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1 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 V Output Current Iout / 2.0 / A Over Current Protection Output Ripple Voltage Ambient Temperature Iout-max / / A Auto-restart Vripple / / 120 mv Tamb 0 / 45 Measured at the end of PCB Vin=115Vac and 230Vac
2 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 输入 - 输出特性曲线图示 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
3 1 电路原理图
4 2 PCB 版图 PCB 整体布局图示 PCB 顶层布局图示
5 PCB 底层布局图示
6 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 C5 贴片陶瓷电容 4.7nF/630V X7R 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 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% R3 厚膜贴片电阻 82K ±5% R4 厚膜贴片电阻 43K ±1% R5 厚膜贴片电阻 12K ±1% R6,R8 厚膜贴片电阻 Open -- 0 R7 厚膜贴片电阻 10R ±5% R9,R10,R11 厚膜贴片电阻 2R4 ±5% R12 厚膜贴片电阻 150K ±5% R13 厚膜贴片电阻 150R ±5% R14 厚膜贴片电阻 330R ±5% R15 厚膜贴片电阻 1.2K ±5% R16 厚膜贴片电阻 4R7 ±5% 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 LL A/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 U1 电源驱动 IC FT838D SOT23-5 1
7 4 变压器 共模电感制作图 变压器制作图
8 辉芒微电子 ( 深圳 ) 有限公司 Fremont Micro Devices Co., Ltd. 共模电感制作图
9 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) (%) (%) / 5.13 / / 5.12 / / 5.11 / / 5.11 / *Note: DC-Cable: Rcable=150mΩ OCP tested condition: CV=2.5V (ma) 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.
10 6 特性曲线测试 输入 - 输出特性曲线测试 Vout(V) 输出 V-I 特性曲线测试 Vout(V) Vin (Vac) 115Vac 230Vac Open Load Rated Load Vin (Vac)
11 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
12 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
13 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)
14 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)
15 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)
16 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)
17 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)
18 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)
19 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)
20 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) Power MOSFET (Q1) Transformer Core (TC) Transformer Winding (TW) Output Cap. (C6) Output Diode (D8) Ambient
21 11 EMI 测试 Vin=120Vac Channel L:
22 Vin=120Vac Channel N:
23 Vin=230Vac Channel L:
24 Vin=230Vac Channel N:
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