graph LR
subgraph "高压输入处理"
A["高压直流输入 \n 250-800VDC"] --> B["EMI滤波器"]
B --> C["MOV浪涌保护"]
C --> D["RC缓冲网络"]
D --> E["输入电容组"]
end
subgraph "主DC-DC变换级"
E --> F["VBL19R15S \n 高压MOSFET"]
F --> G["高频变压器"]
G --> H["同步整流器"]
H --> I["输出滤波"]
I --> J["低压直流输出 \n 12V/5V/3.3V"]
K["PWM控制器"] --> L["栅极驱动器"]
L --> F
J -->|电压反馈| K
end
subgraph "保护电路"
M["主动钳位电路"] --> F
N["TVS保护阵列"] --> L
O["电流检测"] --> P["比较器"]
P --> Q["保护锁存"]
Q --> R["关断信号"]
R --> L
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
智能负载开关与执行器驱动拓扑
graph TB
subgraph "智能负载开关矩阵"
A["MCU控制信号"] --> B["电平转换器"]
B --> C["VB1240B \n 激光雷达开关"]
B --> D["VB1240B \n 毫米波雷达开关"]
B --> E["VB1240B \n 摄像头开关"]
B --> F["VB1240B \n 域控制器开关"]
G["12V辅助电源"] --> C
G --> D
G --> E
G --> F
C --> H["激光雷达供电"]
D --> I["毫米波雷达供电"]
E --> J["摄像头供电"]
F --> K["域控制器供电"]
H --> L["GND"]
I --> L
J --> L
K --> L
end
subgraph "执行器驱动通道"
M["PWM控制信号"] --> N["驱动缓冲器"]
N --> O["VBGJ1108N \n 冷却泵驱动"]
N --> P["VBGJ1108N \n 主风扇驱动"]
N --> Q["VBGJ1108N \n 辅助风扇驱动"]
R["12V电源"] --> O
R --> P
R --> Q
O --> S["液冷泵负载"]
P --> T["主散热风扇"]
Q --> U["辅助散热风扇"]
S --> V["GND"]
T --> V
U --> V
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style O fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与可靠性增强拓扑
graph LR
subgraph "三级热管理架构"
A["一级: 液冷板散热"] --> B["VBL19R15S MOSFET"]
C["二级: 强制风冷散热"] --> D["VBGJ1108N MOSFETs"]
E["三级: PCB导热设计"] --> F["VB1240B负载开关"]
G["NTC温度传感器"] --> H["MCU温度监测"]
H --> I["PWM控制算法"]
I --> J["液冷泵速度控制"]
I --> K["风扇速度控制"]
J --> L["液冷泵"]
K --> M["散热风扇"]
end
subgraph "可靠性增强设计"
N["输入浪涌保护"] --> O["MOV+RC组合"]
P["开关节点保护"] --> Q["RC吸收网络"]
R["栅极驱动保护"] --> S["TVS阵列"]
T["负载端保护"] --> U["TVS+续流二极管"]
V["电流检测网络"] --> W["精密采样电阻"]
W --> X["高速比较器"]
X --> Y["故障锁存"]
Y --> Z["系统关断"]
Z --> B
Z --> D
end
subgraph "故障诊断机制"
AA["过流检测"] --> AB["<1μs快速关断"]
AC["过温检测"] --> AD["NTC温度监控"]
AE["负载状态监测"] --> AF["短路/开路诊断"]
AF --> AG["健康管理系统"]
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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