graph LR
subgraph "主电源输入与保护"
A["24V医疗级输入"] --> B[EMI滤波器]
B --> C[输入TVS保护]
C --> D[防反接电路]
D --> E["VBGQF1402主开关"]
end
subgraph "同步Buck转换器"
E --> F[功率电感]
F --> G[输出电容]
G --> H["1.2V核心电压"]
E --> I["VBGQF1402同步整流"]
I --> J[功率地]
K[同步Buck控制器] --> L[栅极驱动器]
L --> E
L --> I
M[电压反馈] --> K
end
subgraph "多路LDO电源"
H --> N["1.2V LDO"] --> O["DDR4内存电源"]
H --> P["1.8V LDO"] --> Q["FPGA I/O电源"]
H --> R["3.3V LDO"] --> S["外设接口电源"]
end
subgraph "热管理设计"
T["主MOSFET散热"] --> E
U["PCB敷铜散热"] --> E
V["温度传感器"] --> W[热管理IC]
W --> X[风扇控制]
X --> Y[系统风扇]
end
style E fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style I fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
多路传感器电源管理拓扑详图
graph TB
subgraph "双通道负载开关配置"
A["MCU GPIO控制"] --> B[电平转换电路]
B --> C["VBQF3307通道1栅极"]
B --> D["VBQF3307通道2栅极"]
E["24V输入电源"] --> F["VBQF3307漏极1"]
E --> G["VBQF3307漏极2"]
subgraph "VBQF3307内部结构"
direction LR
CH1_GATE[栅极1]
CH1_SOURCE[源极1]
CH1_DRAIN[漏极1]
CH2_GATE[栅极2]
CH2_SOURCE[源极2]
CH2_DRAIN[漏极2]
end
C --> CH1_GATE
D --> CH2_GATE
F --> CH1_DRAIN
G --> CH2_DRAIN
CH1_SOURCE --> H["生物传感器电源"]
CH2_SOURCE --> I["环境传感器电源"]
end
subgraph "多路扩展配置"
J["第二颗VBQF3307"] --> K["IMU传感器电源"]
J --> L["摄像头电源"]
M["第三颗VBQF3307"] --> N["USB集线器电源"]
M --> O["通信模块电源"]
P[GPIO扩展器] --> Q[驱动缓冲器]
Q --> J
Q --> M
end
subgraph "保护与滤波"
H --> R[电流检测电阻]
R --> S[过流比较器]
S --> T[故障指示]
H --> U[输出TVS保护]
H --> V[滤波电容]
I --> W[磁珠滤波]
I --> X[去耦电容]
end
subgraph "时序控制"
Y["电源时序控制器"] --> Z[上电序列]
Z --> A1["传感器1上电"]
Z --> B1["传感器2上电"]
Z --> C1["接口上电"]
D1["看门狗电路"] --> E1[MCU复位]
end
style CH1_GATE fill:#e3f2fd,stroke:#2196f3,stroke-width:1px
style CH2_GATE fill:#e3f2fd,stroke:#2196f3,stroke-width:1px
隔离通信与高压驱动拓扑详图
graph LR
subgraph "隔离DC-DC电源设计"
A["24V非隔离侧"] --> B["VBR165R01开关管"]
B --> C[高频变压器初级]
C --> D[初级地]
E[PWM控制器] --> F[隔离驱动器]
F --> B
subgraph "次级隔离输出"
G[变压器次级] --> H[整流滤波]
H --> I["5V隔离电源"]
H --> J["3.3V隔离电源"]
end
I --> K["RS-485隔离接口"]
J --> L["CAN隔离收发器"]
end
subgraph "高压侧保护设计"
M["650V耐压裕量"] --> N[电压裕度分析]
O["爬电距离设计"] --> P[TO92封装优势]
Q["RCD缓冲电路"] --> B
R["栅极保护TVS"] --> B
S["源极串联电阻"] --> B
end
subgraph "通信接口保护"
K --> T["RS-485 TVS阵列"]
K --> U["共模扼流圈"]
L --> V["CAN总线保护"]
L --> W["隔离屏障"]
X["以太网隔离"] --> Y["以太网变压器"]
Y --> Z["PHY芯片保护"]
end
subgraph "安全与监控"
A1["隔离电压监控"] --> B1[ADC采样]
C1["漏电流检测"] --> D1[安全控制器]
E1["绝缘电阻监测"] --> F1[报警输出]
G1["看门狗定时器"] --> H1[系统复位]
end
style B fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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