graph LR
subgraph "高效率降压转换器"
A["24V/48V输入"] --> B["输入滤波电容"]
B --> C["TVS保护"]
C --> D["VBGQF1302 \n 主开关管"]
D --> E["功率电感"]
E --> F["输出滤波电容"]
F --> G["核心电压输出 \n (3.3V/5V/12V)"]
H["数字PWM控制器"] --> I["栅极驱动器"]
I --> D
subgraph "反馈与控制"
J["电压采样"] --> K["误差放大器"]
K --> L["数字补偿器"]
L --> H
M["电流采样"] --> N["过流保护"]
N --> H
end
subgraph "PCB热管理"
O["散热焊盘"] --> P["散热过孔"]
P --> Q["内层铜箔"]
R["顶层敷铜"] --> S["热量扩散区"]
end
D --> O
D --> R
style D fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
end
智能负载管理拓扑详图
graph TB
subgraph "多路负载智能开关系统"
A["MCU GPIO控制"] --> B["电平转换电路"]
B --> C["VBQF2625 \n 传感器1开关"]
B --> D["VBQF2625 \n 传感器2开关"]
B --> E["VBQF2625 \n 通信模块开关"]
B --> F["VBQF2625 \n 备份系统开关"]
C --> G["激光雷达 \n 20V/2A"]
D --> H["多光谱传感器 \n 12V/1.5A"]
E --> I["5G模块 \n 3.8V/3A"]
F --> J["备份存储 \n 5V/0.5A"]
subgraph "状态监控与保护"
K["电流检测"] --> L["过流比较器"]
M["温度检测"] --> N["过温保护"]
O["开关时序控制"] --> P["状态记录"]
end
G --> K
H --> K
I --> K
J --> K
C --> M
D --> M
E --> M
F --> M
L --> Q["故障锁存"]
N --> Q
Q --> R["紧急关断"]
R --> C
R --> D
R --> E
R --> F
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
高压防护与热管理拓扑详图
graph LR
subgraph "高压输入防护与隔离"
A["机载电源输入"] --> B["保险丝"]
B --> C["输入滤波器"]
C --> D["VBI2102M \n 主防护开关"]
D --> E["主电源总线"]
subgraph "冗余路径"
F["VBI2102M \n 冗余切换开关"]
G["备份电池"]
end
E --> F
G --> F
F --> H["冗余电源总线"]
subgraph "接口保护"
I["TVS阵列"] --> J["RS-485接口"]
K["ESD防护"] --> L["UART接口"]
M["CAN总线保护"] --> N["CAN收发器"]
end
E --> I
E --> K
E --> M
end
subgraph "三级热管理架构"
subgraph "一级：PCB级散热"
O["VBGQF1302"] --> P["DFN8散热焊盘"]
P --> Q["散热过孔阵列"]
Q --> R["内层铜箔"]
end
subgraph "二级：布局级散热"
S["VBQF2625阵列"] --> T["大面积敷铜"]
U["高热元件"] --> V["间距优化"]
W["发热元件"] --> X["气流通道"]
end
subgraph "三级：系统级散热"
Y["机壳设计"] --> Z["通风口"]
AA["环境温度"] --> AB["自然对流"]
AC["强制风冷"] --> AD["风扇控制"]
end
O --> P
S --> T
Y --> Z
AD --> AC
end
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style F fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style O fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
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