and 8.5 mm indiameter, and the shafts should not be more than 5.0 mm in diameter, asshown in the figure.Do not screw the screws all the way in to the wall—leave a space of about 2 mm to allow room for sliding the wall-mounting kit between the wall and the screws.STEP 3:Once the screws are fixed into the wall, insert the four screw heads through the large opening of the keyhole-shaped apertures, and then slide the AWK-4121 downwards, as indicated to the right. Tighten the four screws for added stability.⇒DIN-Rail Mounting (Optional)The DK-DC50131 die-cast metal kit can bebought separately, and enable easy androbust installation for the AWK-4121. A pairof DK-DC50131s is needed for DIN-railmounting. To install the DIN-rail mountingkits, tightly attach the two DIN-rail mountingkits on the rear panel of AWK-4121 with 12screws. (6 screws for each kit)To InstallSTEP 1:Use the recessed button on the spring-loaded bracket to lock it into position. STEP 2:Insert the top of the DIN rail into the slot just below the upper hook of the DIN-rail mounting kit. Push the AWK-4121 toward the DIN rail until the DIN-rail attachment bracket snaps into place.To ReleaseSTEP 1:Pull out the two spring-loaded brackets from the bottom until they are fixed in the “release” position. STEP 2:Pull the AWK-4121 out and upward.Wiring RequirementsYou should also pay attention to the following items: •Use separate paths to route wiring for power and devices. If power wiring and device wiring paths must cross, make sure the wires are perpendicular at the intersection point.NOTE: Do not run signal or communications wiring and power wiring in the same wire conduit. To avoid interference, wires with different signal characteristics should be routed separately.•You can use the type of signal transmitted through a wire todetermine which wires should be kept separate. The rule of thumb is that wiring with similar electrical characteristics can be bundled together.• Keep input wiring and output wiring separate.•It is strongly advised that you label wiring to all devices in the system when necessary.Grounding Moxa AWK-4121Grounding and wire routing help limit the effects of noise due toelectromagnetic interference (EMI). Run the ground connection from the ground screw to the grounding surface prior to connecting devices.Installations with Unstable Power InputsThere are cases where the device has to be wired to the same power source as other equipment. In such cases if equipment such as motors that are connected in the circuit draw a large amount of current during operation, the transient voltage drop could potentially cause the AWK to become unstable. Installing a DC/DC power isolator in between the two equipment is recommended to isolate the transient effect and to ensure a stable power input for the AWK.Installations with Cable Extended Antennas for Outdoor ApplicationsIf the antenna or the AWK device is installed outdoors or in an open-air setting, proper lightning protection is required to prevent direct lightning strikes on the AWK device. In order to prevent coupling currents from nearby lightning strikes, a lightning arrester should be installed as part of your antenna system. Ground the device, antenna, as well as the arrester properly to provide maximum outdoor protection for the device.Arrester Accessories•SA-NMNF-01: Surge arrester, N-type (male) to N-type (female) •SA-NFNF-01: Surge arrester, N-type (female) to N-type (female)Wiring the Redundant Power InputsThe AWK-4121 must be connected to a power-over-Ethernet (PoEdiscontinued starting with HW Rev 2.0.0) IEEE 802.3af compliant power source or an IEC60950 compliant limited power source. When AWK-4121 is powered via DC power, the M12 A-coding connector on the bottom panel is used for the AWK-4121’s two redundant inputs. The pin assignment is shown below:Pin Power Input1 V1+ 2V2+ 3 V1- 4V2- 5GNDWiring the Digital Inputs and Relay Contact (Digital Output)The AWK-4121 has two sets of digital input—DI1 and DI2. Each DIcomprises two contacts of the 8-pin M12 connector on the AWK-4121’s bottom panel. These two digital inputs can be connected to digital-output-enabled sensors for on-site status monitoring.The AWK-4121 also has one relay output, which consists of the twocontacts. These relay contacts are used to detect user-configured events. The two wires attached to the Relay contacts form an open circuit when a user-configured event is triggered. If a user-configured event does not occur, the Relay circuit will be closed.A field-installable plug, M12A-8PMM-IP68, is recommended for connecting the AWK-4121’s DIs and relay.Communication Connections10/100BaseT(X) Ethernet Port ConnectionThe 10/100BaseT(X) ports located on the AWK-4121’s bottom panel are used to connect to Ethernet-enabled devices.Below we show pinouts for both MDI (NIC-type) ports and MDI-X (HUB/Switch-type) ports.MDI Port Pinouts MDI-X Port Pinouts8-pin RJ45Pin Signal Pin Signal1 Tx+ 1 Rx+2 Tx- 2 Rx-3 Rx+ 3 Tx+ 6 Rx-6 Tx-RS-232 ConnectionThe AWK-4121 has one RS-232 (8-pin RJ45) console port located on thebottom panel. Use either an RJ45-to-DB9 or RJ45-to-DB25 cable to connect the Moxa AWK-4121’s console port to your PC’s COM port. You may then use a console terminal program to access the AWK-4121 for console configuration.Console Pinouts for 10-pin or 8-pin RJ45 10-PinDescription8-Pin 1 – 2 DSR 1 3 RTS 2 4 GND 3 5 TxD 4 6 RxD 5 7 DCD 6 8 CTS 7 9 DTR 8 10–Pin Signal 1 Relay 2 3 DI1 I1 4 DI1 COM_1 5 DI2 I2 6 DI2 COM_2 7 Reserved8NOTE 1. The pin numbers for male DB9 and DB25 connectors, and hole numbers for female DB9 and DB25 connectors arelabeled on the connector. However, the numbers aretypically quite small, so you may need to use a magnifyingglass to see the numbers clearly.2. The pin numbers for both 8-pin and 10-pin RJ45 connectors(and ports) are typically not labeled on the connector (orport). Refer to the Pinout diagram above to see how RJ45pins are numbered.Waterproof RJ45 PlugDimensions (unit: mm)InstallationSTEP 1: Attach the gasket ① to the housing ③STEP 2: Insert the cable (ex. CAT5e) through the clamp ring ④, screw nut ②, seal ⑤ and housing ③, as follows:STEP 3:Crimp the modular RJ plug to the cable; (NOTE: the snagless cover shield and strain-relief boot are not recommended.) Then, assemble the seals and the housing (③ and ⑤).STEP 4: Tightly screw the clamp ring ④ to thehousing and check to make sure thatthe plug is securely fastened.(NOTE: for a tighter connection, youcan connect the RJ-45 plug to theAWK-4121 before STEP 4.) LED IndicatorsThe front panel of the Moxa AWK-4121 contains several LED indicators. The function of each LED is described in the table below.LEDColor State Description PWR Green On Power is being supplied (from power input 1 or 2, or PoE*).*Discontinued starting with HW Rev 2.0.0OffPower is not being supplied FAULT Red Blinking(slow at 1-second intervals)Cannot get an IP address from the DHCPserverBlinking(fast at 0.5-secondintervals)IP address conflict Off Error condition does not exist.STATEGreen On System startup is complete and the system is in operation.Blinking(fast at 0.5-second intervals) AeroLink Protection is enabled and iscurrently in “Backup” state. Blinking(slow at 1-secondintervals)Device has been located by Wireless Utility Red On System is booting upWLAN Green On WLAN function is in Client/Slave mode.Blinking WLAN’s data communication is run in Client/Slave modeOff WLAN is not in use or not working properly Amber On WLAN function is in AP/Bridge mode.Blink WLAN’s data communication is run in AP/Master modeOff WLAN is not in use or not working properly.LED Color State DescriptionLAN GreenOn LAN port’s 100 Mbps link is active.Blinking Data is being transmitted at 1000 MbpsOff LAN port’s 100 Mbps link is inactive. AmberOn LAN port’s 10 Mbps link is active.Blinking Data is being transmitted at 10/100 MbpsOff LAN port’s 10 Mbps link is inactive.SpecificationsWLAN InterfaceStandards IEEE 802.11a/b/g/n for Wireless LANIEEE 802.11i for Wireless SecurityIEEE 802.3 for 10BaseTIEEE 802.3u for 100BaseTXIEEE 802.3ab for 1000BaseTIEEE 802.3af for Power-over-Ethernet*IEEE 802.1D for Spanning Tree ProtocolIEEE 802.1w for Rapid STPIEEE 802.1Q VLAN*Support for PoE discontinued starting with HWRev 2.0.0Spread Spectrum and Modulation (typical) DSSS with DBPSK, DQPSK, CCKOFDM with BPSK, QPSK, 16QAM, 64QAM 802.11b:•CCK @ 11/5.5 Mbps•DQPSK @ 2 Mbps•DBPSK @ 1 Mbps802.11a/g:•64QAM @ 54/48 Mbps•16QAM @ 36/24 Mbps•QPSK @ 18/12 Mbps•BPSK @ 9/6 Mbps802.11n:•64QAM@******************** (multiple rates supported)Operating Channels (central frequency) US:• 2.412 to 2.462 GHz (11 channels)• 5.18 to 5.24 GHz (4 channels)EU:• 2.412 to 2.472 GHz (13 channels)• 5.18 to 5.24 GHz (4 channels)JP:• 2.412 to 2.484 GHz (14 channels, channel14 only supports DSSS)• 5.18 to 5.24 GHz (4 channels for W52)Security SSID broadcast enable/disableFirewall for MAC/IP/Protocol/Port-based filtering64-bit and 128-bit WEP encryption,WPA/WPA2-Personal and Enterprise (IEEE802.1X/RADIUS、TKIP and AES) Transmission Rates 802.11b: 1, 2, 5.5, 11 Mbps802.11a/g: 6, 9, 12, 18, 24, 36, 48, 54 MbpsTX Transmit Power 802.11b: Typ. 23±1.5 dBm @ 1 to 11 Mbps802.11g:•Typ. 20±1.5 dBm @ 6 to 24 Mbps•Typ. 19±1.5 dBm @ 36 Mbps•Typ. 18±1.5 dBm @ 48 Mbps•Typ. 17±1.5 dBm @ 54 Mbps802.11a:•Typ. 18±1.5 dBm @ 6 to 24 Mbps•Typ. 16±1.5 dBm @ 36 to 48 Mbps•Typ. 15±1.5 dBm @ 54 MbpsRX Sensitivity 802.11b:•-97 dBm @ 1 Mbps•-94 dBm @ 2 Mbps•**************•-90 dBm @ 11 Mbps802.11g:•-93 dBm @ 6 Mbps•-91 dBm @ 9 Mbps•-90 dBm @ 12 Mbps•-88 dBm @ 18 Mbps•-84 dBm @ 24 Mbps•-80 dBm @ 36 Mbps•-76 dBm @ 48 Mbps•-74 dBm @ 54 Mbps802.11a:•-90 dBm @ 6 Mbps•-89 dBm @ 9 Mbps•-89 dBm @ 12 Mbps•-85 dBm @ 18 Mbps•-83 dBm @ 24 Mbps•-79 dBm @ 36 Mbps•-75 dBm @ 48 Mbps•-74 dBm @ 54 MbpsProtocol SupportGeneral Protocols Proxy ARP, DNS, HTTP, HTTPS, IP, ICMP, SNTP,TCP, UDP, RADIUS, SNMP, PPPoE, DHCP,LLDP AP-only Protocols ARP, BOOTP, DHCP, dynamic VLAN-Tags for802.1X-Clients, STP/RSTP (IEEE 802.1D/w) InterfaceDefault Antennas 2 dual-band omni-directional antennas, 5 dBi at2.4 GHz, 2 dBi at 5 GHz, N-type (male) Connector for ExternalN-type (female)AntennasRJ45 Ports 1, 10/100BaseT(X), auto negotiation speed Console Port RS-232 (waterproof RJ45-type)Reset PresentLED Indicators PWR, FAULT, STATE, WLAN, LANAlarm Contact 1 relay output with current carrying capacity of 1A @ 24 VDC, M12 male typeDigital Inputs 2 electrically isolated inputs , M12 male type+13 to +30 V for state “1”+3 to -30 V for state “0”Max. input current: 8 mAPhysical CharacteristicsHousing Metal, providing IP68 protectionWeight 1.5 kgDimensions 224 x 147.7 x 66.5 mm (8.82 x 5.81 x 2.62 in) Installation Wall mounting (standard), DIN-rail mounting(optional), pole mounting (optional) Environmental Limits-40 to 75°C (-40 to 167°F)OperatingTemperatureStorage Temperature -40 to 85°C (-40 to 185°F)5% to 100% (non-condensing)Ambient RelativeHumidityPower RequirementsInput Voltage 12 to 48 VDC, redundant dual DC power inputs or48 VDC Power-over-Ethernet* (IEEE 802.3afcompliant)*Discontinued starting with HW Rev 2.0.0 Connector M12 connector with A-codingPower Consumption 6 W (12 V/0.494 A to 48V/0.121 A, 25°C)PresentReverse PolarityProtectionStandards and CertificationsSafety UL 60950-1, EN 60950-1EMC EN 301 489-1/17; FCC Part 15, Subpart B;EN 55022/55024Radio EN 300 328, EN 301 893, TELECNote: Check Moxa’s website for the most up-to-date certification status.ReliabilityMTBF 364,564 hrsWarrantyWarranty Period 5 yearsDetails See /support/warranty.aspxNOTE For installation flexibility, either the MAIN antenna or the AUX antenna may be selected for use. Make sure the antennaconnection matches the antenna configured in the AWK-4121interface.To protect the connectors and RF module, all radio ports shouldbe terminated by either an antenna or a terminator. The use ofthe resistive terminator for terminating the unused antenna portis strongly recommended.。
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50V 降压型、高亮度 LED 恒流控制器 概述
PT4121 是一款工作在连续电感电流导通模式的降 压型恒流控制器，用于驱动一颗或多颗串联 LED 。 PT4121 输入电压范围从 6V 到 50V，输出电流可调。 PT4121采用高端电流采样设置LED平均电流， 并通 过DIM引脚可以接受模拟调光和很宽范围的PWM调光。 当DIM的电压低于0.3伏时，PT4121关断功率开关，进 入极低工作电流的待机状态。 PT4121 采用 SOT23-6 封装。
单位 V V V W
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封装热阻 θJA (TA=25℃)
C /W
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C C C
kV
推荐工作范围
符号 VIN TOPT 电源电压 工作温度 参数 参数范围 6 ~ 50 -40 to +85 单位 V
o
C
注 1：最大极限值是指超出该工作范围，芯片有可能损坏。电气参数定义了器件在工作范围内并且在保证特定性能指标 的测试条件下的直流和交流电参数规范。对于未给定上下限值的参数，该规范不予保证其精度，但其典型值合理反映了 器件性能。 注 2： 温度升高最大功耗一定会减小， 这也是由 TJMAX, θJA,和环境温度 TA 所决定的。 最大允许功耗为 PDMAX = (TJMAX - TA)/ θJA 或是极限范围给出的数字中比较低的那个值。 注 3：人体模型，100pF 电容通过 1.5kΩ 电阻放电。
2mS/div EN Power On
100mS/div EN Power Off
400µS/div
200µS/div
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50V 降压型、高亮度 LED 恒流控制器 特性曲线（接上页）
VIN CSN DIM
SOT23-6
VCC DRV GND
管脚描述
管脚号 1 1 2 3 4 5 管脚名称 VIN CSN DIM GND DRV VCC 电源输入端，必须就近接旁路电容 电流采样端，采样电阻接在CSN和VIN端之间 开关使能、模拟和 PWM 调光端 信号和功率地 栅极驱动输出，将该引脚连接至外部 MOSFET 的栅极 内部 LDO 输出，连接 1μ F 去耦电容至地 描述
典型应用电路
D1
Rcs
VIN VCC DIM
CSN PT4121 GND DRV
L1
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50V 降压型、高亮度 LED 恒流控制器 管脚
TOP VIEW
20µS/div Open LED Load Protection
20µS/div Open LED Load Recovery
2mS/div
40µS/div
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50V 降压型、高亮度 LED 恒流控制器 特性曲线（接上页）
VIN上电时，电感（L）和电流采样电阻（RS）的初
始电流为零， LED输出电流也为零。这时候， CS比较器 的输出为高，功率开关导通，电流通过电感（L）、电流 采样电阻 （ RS）、 LED和功率开关从 VIN流到地，电流 上升的斜率由VIN、电感（L）和LED压降决定，在RS上 产生一个压差VCSN， 当(VIN-VCSN) > 230mV时，CS比 较器的输出变低，功率开关关断，电流以另一个斜率流过 电感（L）、电流采样电阻（RS）、LED和肖特基二极管
o
注 4：典型参数值为 25˚C 下测得的参数标准。 注 5：规格书的最小、最大规范范围由测试保证，典型值由设计、测试或统计分析保证。
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50V 降压型、高亮度 LED 恒流控制器 简化模块图
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PT4121
50V 降压型、高亮度 LED 恒流控制器 电气参数(注 4, 5)
无特别说明 VIN=24V, TA=25 C 符号 VIN VCC VUVLO VUVLO_HYS FSW 电流采样 VCSN VCSN_HYS ICSN 关断电流 ISD IOFF DIM输入 VDIM VDIM_H VDIM_HYS FDIM_MIN FDIM_MAX RDIM IDIM_H IDIM_L MOSFET驱动 R_source R_sink VOH VOL 开关 TON_MIN TOFF_MIN 过热保护 TSD TSD_HYS 过热保护温度 过热保护迟滞 温度上升 设计保证 150 20 ℃ ℃ 最小开启时间 最小关断时间 设计保证 100 100 ns ns 栅极上拉电阻 栅极下拉电阻 栅极驱动输出高电压 栅极驱动输出低电压 IDRV=10mA IDRV=10mA VGS = 5.0V 6 2 4.8 0.5 Ω Ω V V 内部电路工作电压 DIM输入高电平 DIM输入迟滞电压 最小PWM调光频率 最大PWM调光频率 DIM 对内部工作电压 上拉电阻 DIM接高漏电流 DIM接地漏电流 VDIM = 5V VDIM = 0 20 DIM浮空 4.2 0.3 50 0.1 20 200 2.8 22 0.35 80 V V mV kHz kHz KΩ µA µA 关断电流 静态电流 VDIM<0.3V 无开关信号 60 0.16 100 0.3 µA mA 平均采样电压 采样电压迟滞 CSN管脚输入电流 VIN-VCSN=50mV VIN- VCSN 194 200 ± 15 8 206 mV % µA 参数 输入电压 内部LDO电压 欠压保护 欠压保护迟滞 最大工作频率 VCC下降 VCC上升 测试条件 最小值 6 4.5 5.0 4.5 300 1 典型值 最大值 50 5.5 单位 V V V mV MHz
VIN REGULATOR VCC
CS
CURRENT SENSE COMPARATOR
GATE DRIVER
DRV
REFERENCE
UVLO COMPARATOR
GND
DIM
DIM BUFFER
工作原理描述
PT4121和电感 （L） 、 电流采样电阻 （RS） 、 MOSFET
形成一个自振荡的连续电感电流模式的降压型恒流 LED 控制器。 用细节见后面应用说明。 DIM 管脚也可以通过外加直流电压(VDIM) 调小 LED 电流（模拟调光），最大 LED 电流由采样电阻 RS 决定。 直流电压(VDIM) 的有效的调光范围是 0.5V 到 2.5V。当直 流电压(VDIM)高于 2.5V，输出 LED 电流保持恒定，并由 (0.2/RS)设定。LED 电流还可以通过 DIM 到地之间接一个 电阻到进行调节，内部有一个上拉电阻（典型 200K 欧姆） 接在内部稳压电压 5V 上，DIM 管脚的电压由内部和外部 的电阻分压决定。 DIM管脚在正常工作时可以浮空。当加在 DIM上的电 压低于0.3V时，功率开关关断，LED电流降为零。关断期 间，内部稳压电路保持待机工作，静态电流仅为60μ A。 此外，为了保证可靠性，PT4121内部包含过热保护 功能（TSD），在芯片过热（150℃）时保护芯片和系统。 PT4121还可以通过DIM管脚外接热敏电阻（NTC）到LED 附近，检测温度动态调节LED电流保护LED，详见后面应 用说明。
应用
低压 LED 射灯代替卤素灯 车载 LED 灯 LED 备用灯、应急灯、标志灯 LED 信号灯 液晶电视背光 SELV 照明
定购信息
封装 温度范围 定购型号 包装运输 3000 颗/盘 编带 产品打印
SOT23-6
-40 C to 85 C
o
o
PT4121E23F
4121
特点
极少的外部元器件 很宽的输入电压范围：6V 到 50V 高达 97%的效率 复用 DIM 引脚进行 LED 开关、模拟调光和 PWM 调光 可达 1MHz 开关频率 输出可调的恒流控制方法 3%的输出电流精度 高端电流采样 无需补偿的迟滞控制方式 RCS 开路保护 LED 开路/短路保护 热关断功能
无特别说明 VIN=24V，3LEDs，IOUT=1A，TA=25℃
Open RCS Protection
2S/div
华润矽威科技(上海)有限公司 PT4121_DS_Rev CH 1.0
第7页
PT4121
50V 降压型、高亮度 LED 恒流控制器 应用说明
通过外部电流采样电阻RS设定LED平均电流 LED的平均电流由连接在VIN和CSN两端的电阻RS决 定： 到LED的闪烁。PWM调光比模拟调光的优势在于不改变 LED的色度。PT4121调光频率最高可达20kHz. 关断模式
无特别说明 VIN=24V，3LEDs，IOUT=1A，TA=25℃
PWM Dimming (2KHz,50%)
PWM Dimming (2KHz,1%)
400µS/div Short LED+ to LED- Protection
400µS/div Short LED+ to LED- Recovery
华润矽威科技(上海)有限公司 PT4121_DS_Rev CH 1.0
第4页
PT4121
50V 降压型、高亮度 LED 恒流控制器 特性曲线
无特别说明 VIN=24V，3LEDs，IOUT=1A，TA=25℃
Efficiency
Steady State
2µS/div Input Power On Input Power Off