graph LR
subgraph "输入保护电路"
A["工业宽压输入 \n 12-36V DC"] --> B["TVS阵列 \n 吸收浪涌能量"]
B --> C["π型EMI滤波器"]
C --> D["输入电容"]
D --> E["防反接保护"]
E --> F["VBQF1252M \n 输入主开关"]
F --> G["电流检测电阻"]
G --> H["输出电容"]
H --> I["高压直流母线"]
J["保护控制IC"] --> K["故障检测"]
K --> L["栅极驱动器"]
L --> F
subgraph "保护功能"
M["过压保护(OVP)"]
N["过流保护(OCP)"]
O["过温保护(OTP)"]
end
M --> J
N --> J
O --> J
I -->|电压反馈| J
G -->|电流反馈| J
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
核心电源转换拓扑详图
graph TB
subgraph "同步Buck转换器"
A["输入12V/24V"] --> B["输入滤波"]
B --> C["上管MOSFET"]
C --> D["开关节点"]
D --> E["VBC1307 \n 同步整流管"]
E --> F["地"]
D --> G["功率电感"]
G --> H["输出滤波电容"]
H --> I["核心电压输出 \n 3.3V/5V"]
subgraph "控制环路"
J["Buck控制器"] --> K["PWM信号"]
K --> L["上管驱动器"]
L --> C
J --> M["互补PWM"]
M --> N["下管驱动器"]
N --> E
I -->|电压反馈| J
O["电流检测"] -->|电流反馈| J
end
subgraph "PCB热设计"
P["大面积接地铜箔"] --> E
Q["过孔散热阵列"] --> P
R["顶部散热焊盘"] --> E
end
end
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
多路负载智能管理拓扑详图
graph TB
subgraph "双通道负载开关配置"
A["MCU GPIO"] --> B["电平转换器 \n 3.3V to 5V"]
B --> C["通道1控制"]
B --> D["通道2控制"]
subgraph "VBBC3210双N沟道MOSFET"
direction LR
E["通道1: 栅极"]
F["通道1: 漏极"]
G["通道1: 源极"]
H["通道2: 栅极"]
I["通道2: 漏极"]
J["通道2: 源极"]
end
C --> E
D --> H
F --> K["3.3V/5V电源"]
I --> K
G --> L["负载1供电输出"]
J --> M["负载2供电输出"]
L --> N["传感器组1"]
M --> O["通信模块"]
N --> P["地"]
O --> P
end
subgraph "智能配电策略"
Q["MCU功耗管理"] --> R["负载优先级"]
R --> S["时序控制"]
S --> T["通道1: 先上电"]
S --> U["通道2: 延迟上电"]
V["休眠策略"] --> W["非活跃通道关断"]
W --> X["降低静态电流"]
Y["故障隔离"] --> Z["故障通道独立关断"]
end
subgraph "保护电路"
A1["软启动电路"] --> B1["抑制浪涌电流"]
C1["续流二极管"] --> D1["感性负载保护"]
E1["过流检测"] --> F1["快速关断"]
G1["热插拔保护"] --> H1["ESD防护"]
end
style E fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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