标题 参考设计报告：使用LYTSwitchTM-0 LYT0006P 设计的6 W非调光、非隔离降压式LED驱动器 规格 90 VAC – 265 VAC输入；54 V，110 mA输出 应用 GU10 LED驱动器（灯替换） 作者 应用工程部 文档编号 日期 修订版本 RDR-355 2013年6月18日 1.0 特色概述 • 单级功率因数校正（在120 V下PF>0.75，在230 V下PF>0.5）及精确恒流(CC)输出 • 元件数量少、PCB占板面积小的低成本解决方案 • 极高能效，在120 VAC输入下效率>91% • 极高能效，在240 VAC输入下效率>90% • 卓越的性能及最终用户体验 • 快速启动时间(<20 ms) – 无可见延迟 • 集成的保护及可靠性能 • 单脉冲空载保护/输出短路保护，带自动恢复功能 • 更大迟滞的自动恢复热关断可同时保护元件和印刷电路板 • 在AC电压缓降期间不会造成任何损坏 • 满足IEC振铃波、差模输入浪涌和EN55015传导EMI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-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 目录 1 2 3 4 简介 ......................................................................................................................................................... 4 电源规格 .................................................................................................................................................. 6 电路原理图 .............................................................................................................................................. 7 电路描述 .................................................................................................................................................. 8 4.1 输入 EMI 滤波 ................................................................................................................................. 8 4.2 LYTSwitch-0 ................................................................................................................................... 8 4.3 输出整流 ......................................................................................................................................... 8 4.4 输出反馈 ......................................................................................................................................... 8 4.5 空载保护 ......................................................................................................................................... 9 5 PCB 布局 ............................................................................................................................................... 10 6 物料清单(BOM) ..................................................................................................................................... 12 7 电感规格 ................................................................................................................................................ 13 7.1 电气原理图 .................................................................................................................................... 13 7.2 电气规格 ....................................................................................................................................... 13 7.3 材料............................................................................................................................................... 13 7.4 电感结构图 .................................................................................................................................... 14 7.5 变压器构造 .................................................................................................................................... 14 8 电感设计表格 ......................................................................................................................................... 15 9 性能数据 ................................................................................................................................................ 17 9.1 带载模式效率 ................................................................................................................................ 18 9.2 输出电流调整 ................................................................................................................................ 19 9.2.1 输入线电压和负载电压到输出电流的调整 ............................................................................ 19 10 热性能 ............................................................................................................................................... 20 10.1 所用设备 ................................................................................................................................... 20 11 热结果 ............................................................................................................................................... 21 11.1 热扫描....................................................................................................................................... 22 12 波形 ................................................................................................................................................... 23 12.1 正常工作时的漏极电压 ............................................................................................................. 23 12.2 正常工作时的漏极电流 ............................................................................................................. 24 12.3 输出短路时的漏极电压和电流 .................................................................................................. 26 12.4 漏极电压和电流启动特征.......................................................................................................... 26 12.5 输出电流启动特征 .................................................................................................................... 27 12.6 输入-输出特征........................................................................................................................... 28 12.7 电压跌落和浪涌 ........................................................................................................................ 29 12.8 电压跌落/缓升 ........................................................................................................................... 30 13 输入浪涌 ............................................................................................................................................ 31 14 传导 EMI............................................................................................................................................ 33 15 音频噪声 ............................................................................................................................................ 35 16 附录 ................................................................................................................................................... 36 17 版本历史 ............................................................................................................................................ 39 Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第2页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 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40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 1 简介 TM 本文档介绍的是一款使用LYTSwitch -0系列器件(LYT0006P)设计的高度紧凑、高性价比 的降压式电源。 该电源可以在90至264 VAC的输入电压范围内进行工作。DC总线电压非常高，足以在使用 降压拓扑时支持54 V输出。在降压式转换器中，输出电压必须始终低于输入电压。此外， 输出电压还受到LYTSwitch-0最大占空比的限制，这也要求输入电压必须高于输出电压。 Figure 1 – Populated Circuit Board Photograph, Top. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第4页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Figure 2 – Populated Circuit Board Photograph, Bottom. 第5页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 2 电源规格 说明 符号 最小值 典型值 最大值 输入 输入电压 VIN 90 频率 fLINE 47 50/60 输出 输出电压 VOUT 52 54 输出电流 IOUT 110 POUT 6 总输出功率 连续输出功率 效率 120 VAC; 54 V LED 265 单位 备注 VAC 双导线 – 无P.E. 工作频率不受限制。如果应用 采用400 Hz线电压频率，则请 调整检测电阻。 Hz 56 V mA 6.5 W η 91 % η 90 % 120 VAC; 54 V LED PF 0.75 240 VAC; 54 V LED PF 0.5 240 VAC; 54 V LED 在100 VAC - 240 VAC 输入下为±4% 在POUT 25 ºC条件下测得 功率因数 在POUT 25 ºC条件下测得 环境 传导EMI 满足CISPR22B / EN55015B要求 输入浪涌 差模(L1-L2) 0.5 振铃波(100 kHz) 差模(L1-L2) 2.5 环境温度 TAMB -10 Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 25 kV kV º C 1.2/50 μs浪涌，IEC 1000-4-5， 串联电阻： 差模：2 Ω 500 A短路 串联电阻： 差模： 2 Ω 自然对流，海平面 UUT（被测电源） 可在–40 ºC下启动 第6页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 3 电路原理图 Figure 3 – Schematic. T1 can be replaced by a drum core inductor if final casing/housing has sufficient room to avoid shorting the magnetic flux. Zener diode VR1 is an option and provides one-time no-load protection. 第7页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 4 电路描述 图3所示的电源在高端降压式配置中采用了LYT0006P (U1)，用以提供110 mA的恒流输 出，输出电压为54 VDC。该电源用于驱动LED，而LED需要始终获得恒流(CC)驱动。 4.1 输入EMI滤波 保险丝RF1提供短路保护。桥式整流管BR1提供全波整流，以获得更高的功率因数。电容 C1和C2以及共模扼流圈L1形成一个π滤波器，用以满足传导EMI标准。电容C1和C2还可 用来储存能量，以降低线路噪声和提供输入浪涌保护。 4.2 LYTSwitch-0 使用LYTSwitch-0能够设计出简单的高性价比LED驱动器，它不仅具有良好的线电压调整 率，而且温度调整范围介于0至100°C之间（LYTSwitch-0壳体温度）。PIXls设计表格通过 平衡功率电感和检测电阻可以实现最佳的线电压调整率。总输入电容也会有一些影响， 但可以通过调整检测电阻(R2/R3)来对其进行补偿，从而优化性能。 LYTSwitch-0产品系列具有内置的发热限制，可以在灯泡的工作温度过高时对电源提供 保护。 降压式转换器级包括LYT0006P (U1)内的集成功率MOSFET开关、续流二极管(D1)、检测 电阻(R2)、功率电感L2和输出电容(C5)。转换器大部分时间都在DCM模式下工作，以便限 制反向电流的周期数。该设计选用了一个快速续流二极管，用来将开关损耗降至最小。 电感L2是标准EE10电感，它将用来限制磁通路径并确保在任何壳体内都获得正确的电感。 在特定的壳体（该壳体对电感的磁通量有已知的影响）中放置后，可以用成本较低的鼓状 磁芯电感将其替换。 4.3 输出整流 快速输出二极管(D1)用来实现良好的效率和进行热管理。对于LED应用，环境温度通常高 于70°C，因此推荐使用具有较低tRR值(<35 nS)的器件。 4.4 输出反馈 调整通过跳过开关周期得以维持。当输出电流增大时，进入FB引脚的电压将随之升高。 如果电压超过VFB，将跳过随后的周期，直到电压降低到VFB以下。电流由R2检测并由C4滤 波，然后反馈至FB引脚，从而提高调整精度实现良好的线电压调整率的关键在于，在计算 出最小电感量后平衡功率电感和检测电阻的取值。 Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第8页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 旁路电容(C4)连接在反馈引脚和源极引脚之间，有助于在检测输出电流时降低功耗。电容 可以为FB引脚提供采样和维持反馈电流的信息。在FB引脚和C4之间不需要放置限流电 阻，因为峰值电压不会超出器件的最大额定值。 4.5 空载保护 本设计中集成了可选的一次性空载保护电路。在出现意外空载工作的情况，输出电容将受 到VR1的保护。齐纳二极管VR1需要在故障后进行更换。 在工作中（LED替换灯），负载始终保持连接，因此可去掉VR1以节省成本。为在板级测 试中（制造过程中）提供保护，可对输入施加40 VAC的电压；如果测不到输出电流，则说 明负载未连接。这种测试允许对电路板进行安全无损的初始上电，而不需要过压保护 电路。 第9页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 5 PCB布局 Figure 4 – Printed Circuit Layout. Top view. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第10页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Figure 5 – Printed Circuit Layout. Bottom View. 第11页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 6 物料清单(BOM) Item Qty Ref Des 1 1 BR1 Description 600 V, 0.5 A, Bridge Rectifier, SMD, MBS-1, 4-SOIC Manufacturer P/N Manufacturer MB6S-TP Micro Commercial 2 1 C1 47 nF, 630 V, Film ECQ-E6473KF Panasonic 3 1 C2 330 nF, 450 V, METALPOLYPRO ECW-F2W334JAQ Panasonic 4 1 C3 100 nF, 25 V, Ceramic, X7R, 0603 VJ0603Y104KNXAO Vishay 5 1 C4 22 μF, 16 V, Ceramic, X5R, 1206 EMK316BJ226ML-T Taiyo Yuden 6 1 C5 47 μF, 63 V, Electrolytic, Gen. Purpose, (6.3 x 13) 63YXJ47M6.3X11 Rubycon 7 1 D1 600 V, 1 A, Ultrafast Recovery, 35 ns, SMB Case MURS160T3G On Semi 8 1 L1 4.7 mH, 0.150 A, 20% RL-5480-3-4700 Renco ERJ-6GEYJ472V Panasonic ERJ-8ENF18R7V Panasonic 9 1 R1 4.7 k Ω, 5%, 1/8 W, Thick Film, 0805 10 1 R2 18.7 Ω, 1%, 1/4 W, Thick Film, 1206 11 1 RF1 4.7 Ω, 5%, 2 W, Metal Film Fusible 12 1 RV1 13 1 T1 275 V, 23 J, 7 mm, RADIAL EE10, Bobbin Inductor LinkSwitch-0, DIP-8B 14 1 U1 15 1 VR1 62 V, 5%, 1 W, DO-41 Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com FW20A4R70JA Bourns V275LA4P Custom SNX-R1699 LYT0006P Littlefuse Kunshan Fengshunhe Santronics USA Power Integrations 1N4759A Vishay 第12页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 7 电感规格 7.1 电气原理图 Figure 6 – Inductor Electrical Diagram. 7.2 电气规格 Primary Inductance 7.3 Pins 4-5, all other windings open, measured at 100 kHz, 0.4 VRMS. 1.4 mH ±7% 材料 Item [1] [2] [3] [4] [5] Description Core: EE10; TDK-PC40EE10/11-Z; or equivalent. Bobbin: EE10; 8 pins (4/4), Horizontal, PI#: 25-00956-00. Magnet Wire: #31 AWG, double coated. Tape: Polyester film, 3M 1350-1, 6.5mm wide. Varnish. 第13页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 7.4 18-Jun-13 电感结构图 Finish (P5) Start (P4) Figure 7 – Inductor Build Diagram. 7.5 变压器构造 Winding Preparation Winding Tape Final Assembly Place bobbin item [2] on the mandrel with pin side 1-4 on the right side. Winding direction is clockwise direction. Start pin 4, wind 150 turns of wire item [3] from right to left then left to right in ~6 layers and finish at pin 5. Secure winding with tape item [4]. Gap cores to get the 1.35 mH inductance. Apply tape to secure both cores. Remove pins: 2 and 3. Figure 8 – Transformer Assembly Sample. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第14页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 8 电感设计表格 ACDC_LYTSwitchZero_052813; Rev.0.8; Copyright Power Integrations 2013 INPUT VARIABLES VACMIN VACNOM VACMAX FL VO IO Pout OUTPUT UNIT LYTSwitchZero_Rev_0-8.xls: LYTSwitchZero Design Spreadsheet 90 120 265 60 54 110 90 120 265 60 54 110 5.94 Volts Minimum AC Input Voltage Volts Hertz Volts mA W Maximum AC Input Voltage Line Frequency Output Voltage Output Current EFFICIENCY 0.9 0.9 CIN 0.38 0.38 uF Input Stage Resistance 4.7 4.7 ohms Switching Topology DC INPUT VARIABLES VMIN VMAX LYTSwitchZero LYTSwitchZero ILIMIT ILIMIT_MIN ILIMIT_MAX FSMIN INPUT INFO Buck Overall Efficiency Estimate (Adjust to match Calculated, or enter Measured Efficiency) Input Filter Capacitor Input Stage Resistance, Fuse & Filtering Type of Switching topology 54.00068302 374.766594 Volts Volts Minimum DC Bus Voltage LYT0006 0.375 0.33275 0.401 62000 Amps Amps Amps Hertz 4.8375 Volts Typical Current Limit Minimum Current Limit Maximum Current Limit Minimum Switching Frequency Maximum On-State Drain To Source Voltage drop VD 0.7 Volts VRR 600 Volts 1 Amps LYT0006 VDS DIODE IF Diode Recommendation OUTPUT INDUCTOR BYV26C Core type Ferrite Ferrite Core size EE10 EE10 Custom Core AE LE AL BW NL BP LG 12.1 26.1 850 6.6 149.6667555 3100 2.253983597 OD 0.132293908 INS 0.031219467 DIA 0.101074441 第15页（共40页） mm^2 mm nH/T^2 mm Gauss mm Freewheeling Diode Forward Voltage Drop Recommended PIV rating of Freewheeling Diode Recommended Diode Continuous Current Rating Suggested Freewheeling Diode Select core type between Ferrite and Off-the-Shelf Select core size Enter custom core description (if used) Core Effective Cross Sectional Area Core Effective Path Length Ungapped Core Effective Inductance Bobbin Physical Winding Width Number of turns on inductor Peak flux density Gap length Maximum Primary Wire Diameter including insulation Estimated Total Insulation Thickness (= 2 * film thickness) Bare conductor diameter Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 AWG Primary Wire Gauge (Rounded to next smaller standard AWG value) Bare conductor effective area in circular mils !!! INCREASE CMA > 200 (increase L(primary layers),decrease NS, use larger Core) 39 CM 12.69920842 CMA 0.112907248 L 18-Jun-13 3 LP L_R IO_Average Output Inductor, Recommended Standard Value DC Resistance of Inductor Average output current Estimated RMS inductor current (at VMAX) 1400 1400 uH 2 2 112.474696 Ohms 112.474696 mA 18.7 Ohms 22 uF Feedback Resistor. Use closest standard 1% value Feedback Capacitor 109.393596 112.474696 114.3382366 mA mA mA Output Current at VACMIN Output Current at VACNOM Output Current at VACMAX ILRMS FEEDBACK COMPONENTS RFB 18.7 CFB OUTPUT REGULATION IO_VACMIN IO_VACNOM IO_VACMAX Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第16页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 9 性能数据 All measurements performed at room temperature (≈25 ºC) otherwise specified. Input VAC Freq (VRMS) (Hz) 90 60 100 60 115 60 120 60 132 60 190 50 200 50 220 50 230 50 240 50 265 50 Input Measurement VIN IIN PIN (VRMS) (mARMS) (W) 90.07 82.57 6.480 100.11 78.53 6.584 110.12 73.24 6.555 120.12 69.70 6.566 135.16 67.07 6.564 190.30 57.15 6.386 200.41 56.02 6.359 220.35 54.16 6.308 230.37 53.68 6.286 264.15 55.86 6.726 90.07 82.57 6.480 第17页（共40页） PF 0.871 0.838 0.813 0.784 0.724 0.587 0.566 0.529 0.508 0.456 0.871 LED Load Measurement VOUT IOUT POUT (VDC) (mADC) (W) 54.0400 108.050 5.918 54.1400 110.150 6.024 54.1400 110.080 6.006 54.1600 110.500 6.021 54.1600 110.590 6.015 54.0200 107.810 5.836 53.9900 107.310 5.805 53.9400 106.430 5.749 53.9200 106.010 5.723 54.2500 112.380 6.098 54.0400 108.050 5.918 Efficiency (%) Regulation (%) 91.33 91.49 91.62 91.70 91.64 91.39 91.29 91.14 91.04 90.66 91.33 -1.77 0.14 0.07 0.45 0.54 -1.99 -2.45 -3.25 -3.63 2.16 -1.77 Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 9.1 18-Jun-13 带载模式效率 Figure 9 – Efficiency with Respect to AC Input Voltage. 90-132 VAC (50 Hz) and 190-265 VAC (60 Hz) Input. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第18页（共40页） 18-Jun-13 9.2 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 输出电流调整 9.2.1 输入线电压和负载电压到输出电流的调整 Figure 10 – Load Regulation, Room Temperature. 第19页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 10 热性能 10.1 所用设备 Chamber: AC Source: Tenney Environmental Chamber Model No: TJR-17 942 Chroma Programmable AC Source Model No: 6415 Wattmeter: Data Logger: Yokogawa Power Meter Model No: WT2000 Yokogawa Model: 2008-3-4-2-2-1D SN: S5L409310 Figure 11 – Thermal Chamber Set-up Showing Box Used to Prevent Airflow Over UUT. Figure 12 – Thermal Unit Thermocouple Measurement Set-up. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第20页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 11 热结果 Input: 90 VAC / 60 Hz Load: 54 V / 110 m A LED load. Location Temperature Thermal Shutdown Thermal Recovery Ambient 23.3 38.7 47.9 58.4 70.0 80.0 90.0 100.0 107.9 40.5 Bridge 37.8 52.4 60.8 70.9 80.7 89.6 99.0 108.5 115.1 64.4 L1 37.2 52.7 60.9 71.2 81.9 90.6 100.4 109.9 117.8 60.2 L2 39.4 54.6 63.7 73.9 84.7 93.4 103.2 112.7 120.6 63.0 IC 40.9 56.9 66.1 76.9 87.6 97.5 107.5 117.8 125.0 61.7 Diode 38.0 53.5 62.8 73.5 83.9 93.3 103.1 113.0 120.1 59.4 Table 1 – Thermal Measurement. Note: Unit will start reliably at -40 °C. Tests were performed but are not shown here. 140 IC Bridge L2 L1 O/P Diode 130 Device Temperature (ºC) 120 110 100 90 80 70 60 50 40 30 20 10 20 30 40 50 60 70 80 90 100 110 Ambient (ºC) Figure 13 – Thermal Performance Curve. 第21页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 120 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 11.1 热扫描 Open-frame thermal measurement at 25°C ambient. UUT was soaked for 1 hour to achieve steady-state before the measurement. Figure 14 – Temperature (°C) at Top Side of PCB. SP1 – U1, LYT0006P. SP2 – L2, Power Inductor. SP3 – L1, EMI Choke. SP4 – FR1, Fusible Resistor. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com Figure 15 – Temperature (°C) at Bottom Side of PCB. SP1 – BR1, Bridge Rectifier. SP2 – PCB, Trace Temperature. SP3 – D1, Freewheeling Diode. 第22页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 12 波形 12.1 正常工作时的漏极电压 Figure 16 – 90 VAC, 60Hz, Full Load F1(Orange): VDRAIN-SOURCE, 100 V / div. Ch1(Yellow): VDRAIN-GND, 100 V / div. Ch2(Red): VSOURCE-GND, 100 V, 2 ms / div. Figure 17 – 265 VAC, Full Load F1(Orange): VDRAIN-SOURCE, 200 V / div. Ch1(Yellow): VDRAIN-GND, 200 V / div. Ch2(Red): VSOURCE-GND, 200 V, 2 ms / div. Figure 18 – 90 VAC, 60Hz, Full Load F1(Orange): VDRAIN-SOURCE, 50 V / div. Ch1(Yellow): VDRAIN-GND, 50 V / div. Ch2(Red): VSOURCE-GND, 50 V, 2 ms / div. Z1(Yellow): VDRAIN-GND, 50 V / div. Z2(Red): VSOURCE-GND, 50 V, 20 μs / div. Figure 19 – 265 VAC, Full Load F1(Orange): VDRAIN-SOURCE, 200 V / div. Ch1(Yellow): VDRAIN-GND, 200 V / div. Ch2(Red): VSOURCE-GND, 200 V, 2 ms / div. Z1(Yellow): VDRAIN-GND, 200V / div. Z2(Red): VSOURCE-GND, 200 V, 20 μs / div. 第23页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 12.2 正常工作时的漏极电流 Missing pulses are normal and are used to regulate the output current. These missing pulses are present every time the sense resistor (R2) voltage-drop reaches 1.65 V. The unit will enter into auto-restart if there is not at least one missing pulse within 50 ms. For some designs wherein the power inductance is high and operating mostly in CCM, a reverse current may be present. One way to avoid this is by increasing the device size or increase input capacitance or adding a blocking diode in the drain. See AN-60 for more details. Figure 20 – 90 VAC, 60 Hz, 54 VLED Ch2(Red): VBULK, 50V / div. Ch4(Green): IDRAIN, 200 mA / div., 1 ms / div. Z2(Green): IDRAIN, 100 mA / div., 20 μs / div. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com Figure 21 – 115 VAC, 60 Hz, 54 VLED Ch2(Red): VBULK, 50 V / div. Ch4(Green): IDRAIN, 200 mA / div., 1 ms / div. Z2(Green): IDRAIN, 100 mA / div., 20 μs / div. 第24页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Figure 22 – 240 VAC, 60 Hz, 54 VLED Ch2(Red): VBULK, 50 V / div. Ch4(Green): IDRAIN, 200 mA / div., 1 ms / div. Z2(Green): IDRAIN, 100 mA / div., 20 μs / div. 第25页（共40页） Figure 23 – 265 VAC, 60 Hz, 54 VLED Ch2(Red): VBULK, 50 V / div. Ch4(Green): IDRAIN, 200 mA / div., 1 ms / div. Z2(Green): IDRAIN, 100 mA / div., 20 μs / div. Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 12.3 输出短路时的漏极电压和电流 Device is operating within the range and no inductor saturation was observed. Figure 24 – LYT0006P Output Short. Ch4: IDRAIN; 0.2 A / div. Time Scale: 20 ms / div. Z4: VDS; 0.2 A / div. Zoom Time Scale: 5 μs / div. Figure 25 – LYT0006P Output Short. Ch4: IDRAIN; 0.2 A / div. Time Scale: 20 ms / div. Z4: VDS; 0.2 A / div. Zoom Time Scale: 2 μs / div. 12.4 漏极电压和电流启动特征 Device is operating within the range and no inductor saturation was observed. Figure 26 – 265 VAC / 50 Hz Start-up. Ch1, Z1: SOURCE Pin to Ground; 100 V / div. Ch2, Z2: Bulk Input; 100 V / div. Ch4, Z4: IDRAIN; 0.2 A / div. Time Scale: 100 μs / div. F1: VDS; 100 V / div. Zoom Time Scale: 500 ns / div. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com Figure 27 – 265 VAC / 50 Hz Start-up. Ch1: SOURCE Pin to Ground; 100 V / div. Ch2: Bulk Input; 100 V / div. Ch4: IDRAIN; 0.2 A / div. Time Scale: 500 ns / div. F1: VDS; 100 V / div. F2: Switching Power; 500 W / div. Zoom Time Scale: 500 ns / div. 第26页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 12.5 输出电流启动特征 Output current/light is present in just one AC cycle. <20 ms Figure 28 – 90 VAC, 60Hz, Full Load Ch1(Yellow): VIN, 200 V / div. Ch2(Red): VOUT, 20 V, Ch3(Blue): IIN, 0.5 A / div. Ch4(Green): IOUT, 100 mA / div., 20 ms / div. 第27页（共40页） Figure 29 – 265 VAC, Full Load Ch1(Yellow): VIN, 200 V / div. Ch2(Red): VOUT, 20 V, Ch3(Blue): IIN, 0.5 A / div. Ch4(Green): IOUT, 100 mA / div., 20 ms / div. Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 12.6 输入-输出特征 There is no limitation to the amount of output capacitance that can be added. If the application requires less output current ripple then increasing the output capacitance is straight forward. Note that the output current waveform below will vary depending on LED load impedance and will vary according to LED type. Figure 30 – 120 VAC, 60 Hz, Full Load Ch1(Yellow): VIN, 200 V / div. Ch2(Red): VOUT, 20 V. Ch3(Blue): IIN, 0.5 A / div. Ch4(Green): IOUT, 100 mA / div, 10 ms / div. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com Figure 31 – 240 VAC, Full Load Ch1(Yellow): VIN, 200 V / div. Ch2(Red): VOUT, 20 V. Ch3(Blue): IIN, 0.5 A / div. Ch4(Green): IOUT, 100 mA / div, 10 ms / div. 第28页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 12.7 电压跌落和浪涌 The inherent advantage of the buck converter implemented with LYTSwitch-0 is the imperceptible start-up delay, the driver will turn-on within 20 ms as shown in the figures below. No failure of any component occurred during line fluctuation tests. Figure 32 – Line sag test at 230 - 0 V at 1 Sec Interval. Ch1: VIN; 100 V / div. Ch2: IOUT; 50 mA / div. Time Scale: 5 s / div. Figure 34 – Line Surge Test at 230 - 265 V at 1 Sec Interval. Ch1: VIN; 100 V / div. Ch2: IOUT; 50 mA / div. Time Scale: 5 s / div. 第29页（共40页） Figure 33 – Line Surge Test at 230 - 265 V at 1 Sec Interval. Ch1: VIN; 100 V / div. Ch2: IOUT; 50 mA / div. Time Scale: 5 s / div. Figure 35 – Line Sag Test at 230 - 265 V at 1 Sec Interval. Ch1: VIN; 100 V / div. Ch2: IOUT; 50 mA / div. Time Scale: 5 s / div. Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 12.8 电压跌落/缓升 No failure of any component during brownout test of 0.5 V / sec AC cut-in and cut-off. Figure 36 – Brown-out Test at 0.5 V / s. The Unit is Able to Operate Normally Without Any Failure and Without Flicker. Ch1: VIN; 100 V / div. Ch2: IOUT; 50 mA / div. Time Scale: 100 s / div. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第30页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 13 输入浪涌 Differential input line 1.2 kV / 50 μs surge testing was completed on a single test unit to IEC61000-4-5. Input voltage was set at 230 VAC / 60 Hz. Output was loaded at full load and operation was verified following each surge event. Surge Level (V) +500 -500 +500 -500 +500 -500 Input Voltage (VAC) 230 230 230 230 230 230 Injection Location Injection Phase (°) Test Result (Pass/Fail) L to N L to N L to N L to N L to N L to N 90 90 270 270 0 0 Pass Pass Pass Pass Pass Pass Unit passed under all test conditions. Differential ring input line surge testing was completed on a single test unit to IEC610004-5. Input voltage was set at 230 VAC / 60 Hz. Output was loaded at full load and operation was verified following each surge event. Surge Level (V) +2500 -2500 +2500 -2500 +2500 -2500 Input Voltage (VAC) 230 230 230 230 230 230 Injection Location Injection Phase (°) Test Result (Pass/Fail) L to N L to N L to N L to N L to N L to N 90 90 270 270 0 0 Pass Pass Pass Pass Pass Pass Unit passed under all test conditions. 第31页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Figure 37 – Differential Line Surge at 500 V / 90°. Peak Drain Voltage Recorded is 678 V. Ch1: VIN; 200 V / div. Ch2: VDRAIN; 200 V / div. Ch3: VBULK; 200 V / div. Time Scale: 1 ms / div. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 18-Jun-13 Figure 38 – Differential Ring Surge at 2500 V / 90°. Peak Drain Voltage Recorded is 468 V. Ch1: VIN; 200 V / div. Ch2: VDRAIN; 200 V / div. Ch3: VBULK; 200 V / div. Time Scale:1 ms / div. 第32页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 14 传导EMI Att 10 dB AUTO dBµV 100 kHz 120 EN55015Q LIMIT CHECK 110 1 MHz PASS 10 MHz SGL 1 QP CLRWR 100 90 2 AV CLRWR TDF 80 70 60 EN55015A 50 6DB 40 30 20 10 0 -10 -20 9 kHz 30 MHz Figure 26 – Conducted EMI, Maximum Steady State Load, 120 VAC, 60 Hz, and EN55015 B Limits. Trace1: EDIT PEAK LIST (Final Measurement Results) EN55015Q Trace2: EN55015A Trace3: --- TRACE FREQUENCY LEVEL dBµV DELTA LIMIT dB 2 Average 9.9415991287 kHz 22.25 N gnd 2 Average 67.8393045788 kHz 23.52 N gnd 2 Average 134.789536006 kHz 38.77 N gnd 1 Quasi Peak 165.693318812 kHz 47.45 L1 gnd -17.72 2 Average 167.350252 kHz 33.66 N gnd -21.42 2 Average 200.175581485 kHz 38.55 N gnd -15.05 1 Quasi Peak 204.199110673 kHz 45.87 N gnd -17.56 2 Average 267.135089486 kHz 34.58 N gnd -16.62 1 Quasi Peak 272.504504785 kHz 44.83 N gnd -16.20 2 Average 397.727746704 kHz 31.37 N gnd -16.53 1 Quasi Peak 401.705024172 kHz 41.34 N gnd -16.47 1 Quasi Peak 475.741040231 kHz 40.79 N gnd -15.62 1 Quasi Peak 536.076911993 kHz 39.85 N gnd -16.14 1 Quasi Peak 610.105531335 kHz 41.66 N gnd -14.33 1 Quasi Peak 806.126927408 kHz 43.14 N gnd -12.85 2 Average 806.126927408 kHz 33.29 N gnd -12.70 1 Quasi Peak 1.00339897152 MHz 39.33 N gnd -16.66 2 Average 2.03372014292 MHz 26.57 N gnd -19.42 1 Quasi Peak 29.2697736439 MHz 43.21 L1 gnd -16.78 2 Average 29.5624713804 MHz 34.37 L1 gnd -15.62 Table 2 – Conducted EMI, Maximum Steady State Load, 120 VAC, 60 Hz, and EN55015 B Limits. 第33页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Power Integrations 17.Oct 12 21:24 RBW MT 18-Jun-13 9 kHz 500 ms Att 10 dB AUTO dBµV 100 kHz 120 EN55015Q LIMIT CHECK 110 1 MHz PASS 10 MHz SGL 1 QP CLRWR 100 90 2 AV CLRWR TDF 80 70 60 EN55015A 50 6DB 40 30 20 10 0 -10 -20 9 kHz 30 MHz Figure 27 – Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55015 B Limits. Trace1: EDIT PEAK LIST (Final Measurement Results) EN55015Q Trace2: EN55015A Trace3: --- TRACE FREQUENCY LEVEL dBµV DELTA LIMIT dB 2 Average 134.789536006 kHz 37.65 L1 gnd 2 Average 200.175581485 kHz 41.49 N gnd -12.10 2 Average 267.135089486 kHz 39.23 N gnd -11.97 2 Average 332.507282579 kHz 35.66 N gnd -13.72 2 Average 475.741040231 kHz 33.70 N gnd -12.71 1 Quasi Peak 592.16241791 kHz 45.66 N gnd -10.33 2 Average 592.16241791 kHz 35.36 N gnd -10.63 1 Quasi Peak 667.263434405 kHz 48.66 N gnd -7.33 2 Average 667.263434405 kHz 36.60 N gnd -9.39 1 Quasi Peak 744.444692652 kHz 48.12 N gnd -7.87 1 Quasi Peak 872.919948931 kHz 50.67 N gnd -5.32 2 Average 872.919948931 kHz 38.46 N gnd -7.53 1 Quasi Peak 954.699692378 kHz 47.91 N gnd -8.08 1 Quasi Peak 1.02356729084 MHz 47.16 N gnd -8.83 1 Quasi Peak 1.55458365781 MHz 43.77 N gnd -12.22 1 Quasi Peak 2.50634031306 MHz 42.47 N gnd -13.53 2 Average 2.93888112801 MHz 31.88 N gnd -14.11 1 Quasi Peak 29.2697736439 MHz 48.08 L1 gnd -11.91 2 Average 29.2697736439 MHz 40.24 L1 gnd -9.75 Table 3 – Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55015 B Limits. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第34页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 15 音频噪声 Input voltage were sweep from 90V to 265Vac at 60Hz line input. +80 +70 +60 +50 +40 d B r +30 +20 A +10 +0 -10 -20 -30 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k Hz Color Line Style Thick Data Axis Cyan Green Yellow Solid Solid Solid 1 1 1 Fft.Ch.1 Ampl Fft.Ch.1 Ampl Fft.Ch.1 Ampl Left Left Left PI Standard Audio Noise (do not edit).at2 Figure 39 – Noise from the UUT at 1 cm from the Center of the Board to Microphone Receiver Position. 第35页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 16 附录 Types of overvoltage protection for a buck converter: Figure 40 – Simple and cheapest approach is to add a Zener diode across the output terminals. In case of no load, the Zener diode will short in order and protect the output capacitor. IC U1 will be limited by the primary current limit. Note that the Zener diode will need to be replaced after this event. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第36页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 Figure 41 – Auto-recovery OVP latch protection. Once AC input is recycled for 2s, the unit will function normally once load is connected. Advantage is lowest no-load consumption and non-damaging failure. 第37页（共40页） Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 Figure 42 – Constant voltage (CV) mode protection. Load can be connected anytime without AC recycle. Disadvantage is it will require some pre-load in order to regulate, which decreases efficiency. Pre-load can be replaced by a appropriately rated Zener in series with a resistor if efficiency is a concern. OVP Protection Zener SCR Latch Constant Voltage Mode 1. 2. 1. 2. 3. Pros Cheapest and simple. VOUT ≈ 0 V at no-load; safe. Auto-recovery. Lowest no-load consumption. VOUT ≈ 0 V at no-load; safe. 1. Hot-plug, load can be connected anytime. 1. 1. 2. 1. 2. 3. Cons Non-auto recovery. Replace Zener once fault is removed. Cost. Requires AC recycle for recovery. Consumes extra power. Residual voltage at no-load. Cost. Table 4 – Overvoltage Protection Comparison. Power Integrations, Inc. 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com 第38页（共40页） 18-Jun-13 RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 17 版本历史 Date 18-Jun-13 Author JDC 第39页（共40页） Revision 1.0 Description & changes Initial Release Reviewed Apps & Mktg Power Integrations 电话：+1 408 414 9200 传真：+1 408 414 9201 www.powerint.com RDR-355：使用LYT0006P设计的6 W非隔离降压式LED驱动器 18-Jun-13 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. Main: +1-408-414-9200 Customer Service: Phone: +1-408-414-9665 Fax: +1-408-414-9765 e-mail: [email protected] 德国 Lindwurmstrasse 114 80337, Munich Germany Phone: +49-895-52739110 Fax: +49-895-527-39200 e-mail: [email protected] 日本 Kosei Dai-3 Building 2-12-11, Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa 222-0033 Japan Phone: +81-45-471-1021 Fax: +81-45-471-3717 e-mail: [email protected] 台湾 5F, No. 318, Nei Hu Rd., Sec. 1 Nei Hu District Taipei 114, Taiwan R.O.C. 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