设计范例报告 标题 参考设计报告:使用LinkSwitchTM-HP LNK6774V 设计的适用于LCD显示器的17 W双路输出反激式 转换器 规格 90 VAC – 265 VAC输入; 5 V, 1 A和18 V, 670 mA输出 应用 LCD显示器 作者 应用工程部 文档编号 RDR-321 日期 2012年9月28日 修订版本 2.2 特色概述 • • • • • • • • 调整精度为±5%的初级侧稳压隔离反激式转换器 132 kHz开关频率可减小变压器及输出滤波器的尺寸。 满载连续导通模式工作可提高效率并降低输出电容纹波电流 多模式工作可提高整个负载范围内的效率 在230 VAC下,输入功率低于100 mW,负载待机功耗为50 mW 采用全面的保护功能,包括过压保护(OVP)、过热保护(OTP)、电压缓升/跌落保护、输入过压 关断保护以及失稳压保护(自动重启动) 满足EN-550022和CISPR-22 Class B传导EMI要求 满足IEC61000-4-5的1 kV/2 kV浪涌电压要求 专利信息 此处介绍的产品和应用(包括产品之外的变压器结构和电路)可能包含一项或多项美国及国外专利,或正在申请的美国或国外 专利。有关Power Integrations专利的完整列表,请参见www.powerint.com。Power Integrations按照在 <http://www.powerint.com/ip.htm>中所述规定,向客户授予特定专利权利的许可。 Power Integrations 5245 Hellyer Avenue, San Jose, CA 95138 USA. 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 目录 1 2 3 4 简介.............................................................................................................................4 电源规格 .....................................................................................................................5 电路原理图 ..................................................................................................................7 电路描述 .....................................................................................................................8 4.1 输入整流和滤波....................................................................................................8 4.2 LinkSwitch-HP 初级 .............................................................................................8 4.3 初级 RCD 箝位 .....................................................................................................8 4.4 输出整流 ..............................................................................................................9 4.5 外部电流限流点设置 ............................................................................................9 4.6 反馈及补偿网络....................................................................................................9 5 PCB 布局 ..................................................................................................................10 6 物料清单(BOM) .........................................................................................................11 7 变压器设计表格 .........................................................................................................12 8 变压器规格 ................................................................................................................16 8.1 电气原理图 .........................................................................................................16 8.2 电气规格 ............................................................................................................16 8.3 材料 ...................................................................................................................16 8.4 变压器结构图:..................................................................................................17 8.5 变压器绕制: .....................................................................................................17 8.6 变压器绕制演示: ..............................................................................................18 9 性能数据 ...................................................................................................................25 9.1 带载模式效率 .....................................................................................................25 9.2 待机模式输入功率及待机效率 ............................................................................27 9.3 18 V 0.67 A DC 负载和 5 V 1 A 平均负载下的线电压调整..................................29 9.4 指定动态负载间档下的输出电压(包括峰值、最小值和平均值).......................31 9.4.1 峰值和最小输出电压的测试方法 .................................................................31 9.4.2 指定负载间档下的 5 V 输出电压 .................................................................32 9.4.3 指定负载间档下的 18 V 输出电压 ...............................................................36 10 热性能 ...................................................................................................................40 11 波形 .......................................................................................................................42 11.1 漏极电压和电流,正常工作 ............................................................................42 11.2 漏极电压和电流启动特征 ................................................................................42 11.3 输出电压启动特征(相对于输入电压) ..........................................................43 11.4 5 V 负载瞬态响应 ...............................................................................................44 11.4.1 采用 5 V、500 mA 至 1500 mA 阶跃负载和固定的 18 V, 0.67 A DC 负载进行 5 V 瞬态测试 .............................................................................................................44 11.4.2 采用指定负载间档进行 5 V 瞬态测试 ..........................................................45 11.4.3 采用指定负载间档进行 18 V 瞬态测试 ........................................................46 11.5 输出纹波和噪声测量 .......................................................................................47 Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第2页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 11.5.1 纹波测量技巧 .............................................................................................. 47 11.5.2 在 18 V 最大负载和 5 V 1 A 稳态负载下测试 18 V 纹波 .............................. 48 11.5.3 在 18 V 最大负载和 5 V 1 A 稳态负载下测试 5 V 纹波 ................................ 49 12 保护功能................................................................................................................ 50 12.1 短路条件下的自动重启动 ............................................................................... 50 12.2 输出过压保护 ................................................................................................. 50 12.3 电压缓升与电压跌落测试 ............................................................................... 51 13 输入浪涌................................................................................................................ 52 14 ESD ...................................................................................................................... 52 15 满载下的 EMI 测试 ................................................................................................ 53 16 版本历史................................................................................................................ 55 重要说明: 虽然本电路板的设计满足安全隔离要求,但工程原型尚未获得机构认证。因此,必须使用 隔离变压器向原型板提供AC输入,以执行所有测试。 第3页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 1 简介 这 份 报 告 介 绍 的 是 一 款 采 用 LinkSwitch-HP 系 列 IC 器 件 LNK6774V 设 计 的 通 用 输 入 、 5 V/1000 mA和18 V/670 mA隔离反激式转换器。它包含完整的电源规格、详细的电路原理 图、构建电源所需的完整物料清单、详尽的电源变压器文档,以及测试数据和最重要的电 气波形的波形图。 Figure 1 – Prototype Top View. Figure 2 – Prototype Bottom View. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第4页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2 电源规格 下表所列为设计的最低可接受性能。实际性能可参考测量结果部分。 说明 输入 电压 频率 符号 VIN fLINE 最小值 典型值 最大值 单位 90 47 50/60 待机模式输入功率 输出 输出电压1 VOUT1 输出纹波电压1 VRIPPLE1 输出电流1 输出瞬态电压1 输出电压2 IOUT1 输出纹波电压2 输出电流2 输出瞬态电压2 总输出功率 连续输出功率 效率 满载效率 VTRANSIENT1 VOUT2 4.75 0.01 4.75 16.2 5 18 265 64 VAC Hz 100 mW 5.25 V 100 mVpp 1500 5.5 26 mA V V VRIPPLE2 备注 双导线 – 无P.E. 230 VAC,5 V 0.01 A, 18 V空载 20 MHz带宽, 稳态负载 参见下面的负载间档 参见下面的负载间档 mV 20 MHz带宽 参见下面的负载间档 参见下面的负载间档 0 IOUT2 VTRANSIENT2 16.2 670 28 mA V POUT 0.05 17.1 W η 80 % 90 VAC且满载 环境 DM 满足CISPR22B / EN55015B要求 其设计符合IEC950、 UL1950 II类要求 1 kV CM 2 Air Contact TAMB -15 -6 0 传导EMI 安全 浪涌 ESD 环境温度 第5页(共56页) 15 6 40 kV kV o C 1.2/50 μs浪涌,IEC 1000-4-5, 串联电阻: 差模:2 Ω 共模: 12 Ω 空气放电至输出连接器 接触放电至输出连接器 自然对流,海平面 Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 Figure 3 – Typical LCD Monitor Load Profile. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第6页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 3 电路原理图 Figure 4 – Circuit Schematic. 第7页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 4 电路描述 4.1 输入整流和滤波 桥式整流管BR1对AC输入进行整流,C2对AC输入进行滤波。电感L1、C1和C2用于衰减 差模和共模传导EMI。在构建变压器T1时采用了屏蔽技术(E-Shield™),以降低共模EMI位 移电流。这种滤波器设计、专有的E-Shield技术加上IC的频率抖动功能,为这种采用Y电容 和初级侧RCD箝位电路的解决方案提供了出色的EMI性能。 4.2 LinkSwitch-HP初级 LNK6774V器件(U1)将振荡器、误差放大器和多模式控制电路、启动和保护电路以及高压 功率MOSFET全部集成到了一个单片IC中。 电源变压器的一端连接到高压总线,另一端连接到U1的漏极引脚。在开关周期开始时, 控制器将功率MOSFET导通,初级绕组中的电流不断增大,从而将能量存储在变压器 磁芯中。当该电流达到内部误差放大器(CP引脚电压)设定的流限阈值时,控制器会关断 功率MOSFET。由于变压器绕组需要调整相位和输出二极管需要调整方向,所存储的能量 会在次级绕组中产生一个电压,这会对输出二极管进行正向偏置,然后将存储的能量传送 到输出电容。 连接到旁路(BP)引脚的电容C5 (4.7 μF)将过压保护(OVP)、失稳压保护(自动重启动)和过 热保护(OTP)设置为在给定关断期间(典型值为1500 ms)后尝试自动重启动。包括锁存 OTP和OVP在内的其他组合可采用不同的电容值进行编程。如需进一步的详细信息,请参 见LinkSwitch-HP数据手册。 4.3 初级RCD箝位 二极管D1、VR1、C3、R1、R2、R3和R4形成RCD缓冲电路,用于限制LinkSwitch-HP上 的电压应力。峰值漏极电压在265VAC输入时可以控制在580V之下,对725V耐压(BVDSS) 的MOSFET管来说有非常大的裕量。齐纳二极管VR1可防止电容C3在每个开关周期完全 放电,从而降低待机工作时的功耗。 二极管D1、R2、VR1、C3、R5和R6形成RCD缓冲电路,用于限制LinkSwitch-HP上的电 压应力。峰值漏极电压在265VAC输入时可以控制在580V之下,对700V耐压(BVDSS)的 MOSFET管来说有非常大的裕量。 Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第8页(共56页) 2012年9月28日 4.4 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 输出整流 对18 V输出的输出整流由二极管D3提供,滤波则由电容C11和C12提供。由R10和C10构 成的缓冲电路提供高频率抖动,以提高EMI性能。对5 V输出的输出整流由二极管D4提供, 滤波则由电容C13和C14以及电感L2提供。由R12和C15构成的缓冲电路提供高频率抖动, 以提高EMI性能。 4.5 外部电流限流点设置 最大逐周期限流点由连接到PD引脚的电阻R6设定。本设计中采用了一个23.2 kΩ电阻, 可将最大限流点设置到LNK6774V的默认限流点的60%。 4.6 反馈及补偿网络 输出电压通过偏置绕组和电阻分压器(R8和R9)在反激期间进行检测。检测到输出电压通 过与FB引脚阈值进行比较来调整输出,或者在检测到过压时停止开关(OVP)。这种初级侧 调节解决方案不仅能降低系统成本,还能延长系统的使用寿命,因为采用LinkSwitch-HP设 计的电源无需使用光耦器(该元件可明显降低电源的寿命)。 分压器R8和R9还用于在集成的功率MOSFET导通期间间接监测总线电压。启动时,IC只 会在总线电压通常达到100 V(电压缓升阈值)的情况下才开始开关。例如,当总线电压 在电压跌落情况下降到40 V典型值以下时,器件将停止开关(电压跌落保护)。一旦总线 电压达到过高水平(例如,由输入浪涌造成),器件将停止开关。此外,逐周期限流点还 会在不同电压下得到补偿,以限制可用的过载功率。如需进一步的详细信息,请参见器件 数据手册。 在FB引脚检测到的电压会在CP引脚产生控制电压。电阻R7以及电容C7和C8用于控制环路 补偿。工作峰值初级电流和工作开关频率由CP引脚电压决定。 第9页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 5 PCB布局 Figure 5 – PCB Top Side. Figure 6 – PCB Bottom Side. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第10页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 6 物料清单(BOM) Item Qty 1 1 Ref Des BR1 2 1 C1 100 nF, 310 VAC, Film, X2 3 1 C2 47 μF, 400 V, Electrolytic, Low ESR, (12.5 x 30) 4 1 C3 10 nF, 630 V, Ceramic, X7R, 1206 C1206C103KBRACTU Kemet 5 2 C4 C8 100 pF 50 V, Ceramic, NPO, 0603 CC0603JRNPO9BN101 Yageo 6 1 C5 4.7 μF, 10 V, Ceramic, X7R, 0805 C0805C475K8PACTU Kemet 7 1 C6 22 μF, 25 V, Ceramic, X5R, 1210 ECJ-4YB1E226M Panasonic VJ0603Y104KNXAO Vishay 440LD22-R Vishay 06032C471KAT2A AVX EKZE350ELL221MJC5S Nippon Chemi-Con UHN0J821MPD Nichicon ECJ-2VC1H100D Panasonic DL4937-13-F Diodes, Inc. BAV21WS-7-F Diodes, Inc. Description 600 V, 1 A, Bridge Rectifier, DFM package 8 1 C7 100 nF, 25 V, Ceramic, X7R, 0603 9 1 2.2 nF, Ceramic, Y1 10 2 11 2 12 2 13 1 C9 C10 C15 C11 C12 C13 C14 C16 470 pF, 200 V, Ceramic, X7R, 0603 220 μF, 35 V, Electrolytic, Very Low ESR, 53 mΩ, (10 x 12.5) 820 μF, 6.3 V, Electrolytic, Low ESR, (8 x 11.5) Mfg Part Number Mfg DF06M Diodes, Inc. B32921C3104M Epcos EPAG401ELL470MK30S Nippon Chemi-Con 14 1 D1 15 1 D2 10 pF, 50 V, Ceramic, NPO, 0805 600 V, 1 A, Rectifier, Fast Recovery, MELF (DL-41) 250 V, 0.2 A, Fast Switching, 50 ns, SOD-323 16 1 D3 100 V, 3 A, Schottky, SMC 30BQ100PBF Vishay 17 1 D4 40 V, 3 A, Schottky, SMD, DO-214AA B340LB-13-F Diodes, Inc. 18 1 F1 Fuse, Pico, 2 A, 250 V, Fast, Axial 0263002.MXL Littlefuse Inc. 19 1 J1 CONN HEADER 3POS (1x3).156 VERT TIN 26-64-4030 Molex 20 1 J2 CONN HEADER 6POS (1x6).156 VERT TIN 26-60-4060 Molex 21 1 L1 ELF18D290C Panasonic 22 1 L2 22 mH, 0.4 A, Common Mode Choke 3.5 mm x 4.45 mm, 68 Ω at 100 MHz, #22 AWG hole, Ferrite Bead 3 kΩ, 5%, 1/4 W, Thick Film, 1206 2743001112 Fair-Rite ERJ-8GEYJ302V Panasonic 100 Ω, 5%, 1/4 W, Thick Film, 1206 ERJ-8GEYJ 101V Panasonic 23 1 R1 24 2 R2 R3 25 1 R4 Panasonic 1 R5 20 Ω, 5%, 1/4 W, Thick Film, 1206 7.5 k Ω, 1%, 1/16 W, Thick Film, 0603 ERJ-8GEYJ 200V 26 ERJ-3GEYJ 752V Panasonic 27 1 R6 23.2 k Ω, 1%, 1/16 W, Thick Film, 0603 ERJ-3EKF2322V Panasonic 28 1 R7 100 k Ω, 5%, 1/16 W, Thick Film, 0603 ERJ-3GEYJ 104V Panasonic 29 1 R8 46.4 kΩ, 1%, 1/16 W, Thick Film, 0603 ERJ-3EKF4642V Panasonic 30 1 10.5 kΩ, 1%, 1/16 W, Thick Film, 0603 ERJ-3EKF1052V Panasonic 31 2 10 Ω, 5%, 1/8 W, Thick Film, 0805 ERJ-6 GEYJ100V Panasonic 36 kΩ, 5%, 1/8 W, Thick Film, 0805 ERJ-6GEYJ363V Panasonic NTC Thermistor, 5 Ohms, 4.7 A Bobbin, EF25, Horizontal, 12 pins Transformer LinkSwitch-HP, eDIP-12P CL-150 YC2504 SNX-R1652 LNK6774V Thermometrics Ying Chin Santronics USA Power Integrations 1SMB59xxBT3G Semiconductor 32 1 R9 R10 R12 R11 33 1 RT1 34 1 T1 35 1 U1 36 1 VR1 120 V, 550 mW, 5%, SMB, 403A 37 1 VR2 OPEN 第11页(共56页) OPEN Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 7 变压器设计表格 ACDC_LinkSwitchHP_051612; Rev.0.13; Copyright Power Integrations 2012 INPUT OUTPUT UNIT LinkSwitch-HP Flyback Transformer Design Spreadsheet ENTER APPLICATION VARIABLES VACMIN 90 90 V Minimum AC Input Voltage VACMAX 265 265 V Maximum AC Input Voltage fL 50 50 Hz AC Mains Frequency VO 5 5 V Output Voltage (main) PO 17 17 W Output Power n 0.82 0.82 Efficiency Estimate Z 0.50 0.50 Loss Allocation Factor VB 10 10 V tC 3 3 ms Bridge Rectifier Conduction Time Estimate CIN 47 47 uF Input Filter Capacitor Bias Voltage ENTER LINKSWITCH-HP VARIABLES LinkSwitch-HP LNK6774V LNK6774V ILIMITMIN 0.967 A Minimum Current limit ILIMITMAX 1.113 A Maximum current limit 0.600 A Current limit reduction factor KI 0.60 ILIMITMIN_EXT 0.580 A ILIMITMAX_EXT 0.668 A fS 132000 Hz LinkSwitch-HP Switching Frequency: Choose between 132 kHz and 66 kHz fSmin 124000 Hz LinkSwitch-HP Minimum Switching Frequency fSmax 140000 Hz LinkSwitch-HP Maximum Switching Frequency KP 0.5 0.50 VOR 110 110.00 Ripple to Peak Current Ratio (0.4 < KP < 6.0) V Reflected Output Voltage Voltage Sense VUVON 100 100.00 VUVOFF 42.55 V VOV 446.26 V FMAX_FULL_LOAD 132885 Hz Maximum switching frequency at full load FMIN_FULL_LOAD 117698 Hz Minimum switching frequency at full load 1.77 us Minimum available Diode conduction time at light load. This should be greater than 1.11 us TSAMPLE_FULL_LOAD TSAMPLE_LIGHT_LOAD Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第12页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 Rpd 23.20 k-ohm 10.00 nF Program delay Capacitor Total programmed delay 0.06 sec Total program delay VDS 4.11 V Cpd 10 Program delay Resistor LinkSwitch-HP on-state Drain to Source Voltage VD VDB 0.70 V ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES Core Type EF25 Core EF25 Selected Core Custom Core Enter name of custom core is applicable AE 0.5180 0.518 cm^2 LE 5.7800 5.78 cm AL 2000.0 2000 nH/T^2 BW 15.6 15.6 mm Bobbin Physical Winding Width M 0.00 0.00 mm Safety Margin Width (Half the Primary to Secondary Creepage Distance) 4.00 4 L NS 3.00 3 Core Effective Cross Sectional Area Core Effective Path Length Ungapped Core Effective Inductance Number of Secondary Turns DC INPUT VOLTAGE PARAMETERS VMIN 85 85 V Minmum DC Input Voltage VMAX 375 375 V Maximum DC Input Voltage CURRENT WAVEFORM SHAPE PARAMETERS DMAX 0.58 Maximum Duty Cycle IAVG 0.24 A IP 0.56 A Peak Primary Current 0.33 A Primary RMS Current IR IRMS TRANSFORMER PRIMARY DESIGN PARAMETERS LP_TYP LP_TOL 7 1436 uH Typical Primary Inductance 7 % Primary inductance Tolerance NP 60 Primary Winding Number of Turns NB 6 Bias Winding Number of Turns ALG 399 nH/T^2 Gapped Core Effective Inductance BM 2607 Gauss Maximum Flux Density at PO, VMIN (BM<3000) BP 3301 Gauss Peak Flux Density (BP<3700) BAC 652 Gauss AC Flux Density for Core Loss Curves (0.5 X Peak to Peak) 第13页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 ur 1776 LG 0.13 mm Gap Length (Lg > 0.1 mm) BWE 62.4 mm Effective Bobbin Width 0.32 mm Maximum Primary Wire Diameter including insulation INS 0.05 mm Estimated Total Insulation Thickness (= 2 * film thickness) DIA 0.27 mm Bare conductor diameter 30 AWG Primary Wire Gauge (Rounded to next smaller standard AWG value) 310 Cmils/Amp Primary Winding Current Capacity (200 < CMA < 500) 37.40 k-ohms OD 0.32 AWG Relative Permeability of Ungapped Core CM CMA FEEDBACK SENSING SECTION RFB1 Feedback divider upper resistor RFB2 TRANSFORMER SECONDARY DESIGN PARAMETERS (SINGLE OUTPUT EQUIVALENT) Lumped parameters ISP 11.29 A Peak Secondary Current ISRMS 5.61 A Secondary RMS Current IO 3.40 A Power Supply Output Current IRIPPLE 4.46 A Output Capacitor RMS Ripple Current CMS 1122 Cmils Secondary Bare Conductor minimum circular mils 19 AWG Secondary Wire Gauge (Rounded up to next larger standard AWG value) 0.91 mm AWGS DIAS ODS Secondary Minimum Bare Conductor Diameter 5.20 INSS 2.14 mm Maximum Secondary Insulation Wall Thickness VDRAIN 626 V Peak voltage acoss drain to source of Linkswitch-HP PIVS 24 V Output Rectifier Maximum Peak Inverse Voltage VOLTAGE STRESS PARAMETERS PIVB TRANSFORMER SECONDARY DESIGN PARAMETERS (MULTIPLE OUTPUTS) 1st output VO1 5.00 5 V Output Voltage IO1 1.00 1.00 A Output DC Current 5.00 W Output Power 0.35 V Output Diode Forward Voltage Drop PO1 VD1 0.35 NS1 2.92 ISRMS1 1.651 Output Winding Number of Turns A Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com Output Winding RMS Current 第14页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 IRIPPLE1 1.31 A Output Capacitor RMS Ripple Current PIVS1 23 V Output Rectifier Maximum Peak Inverse Voltage CMS1 330 Cmils Output Winding Bare Conductor minimum circular mils AWGS1 24 AWG Wire Gauge (Rounded up to next larger standard AWG value) DIAS1 0.51 mm Minimum Bare Conductor Diameter ODS1 5.35 mm Maximum Outside Diameter for Triple Insulated Wire 2nd output VO2 18.00 V Output Voltage IO2 0.67 A Output DC Current 12.06 W Output Power 0.5 V Output Diode Forward Voltage Drop PO2 VD2 0.50 NS2 10.09 ISRMS2 1.106 A Output Winding RMS Current IRIPPLE2 0.88 A Output Capacitor RMS Ripple Current PIVS2 81 V Output Rectifier Maximum Peak Inverse Voltage CMS2 221 Cmils Output Winding Bare Conductor minimum circular mils AWGS2 26 AWG Wire Gauge (Rounded up to next larger standard AWG value) DIAS2 0.41 mm Minimum Bare Conductor Diameter ODS2 1.55 mm Maximum Outside Diameter for Triple Insulated Wire 第15页(共56页) Output Winding Number of Turns Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 8 变压器规格 8.1 电气原理图 Figure 7 – Transformer Electrical Diagram. 8.2 电气规格 Electrical Strength Primary Inductance Resonant Frequency Primary Leakage Inductance 8.3 1 second, 60 Hz, from pins 1-6 and pins 7-12. Pins 5-6, all other windings open, measured at 100 kHz, 0.4 VRMS. Pins 5-6, all other windings open. Pins 5-6, with pins 7-12 shorted, measured at 100 kHz, 0.4 VRMS. 3000 VAC 1436 μH ±7% 1500 kHz (Min.) 15 μH (Max.) 材料 Item [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] Description 2 Core: EF25, TDK PC44-EF25Z, and gapped ALG 398.9 nH/T . Bobbin: EF25-Horizontal, 12 pins (6/6), Ying Chin, P/N: YC-2504. Magnet wire: #32 AWG Solderable, double coated. Magnet wire: #27 AWG Solderable, double coated. Magnet wire: #28 AWG Solderable, double coated. Teflon tube: Alpha Wire, TFT, or equivalent. Tape: 3M 44 Margin tape (cream), 3.5 mm wide, or equivalent. Tape: 3M 1298 Polyester Film, 8.6 mm wide, 2.0 mils thick, or equivalent. Tape: 3M 1298 Polyester Film, 15.6 mm wide, 2.0 mils thick, or equivalent. Varnish: Dolph BC-359, or equivalent. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第16页(共56页) 2012年9月28日 8.4 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 变压器结构图: Teflon tubes 6 4 WD5 (2nd half Primary): 30T -#32AWG 8 12 10,9 8.7 1 3 WD4: (2 nd Secondary): 7T – 2 x #28AWG WD3 (1 st Secondary): 3T – 4 x #27AWG WD2 (VBias+Vsense): 6T – 4 x #32AWG 4 WD1 (1st half Primary): 30T -#32AWG 5 3.5mm margin tape Figure 8 – Transformer Build Diagram. 8.5 变压器绕制: Winding preparation WD1 st 1 Half Primary Insulation WD2 VBias+VSense Insulation WD3 st 1 Secondary Insulation WD4 nd 2 Secondary Insulation WD5 nd 2 Half Primary Final Assembly Place the bobbin item [2] on the mandrel with the primary side is on the left side. Winding direction is clockwise direction. Margin tape item [7] should be applied for all windings. Note: Teflon tubes item [6] should be inserted into all wire ends and reach to inside edge of margin tapes. Return wires should be inside the winding section and not overlap on the margin tape. (See pictures below). Start at pin 5, wind 30 turns of wire item [3] from left to right with tight tension, at the last turn bring the wire back to the left, and terminate at pin 4. Place 1 layer of tape item [8]. Start at pin 3, wind 6 quad-filar turns of wire item [3] from left to right with tight tension, at the last turn bring the wire back to the left, and terminate at pin 1. Place 3 layers of tape item [9]. Start at pins 8,7, wind 3 quad-filar turns of wire item [4] from right to left, spread the wire evenly, at the last turn bring the wire back to the right, and terminate at pin 10,9. Place 1 layer of tape item [8]. Start at pins 12, wind 7 bi-filar turns of wire item [5] from right to left, spread the wire evenly, at the last turn bring the wire back to the right, and terminate at pin 8. Place 3 layers of tape item [9]. Start at pin 4, wind 30 turns of wire item [3] from left to right with tight tension, at the last turn bring the wire back to the left, and terminate at pin 6. Grind and secure core halves with tape. Vanish item [10]. 第17页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 8.6 2012年9月28日 变压器绕制演示: Winding Preparation Place the bobbin item [2] on the mandrel with the primary-side is on the left side. Winding direction is clockwise direction. WD1 st 1 Half Primary Start at pin 5, wind 30 turns of wire item [3] from left to right with tight tension, at the last turn bring the wire back to the left, and terminate at pin 4. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第18页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 return wire not overlap onto margin tape Teflon tubes should reach to inside edge of margin Insulation WD2 VBias+VSense 第19页(共56页) Place 1 layer of tape item [8]. Start at pin 3, wind 6 quad-filar turns of wire item [3] from left to right with tight tension, Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 return wires not overlap onto margin tape At the last turn bring the wire back to the left, and terminate at pin 1. Insulation Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com Place 3 layers of tape item [9]. 第20页(共56页) 2012年9月28日 WD3 st 1 Secondary RDR-321:适用于LCD显示器的17 W双路输出反激式电源 Start at pins 8, 7, wind 3 quadfilar turns of wire item [4] from right to left, spread the wire evenly, At the last turn bring the wire back to the right, and terminate at pin 10, 9. 第21页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 Insulation nd 2 WD4 Secondary 2012年9月28日 Place 1 layer of tape item [8]. Start at pins 12, wind 7 bi-filar turns of wire item [5] from right to left, spread the wire evenly, At the last turn bring the wire back to the right, and terminate at pin 8. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第22页(共56页) 2012年9月28日 Insulation WD5 nd 2 Half Primary RDR-321:适用于LCD显示器的17 W双路输出反激式电源 Place 3 layers of tape item [9]. Start at pin 4, wind 30 turns of wire item [3] from left to right with tight tension, At the last turn bring the wire back to the left, and terminate at pin 6. 第23页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 Core Assembly Grind and secure core halves with tape. Varnish Transformer and Finish Varnish item [10]. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第24页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 9 性能数据 All measurements performed at room temperature and 50 Hz line frequency, except where otherwise stated. For all tests, the full load is 1000 mA for the 5 V output and 670 mA for the 18 V output (17 W total output power). 9.1 带载模式效率 87 90 115 230 265 86 Efficiency (%) 85 84 83 82 81 80 20 30 40 50 60 70 80 90 18 V Load (%) Figure 9 − Efficiency vs. LCD brightness, Room Temperature. 第25页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 100 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 88 87 Efficiency (%) 86 85 84 83 82 81 80 70 90 110 130 150 170 190 210 230 250 270 290 Input Voltage (VAC) Figure 10 – Full Load Efficiency vs. Input Voltage, Room Temperature. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第26页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 9.2 待机模式输入功率及待机效率 Standby power and efficiency is measured using a 10 mA load on the 5 V output. The 18 V output is unloaded. 0.12 Input Power (W) 0.11 0.10 0.09 0.08 0.07 0.06 70 90 110 130 150 170 190 210 230 250 270 Input Voltage (VAC) Figure 11 – Standby Input Power vs. Input Line Voltage, Room Temperature. 第27页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 290 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 63 62 Standby Efficiency (%) 61 60 59 58 57 56 55 54 53 52 51 70 90 110 130 150 170 190 210 230 250 270 290 Input Voltage (VAC) Figure 12 – Standby Efficiency vs. Input Voltage, Room Temperature. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第28页(共56页) 2012年9月28日 9.3 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 18 V 0.67 A DC负载和5 V 1 A平均负载下的线电压调整 5.30 5.25 5 V Output Voltage (V) 5.20 5.15 5.10 5.05 5.00 4.95 4.90 70 90 110 130 150 170 190 210 230 250 270 Input Voltage (VAC) Figure 13 – 5 V Line Regulation under Full Load. 第29页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 290 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 20.0 19.5 18 V Output Voltage (V) 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 70 90 110 130 150 170 190 210 230 250 270 290 Input Voltage (VAC) Figure 14 – 18 V Line Regulation under Full Load. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第30页(共56页) 2012年9月28日 9.4 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 指定动态负载间档下的输出电压(包括峰值、最小值和平均值) 9.4.1 峰值和最小输出电压的测试方法 Figure 15 shows how the peak value and minimum value were collected. The power supply was loaded with the specified load profile in Figure 3. 18 V output load (LCD brightness) is always a pulsed load from 0 to 0.67 A with different duty cycle and 5 V load is always transient from 0.5 A to 1.5 A. Scope were used to record the peak value and minimum value for both output voltage, and the mean value is recorded with multimeter. Figure 15 – Test Method for Peak and Minimum Output Voltage. 第31页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 9.4.2 指定负载间档下的5 V输出电压 Figures below shows mean regulation (measured with multimeter), peak and minimum output voltage (measured with scope) under specified dynamic load profile. 5.45 Min Mean Max 5 V Output Votlage (V) 5.35 5.25 5.15 5.05 4.95 4.85 4.75 0 10 20 30 40 50 60 70 80 90 100 LED Brightness (%) Figure 16 – 5 V Output Voltage under Specified Load Profile at 90 VAC. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第32页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 5.45 Min Mean Max 5 V Output Votlage (V) 5.35 5.25 5.15 5.05 4.95 4.85 4.75 0 10 20 30 40 50 60 70 80 90 LED Brightness (%) Figure 17 – 5 V Output Voltage under Specified Load Profile at 115 VAC. 第33页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 100 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 5.45 Min Mean Max 5 V Output Votlage (V) 5.35 5.25 5.15 5.05 4.95 4.85 4.75 0 10 20 30 40 50 60 70 80 90 100 LED Brightness (%) Figure 18 – 5 V Output Voltage under Specified Load Profile at 230 VAC. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第34页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 5.45 Min Mean Max 5 V Output Votlage (V) 5.35 5.25 5.15 5.05 4.95 4.85 4.75 0 10 20 30 40 50 60 70 80 90 LED Brightness (%) Figure 19 – 5 V Output Voltage under Specified Load Profile at 265 VAC. 第35页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 100 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 9.4.3 指定负载间档下的18 V输出电压 26 Min Mean Max 25 18 V Output Votlage (V) 24 23 22 21 20 19 18 17 16 0 10 20 30 40 50 60 70 80 90 100 LED Brightness (%) Figure 20 – 18 V Output Voltage under Specified Load Profile at 90 VAC Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第36页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 26 Min Mean Max 25 18 V Output Votlage (V) 24 23 22 21 20 19 18 17 16 0 10 20 30 40 50 60 70 80 90 LED Brightness (%) Figure 21 – 18 V Output Voltage under Specified Load Profile at 115 VAC. 第37页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 100 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 26 Min Mean Max 25 18 V Output Votlage (V) 24 23 22 21 20 19 18 17 16 0 10 20 30 40 50 60 70 80 90 100 LED Brightness (%) Figure 22 – 18 V Output Voltage under Specified Load Profile at 230 VAC. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第38页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 26 Min Mean Max 25 18 V Output Votlage (V) 24 23 22 21 20 19 18 17 16 0 10 20 30 40 50 60 70 80 90 LED Brightness (%) Figure 23 – 18 Output Voltage under Specified Load Profile at 265 VAC. 第39页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 100 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 10 热性能 The unit was allowed to reach thermal equilibrium prior to the measurement. Figure 24 is the temperature profile of the board at room temperature. Figure 24 – Top (Right) and Bottom (left) Side Thermal Images at 265 VAC, Full Load, Room Temperature. Table below shows the temperature of key components at 40 °C .The power supply was sealed into a box first, and the box was placed into a thermal chamber with 40 °C ambient. Temperatures of LinkSwitch-HP SOURCE pin and cathode pin of the output diode were measured at system full load (18 V/0.67 A, 5 V/1 A average). Temperature was recorded after the thermal reading was stable. Temperature measurements of key components were taken using T-type (CopperConstantan) thermocouples. The thermocouples were soldered directly to a SOURCE pin of the LNK6774V device and to the cathode of the output rectifier. The thermocouples were glued to the external core and to winding surfaces of the transformer. The unit was sealed inside a large box to eliminate any air currents. The ambient temperature outside the box was raised to 40 °C. The unit was then operated at full load (5 V, 1 A and 18 V 0.67 A) and the temperature measurements were taken after they stabilized for 1 hour at 40 °C. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第40页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 Temperature (°C) Item 90 VAC 265 VAC LN6774V (U1) 76 79 5 V Output Diode 63 63 18 V Output Diode 61 61 Transformer 61 68 These results show that the IC has an acceptable rise in temperature. 第41页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 11 波形 11.1 漏极电压和电流,正常工作 Figure 25 – 90 VAC, Full Load. Upper: VDRAIN, 100 V / div. Lower: IDRAIN, 0.2 A, 5 μs / div. Figure 26 – 265 VAC, Full Load. Upper: VDRAIN, 200 V / div. Lower: IDRAIN, 0.2 A, 5 μs / div. 11.2 漏极电压和电流启动特征 Drain and current profile during startup was tested with 5 V average 1 A load and 18 V no-load, since the power supply always start up into 18 V no load based on the specification. 5 V was tested with the dynamic load specified in the specification. Figure 27 – 90 VAC, 5 V Dynamic, 18 V No-Load. Upper: VDRAIN, 100 V / div. Lower: IDRAIN, 0.2 A, 2 ms / div. Figure 28 – 265 VAC 5 V Dynamic, 18 V No-Load. Upper: VDRAIN, 200 V / div. Lower: IDRAIN, 0.5 A, 2 ms / div. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第42页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 11.3 输出电压启动特征(相对于输入电压) Figure 29 – Start-up Profile, 90 VAC, Standby Load. Upper: VOUT, 5 V, 1 V / div. Lower: VOUT, 18 V, 5 V, 5 ms / div. Figure 30 – Start-up Profile, 265 VAC, Standby Load. Upper: VOUT, 5 V, 1 V / div. Lower: VOUT, 18 V, 5 V, 5 ms / div. Figure 31 – Start-up Profile, 90 VAC, Full CC Load. Upper: VOUT, 5 V, 1 V / div. Lower: VOUT, 18 V, 5 V, 5 ms / div. Figure 32 – Start-up Profile, 265 VAC, Full CC Load. Upper: VOUT, 5 V, 1 V / div. Lower: VOUT, 18 V, 5 V, 5 ms / div. 第43页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 11.4 5 V负载瞬态响应 11.4.1 采用5 V、500 mA至1500 mA阶跃负载和固定的18 V, 0.67 A DC负载进行5 V瞬态 测试 Figure 33 – 90 VAC, 18 V 0.67 A. Upper: VOUT, 5 V, 200 mV / div. Lower: IOUT, 5 V, 1 A, 50 ms / div. Figure 34 – 115 VAC, 18 V 0.67 A. Upper: VOUT, 5 V, 200 mV / div. Lower: IOUT, 5 V, 1 A, 50 ms / div. Figure 35 – 230 VAC, 18 V 0.67 A. Upper: VOUT, 5 V, 200 mV / div. Lower: IOUT, 5 V, 1 A, 50 ms / div. Figure 36 – 265 VAC, 18 V 0.67 A. Upper: VOUT, 5 V, 200 mV / div. Lower: IOUT, 5 V, 1 A, 50 ms / div. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第44页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 11.4.2 采用指定负载间档进行5 V瞬态测试 VOUT_5V 5V Load 18V Load Figure 37 – 90 VAC, 5 V 1 A Dynamic Load and 18 V 0 to 0.67 A Step Load. Upper: VOUT, 5 V, 100 mV / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 38 – 115 VAC, 5 V 1 A Dynamic Load and 18 V 0 to 0.67 A Step Load. Upper: VOUT, 5 V, 100 mV / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 39 – 230 VAC, 5 V 1 A Dynamic Load and 18 V 0 to 0.67 A Step Load. Upper: VOUT, 5 V, 100 mV / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 40 – 265 VAC, 5 V 1 A Dynamic Load and 18 V 0 to 0.6 A Step Load. Upper: VOUT, 5 V, 100 mV / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. 第45页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 11.4.3 采用指定负载间档进行18 V瞬态测试 Figure 41 – 90 VAC, 5 V 1 A Average Load. Upper: VOUT, 18 V, 1 V / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 42 – 115 VAC, 5 V 1 A Average Load. Upper: VOUT, 18 V, 1 V / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 43 – 230 VAC, 5 V 1 A Average Load. Upper: VOUT, 18 V, 1 V / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Figure 44 – 265 VAC, 5 V 1 A Average Load. Upper: VOUT, 18 V, 1 V / div. Lower: IOUT, 18 V, 0.5 A, 5 ms / div. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第46页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 11.5 输出纹波和噪声测量 11.5.1 纹波测量技巧 For DC output ripple measurements, a modified oscilloscope test probe must be utilized in order to reduce spurious signals due to pick-up. Details of the probe modification are provided in the figures below. The 5125BA probe adapter is affixed with two capacitors tied in parallel across the probe tip. The capacitors include one (1) 0.1 μF / 50 V ceramic type and one (1) 1.0 μF / 50 V aluminum electrolytic. The aluminum electrolytic type capacitor is polarized, so proper polarity across DC outputs must be maintained (see below). Probe Ground Probe Tip Figure 45 – Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed). Figure 46 – Oscilloscope Probe with Probe Master 5125BA BNC Adapter. (Modified with wires for probe ground for ripple measurement, and two parallel decoupling capacitors added). 第47页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 11.5.2 在18 V最大负载和5 V 1 A稳态负载下测试18 V纹波 Figure 47 – 18 V Ripple, 90 VAC, Full Load. Upper: 18 VRIPPLE, 5 ms, 50 mV / div. Lower: 18 VRIPPLE, 20 μs, 50 mV / div. Figure 48 – 18 V Ripple, 115 VAC, Full Load. Upper: 18 VRIPPLE, 5 ms, 50 mV / div. Lower: 18 VRIPPLE, 20 μs, 50 mV / div. Figure 49 – 18 VRIPPLE, 230 VAC, Full Load. Upper: 18 VRIPPLE, 5 ms, 50 mV / div. Lower: 18 VRIPPLE, 20 μs, 50 mV / div. Figure 50 – 18 VRIPPLE, 265 VAC, Full Load. Upper: 18 VRIPPLE, 5 ms, 50 mV / div. Lower: 18 VRIPPLE, 20 μs, 50 mV / div. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第48页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 11.5.3 在18 V最大负载和5 V 1 A稳态负载下测试5 V纹波 Figure 51 – Output Ripple, 90 VAC, Full Load. Upper: 5 VRIPPLE, 5 ms, 20 mV / div. Lower: 5 VRIPPLE, 20 μs, 20 mV / div. Figure 52 – Output Ripple, 115 VAC, Full Load. Upper: 5 VRIPPLE, 5 ms, 20 mV / div. Lower: 5 VRIPPLE, 20 μs, 20 mV / div. Figure 53 – Output Ripple, 230 VAC, Full Load. Upper: 5 VRIPPLE, 5 ms, 20 mV / div. Lower: 5 VRIPPLE, 20 μs, 20 mV / div. Figure 54 – Output Ripple, 265VAC, Full Load. Upper: 5 VRIPPLE, 5 ms, 20 mV / div. Lower: 5 VRIPPLE, 20 μs, 20 mV / div. 第49页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 12 保护功能 12.1 短路条件下的自动重启动 Pin=0.26 W Figure 55 – Short-Circuit, 90 VAC. Upper: VDS, 100 V / div. Lower: 5 VLOAD, 500 ms, 2 A / div. Pin=0.3 W Figure 56 – Short-Circuit, 265 VAC. Upper: VDS, 200 V / div. Lower: 5 VLOAD, 500 ms, 2 A / div. 12.2 输出过压保护 Output OVP was tested by connecting a 100 kΩ resistor between CP pin and BP pin output. Figure 57 – Output OVP, 265 VAC, Standby Load. VOUT, 5 V, 1 V, 500 ms / div. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com Figure 58 – Output OVP, 265 VAC, Full Load. VOUT, 5 V, 1 V, 50 ms / div. 第50页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 12.3 电压缓升与电压跌落测试 At full load, AC input was transient from 0 VAC to 120 VAC for brown-in test and from 120 VAC to 0 VAC for brown-out test. Slew rate of input voltage is 12 VAC/S for brown-in and brown-out test. Figure 59 – Brown-In Test, Full Load. Upper: VAC, 200 V / div. Lower: 5 VOUT, 2 V, 100 ms / div. Figure 60 – Brown-In Test, Full Load. Upper: VAC, 200 V / div. Lower: 5 VOUT, 2 V, 200 ms / div. 第51页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 13 输入浪涌 Differential input line 1.2/50 μs surge testing was conducted on a single test unit to IEC61000-4-5. Input voltage was set at 230 VAC. Resistor loads were used for both outputs (5 V/1 A and 18 V/0.67 A). Output regulation was verified after the test. Surge Level (V) D.M. +1000 –1000 C.M. +2000 –2000 Input Voltage (VAC) 230 230 230 230 Injection Location (2Ù source) L1 to L2 L1 to L2 (12Ù source) L1, L2 to PE L1, L2 to PE 90 270 Test Results (Pass/Fail # Strikes) 10 Strikes each Level Pass Pass 90 270 Pass Pass Injection Phase (°) 14 ESD ESD passes at 8 KV for contact discharge and 15kV for air discharge, no output glitch and latch off was found during the test. Device Discharge Type Discharge Location + Output Terminal Contact - Output Terminal LNK6774V + Output Terminal Air - Output Terminal Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com Voltage +8 kV -8 kV +8 kV -8 kV +15 kV -15 kV +15 kV -15 kV # of Events (1/sec) 10 10 10 10 10 10 10 10 Remarks PASS PASS PASS PASS PASS PASS PASS PASS 第52页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 15 满载下的EMI测试 At 115 VAC and 230 VAC, conducted emissions tests were performed at full load (0.67A DC load for 18 V and 1 A DC load for 5 V). Composite EN55022B / CISPR22B conducted limits are shown. All the tests show excellent EMI performance. Figure 61 – Conducted EMI at 115 VAC 60 Hz, Full Load, Output Return Connected to Ground. Figure 62 – Conducted EMI at 115 VAC 60 Hz, Full Load, Output Return Connected to Artificial Hand. 第53页(共56页) Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 Figure 63 – Conducted EMI at 230 VAC 60 Hz, Full Load, Output Return Connected to Ground. Figure 64 – Conducted EMI at 230 VAC 60 Hz, Full Load, Output Return Connected to Artificial Hand. Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com 第54页(共56页) 2012年9月28日 RDR-321:适用于LCD显示器的17 W双路输出反激式电源 16 版本历史 Date Author 28-Sep-12 KM 第55页(共56页) Revision Description & changes 2.2 Initial Release Reviewed Marketing and Apps Power Integrations 电话:+1 408 414 9200 传真:+1 408 414 9201 www.powerint.com RDR-321:适用于LCD显示器的17 W双路输出反激式电源 2012年9月28日 有关最新产品信息,请访问:www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. PATENT INFORMATION The products and applications illustrated herein (including transformer construction and circuits’ external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS, Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, StackFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. ©Copyright 2012 Power Integrations, Inc. Power Integrations全球销售支持网络 全球总部 5245 Hellyer Avenue San Jose, CA 95138, USA. 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