IS215UCVEH2A 工控备件机器人模块
布局注意事项
高频谐振问题为了最大效率，LT1370开关上升和下降时间尽可能短。为了防止辐射和高频谐振问题，连接到开关节点的部件的正确布局至关重要。通过保持输出二极管、开关引脚和输出旁路电容器引线尽可能短，B场（磁）辐射最小化。图3显示了这些组件的建议位置。通过最小化连接到开关管脚的所有迹线的长度和面积，E场辐射保持低。切换器电路下方应始终使用接地平面，以防止平面间耦合。高速开关电流路径如图4所示。该路径中的最小引线长度对于确保清洁开关和低EMI至关重要。包括开关、输出二极管和输出电容器的路径是唯一包含纳秒上升和下降时间的路径。保持这条路径尽可能短。
降压开关稳压
在SO-8封装LT1376 500kHz 1.5A降压开关调节器使用4.7µH电感器LT1512 500kHz 1.5 A SEPIC电池充电器输入电压可能大于或小于电池电压LT1513 500kHz 3A SEPIC电池充电器输入电压可以大于或小于电池电压相关零件线性技术公司1630 McCarthy Blvd.注19.线性技术还提供了一个计算机软件程序SwitcherCADTM，以帮助设计开关转换器。此外，我们的应用部门随时准备伸出援手。图4负载VOUT L1开关节点LT1370•F04 VIN高频循环路径VIN FB GND NFB VC S/S VSW C D保持路径远离VSW、输出二极管、输出电容器和接地回路尽可能短12 LT1370 sn1370 1370fs典型应用带直接反馈的NU正负转换器
Layout Considerations
High frequency resonance problem For maximum efficiency, the rise and fall time of LT1370 switch should be as short as possible. In order to prevent radiation and high-frequency resonance problems, the correct layout of components connected to the switch node is essential. The B field (magnetic) radiation is minimized by keeping the output diodes, switch pins, and output bypass capacitor leads as short as possible. Figure 3 shows the recommended locations for these components. E field radiation is kept low by minimizing the length and area of all traces connected to the switch pins. The grounding plane shall always be used below the switch circuit to prevent coupling between planes. High speed switch current path is shown in Figure 4. The minimum lead length in this path is critical to ensure clean switches and low EMI. The path including switch, output diode and output capacitor is the only path containing nanosecond rise and fall time. Keep this path as short as possible.
Voltage stabilization of step-down switch
The SO-8 packaged LT1376 500kHz 1.5A step-down switch regulator uses 4.7 µ H inductor LT1512 500kHz 1.5 A SEPIC battery charger input voltage may be greater than or less than the battery voltage LT1513 500kHz 3A SEPIC battery charger input voltage may be greater than or less than the battery voltage related parts Linear Technology Company 1630 McCarthy Blvd. Note 19. Linear Technology also provides a computer software program SwitcherCADTM to help design the switch converter. In addition, our application department is ready to lend a helping hand. Fig. 4 Load VOUT L1 switch node LT1370 • F04 VIN High frequency cycle path VIN FB GND NFB VC S/S VSW C D Keep the path away from VSW, output diode, output capacitor and ground loop as short as possible 12 LT1370 sn1370 1370fs Typical application NU positive negative converter with direct feedback
