FT838D 5V2A 设计报告 Description Symbol Min Type Max Unit Comment Input Voltage Vin 90 / 264 Vac Input Frequency Fline 47 50/60 63 Hz No-load Input Power (@230Vac) Active Mode Efficiency Pst / / 150 mw η / / 80.0 % Output Voltage Vout 4.75 5.0 5.25 V Output Current Iout / 2.0 / A Over Current Protection Output Ripple Voltage Ambient Temperature Iout-max / / 2.228 A Auto-restart Vripple / / 120 mv Tamb 0 / 45 Measured at the end of PCB Vin=115Vac and 230Vac
目录 1. 电路原理图 2. PCB 版图 3. 物料清单 4. 变压器 共模电感制作图 5. 效率 纹波等基本功能测试 6. 特性曲线测试 6.1.1 输入 - 输出特性曲线图示 6.1.2 输出 V-I 特性曲线 7. 开 / 关机延时测试 8. 动态负载响应测试 9. 关键元器件波形图测试 9.1 Static Condition 9.2 Transient Condition 10. 温度测试 11. EMI 测试
1 电路原理图
2 PCB 版图 PCB 整体布局图示 PCB 顶层布局图示
PCB 底层布局图示
3 物料清单 工位 物料名称 型号规格 封装尺寸 用量 C1,C2 铝电解电容 10uF/400V D:10mm; L:16mm 2 C3 铝电解电容 4.7u/50V D:5mm; L:11mm 1 C4 贴片陶瓷电容 22pF25V X7R 0805 1 C5 贴片陶瓷电容 4.7nF/630V X7R 1206 1 C6 铝电解电容 1500uF/10V Low ESR D:10mm; L:16mm 1 C7 铝电解电容 680uF/10V Low ESR D:8mm; L:12mm 1 C8 贴片陶瓷电容 1000pF/250V X7R 1206 1 CX1 X2 电容 0.1uF K 275Vac 脚距 10mm 1 CY1 Y1 电容 1nF Y1 400V 脚距 10mm 1 R1,R2 厚膜贴片电阻 1.5M ±5% 1206 2 R3 厚膜贴片电阻 82K ±5% 0805 1 R4 厚膜贴片电阻 43K ±1% 0805 1 R5 厚膜贴片电阻 12K ±1% 0805 1 R6,R8 厚膜贴片电阻 Open -- 0 R7 厚膜贴片电阻 10R ±5% 0805 1 R9,R10,R11 厚膜贴片电阻 2R4 ±5% 0805 3 R12 厚膜贴片电阻 150K ±5% 0805 1 R13 厚膜贴片电阻 150R ±5% 0805 1 R14 厚膜贴片电阻 330R ±5% 0805 1 R15 厚膜贴片电阻 1.2K ±5% 0805 1 R16 厚膜贴片电阻 4R7 ±5% 0805 1 D1,D3 整流二极管 1N4007 1A/1000V DO-41 2 D2,D4,D6 整流二极管 M7 1A/1000V SMA 3 D5 整流二极管 RS1M 1A/1000V SMA 1 D8 肖特基整流二极管 MBR1045CT 10A/45V TO-220AC 1 D9 整流二极管 LL4148 0.15A/100V SOD80 1 Q1 N-MOSFET FQU3N60 3A/600V I-PAK 1 F1 延迟熔断保险管 T2A/250V D:3.6mm; L:10mm 1 VD1 压敏电阻 07D471K 07D 1 T1 高频变压器 EE19 卧式 5+5pin EE19 1 L1 共模电感 EE8.3 卧式双槽 2+2pin EE8.3 1 L2 RH 型穿线磁珠 RH3.5*9*0.8 D:3.5mm; L:9mm 1 L3 贴片磁珠电感 4.7uH 1206 1 U1 电源驱动 IC FT838D SOT23-5 1
4 变压器 共模电感制作图 变压器制作图
辉芒微电子 ( 深圳 ) 有限公司 Fremont Micro Devices Co., Ltd. 共模电感制作图
5 效率 纹波等基本功能测试 所有测试均在室温下进行 Vin Iout Pin Measure at the end of DC-Cable Measure at the end of PCB OCP (Vac) (A) (W) Vout Vrip. η AV-η Vout η AV-η (V) (mv) (%) (%) (V) (%) (%) 0 0.06 5.16 9.6 / 5.13 / 0.5 3.23 5.07 28.4 78.48 5.12 79.26 90 115 230 264 1.0 6.48 5.06 40.4 78.09 76.91 5.19 80.09 1.5 9.93 5.06 52.4 76.44 5.28 79.76 2.0 13.59 5.07 72.6 74.61 5.37 79.03 0 0.06 5.14 12.0 / 5.12 / 0.5 3.24 5.06 25.2 78.09 5.11 78.86 1.0 6.46 5.06 43.2 78.33 77.26 5.19 80.34 1.5 9.85 5.06 54.0 77.06 5.28 80.41 2.0 13.42 5.07 64.4 75.56 5.37 80.03 0 0.09 5.14 10.8 / 5.11 / 0.5 3.39 5.07 28.4 74.78 5.12 75.52 1.0 6.63 5.06 39.2 76.32 75.73 5.20 78.43 1.5 9.96 5.06 49.6 76.20 5.28 79.52 2.0 13.41 5.07 62.4 75.62 5.37 80.09 0 0.11 5.14 11.6 / 5.11 / 0.5 3.45 5.07 29.2 73.48 5.12 74.20 1.0 6.72 5.07 39.6 75.45 74.90 5.20 77.38 1.5 10.07 5.07 48.8 75.52 5.29 78.80 2.0 13.52 5.08 67.2 75.15 *Note: DC-Cable: Rcable=150mΩ OCP tested condition: CV=2.5V 5.38 79.59 (ma) 79.54 2228 79.91 2226 78.39 2194 77.49 2183 Ripple voltage is measured using oscilloscope with bandwidth limited to 20MHz. A 4.7uF/25V electrolytic capacitor and a 0.1uF/50V ceramic capacitor shall be connected to the connector in parallel.
6 特性曲线测试 6.1.1 输入 - 输出特性曲线测试 Vout(V) 5.30 5.20 5.10 5.00 4.90 4.80 4.70 6.1.2 输出 V-I 特性曲线测试 Vout(V) 6 5 4 3 2 80 100 120 140 160 180 200 220 240 260 280 Vin (Vac) 115Vac 230Vac Open Load Rated Load 1 0 0 500 1000 1500 2000 2500 Vin (Vac)
7 开 / 关机延时测试 Vin=90Vac, Open Load CH4:Input Voltage; CH1:Output Voltage Tdelay=2340mS Vin=264Vac, Open Load CH4:Input Voltage; CH1:Output Voltage Tdelay=21400mS Vin=90Vac, Rated Load CH4:Input Voltage; CH1:Output Voltage Tdelay=2340mS Vin=264Vac, Rated Load CH4:Input Voltage; CH1:Output Voltage Tdelay=101mS
8 动态负载响应测试 Vin=90Vac Vin=264Vac Load:0A-1A-0A Freq:100Hz Duty:50% Slew-Rate:0.15A/uS CH1:Output Voltage; CH4:Output Current Vo-max=5.36V; Vo-min=4.30V Vin=90Vac Load:1A-2A-1A Freq:100Hz Duty:50% Slew-Rate:0.15A/uS CH1:Output Voltage; CH4:Output Current Vo-max=5.28V; Vo-min=4.80V Load:0A-1A-0A Freq:100Hz Duty:50% Slew-Rate:0.15A/uS CH1:Output Voltage; CH4:Output Current Vo-max=5.38V; Vo-min=4.30V Vin=264Vac Load:1A-2A-1A Freq:100Hz Duty:50% Slew-Rate:0.15A/uS CH1:Output Voltage; CH4:Output Current Vo-max=5.28V; Vo-min=4.82V
Vin=90Vac Vin=264Vac Load:0A-2A-0A Freq:1Hz Duty:50% Slew-Rate:0.15A/uS Vo-max=5.52V; Vo-min=3.76V 9 关键元器件波形图测试 9.1 Static Condition: Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Rated Load CH4:Drain Voltage; CH1:Gate Voltage Vp=520V (Vp=600V) Load:0A-2A-0A Freq:1Hz Duty:50% Slew-Rate:0.15A/uS Vo-max=5.50V; Vo-min=3.68V Power MOSFET (Q1) Current Waveform Vin=90Vac, Rated Load Ip=0.732A (Ip=9.6A)
Output Diode (D8) Voltage Waveform Output Diode (D8) Current Waveform Vin=264Vac, Rated Load Vp=37.0V (Vp=45V) 9.2 Transient Condition Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Rated Load, Start up CH4:Drain Voltage; CH1:Gate Voltage Vp=516V (Vp=600V) Vin=90Vac, Rated Load Ip=7.44A (Ip=32A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Rated Load, Start up CH4:Drain Voltage; CH1:Gate Voltage Vp=518V (Vp=600V)
Power MOSFET (Q1) Current Waveform Power MOSFET (Q1) Current Waveform Vin=90Vac, Rated Load, Start up Ip=0.716A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Rated Load, Shut down CH4:Drain Voltage; CH1:Gate Voltage Vp=512V (Vp=600V) Vin=90Vac, Rated Load, Start up Ip=0.728A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Rated Load, Shut down CH4:Drain Voltage; CH1:Gate Voltage Vp=518V (Vp=600V)
Power MOSFET (Q1) Current Waveform Power MOSFET (Q1) Current Waveform Vin=90Vac, Rated Load, Shut down Ip=0.708A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Open Load, Output short circuit during operating CH4:Drain Voltage; CH1:Gate Voltage Vp=446V (Vp=600V) Vin=90Vac, Rated Load, Shut down Ip=0.724A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Open Load, Output short circuit during operating CH4:Drain Voltage; CH1:Gate Voltage Vp=508V (Vp=600V)
Power MOSFET (Q1) Current Waveform Power MOSFET (Q1) Current Waveform Vin=264Vac, Open Load, Output short circuit during operating Ip=0.684A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Output short circuit then Start up CH4:Drain Voltage; CH1:Gate Voltage Vp=408V (Vp=600V) Vin=264Vac, Open Load, Output short circuit during operating Ip=0.708A (Ip=9.6A) Power MOSFET (Q1) Voltage Waveform Vin=264Vac, Output short circuit then Start up CH4:Drain Voltage; CH1:Gate Voltage Vp=512V (Vp=600V)
Power MOSFET (Q1) Current Waveform Power MOSFET (Q1) Current Waveform Vin=264Vac, Output short circuit then Start up Ip=0.648A (Ip=9.6A) Output Diode (D8) Voltage Waveform Vin=264Vac, Rated Load, Start up Vp=36.6V (Vp=45V) Vin=264Vac, Output short circuit then Start up Ip=0.708A (Ip=9.6A) Output Diode (D8) Voltage Waveform Vin=264Vac, Rated Load, Start up Vp=37.2V (Vp=45V)
Output Diode (D8) Voltage Waveform Output Diode (D8) Voltage Waveform Vin=264Vac, Rated Load, Shut down Vp=36.4V (Vp=45V) Output Diode (D8) Voltage Waveform Vin=264Vac, Open Load, Output short circuit during operating Vp=34.0V (Vp=45V) Vin=264Vac, Rated Load, Shut down Vp=37.2V (Vp=45V) Output Diode (D8) Voltage Waveform Vin=264Vac, Open Load, Output short circuit during operating Vp=36.4V (Vp=45V)
Output Diode (D8) Voltage Waveform Output Diode (D8) Voltage Waveform Vin=264Vac, Output short circuit then Start up Vp=31.2V (Vp=45V) 10 温度测试 Item 90Vac Iout=2.0A Vin=264Vac, Output short circuit then Start up Vp=32.0V (Vp=45V) 264Vac Iout=2.0A Temp. ( ) Temp. Rise ( ) Temp. ( ) Temp. Rise ( ) Input Bulk Cap. (C2) 54.3 14.4 53.6 13.7 Power MOSFET (Q1) 66.7 26.8 68.4 28.5 Transformer Core (TC) 66.7 26.8 68.7 28.8 Transformer Winding (TW) 72.1 32.2 73.6 33.7 Output Cap. (C6) 65.4 25.5 65.9 26.0 Output Diode (D8) 87.1 47.2 87.7 47.8 Ambient 39.9 39.9
11 EMI 测试 Vin=120Vac Channel L:
Vin=120Vac Channel N:
Vin=230Vac Channel L:
Vin=230Vac Channel N: