graph TB
subgraph "高压输入防护电路"
A["AC/DC高压输入 \n 380-400V"] --> B["气体放电管/压敏电阻"]
B --> C["共模电感 \n EMI滤波"]
C --> D["X/Y电容网络"]
D --> E["整流桥/直流母线"]
end
subgraph "辅助电源启动与转换"
E --> F["启动电阻"]
F --> G["VBI165R01 \n 启动开关"]
G --> H["高频变压器初级"]
H --> I["反激控制器"]
I --> J["栅极驱动"]
J --> G
subgraph "辅助电源输出"
K["变压器次级1 \n 12V输出"]
L["变压器次级2 \n 5V输出"]
end
K --> M["12V整流滤波"]
L --> N["5V整流滤波"]
M --> O["12V辅助电源"]
N --> P["5V辅助电源"]
O --> Q["控制电路供电"]
P --> R["逻辑电路供电"]
end
style G fill:#fff3e0,stroke:#ff9800,stroke-width:2px
主DC-DC同步降压转换拓扑详图
graph LR
subgraph "同步降压功率级"
A["48V/24V输入"] --> B["输入电容"]
B --> C["VBQF1102N \n 上管"]
C --> D["开关节点"]
D --> E["功率电感"]
E --> F["输出电容"]
F --> G["12V输出"]
D --> H["VBQF1102N \n 下管"]
H --> I["功率地"]
end
subgraph "控制与驱动"
J["同步降压控制器"] --> K["上管驱动器"]
J --> L["下管驱动器"]
K --> C
L --> H
M["电压反馈"] --> J
N["电流检测"] --> J
O["温度监控"] --> J
end
subgraph "负载点转换"
G --> P["12V负载点"]
G --> Q["5V LDO"]
P --> R["边缘计算单元"]
Q --> S["GNSS模块"]
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
数据接口保护与电平转换拓扑详图
graph TB
subgraph "CAN总线接口保护"
A["车辆CAN_H"] --> B["TVS管阵列"]
A --> C["VBKB5245 \n N-MOS通道"]
D["车辆CAN_L"] --> E["TVS管阵列"]
D --> F["VBKB5245 \n P-MOS通道"]
subgraph "电平转换与隔离"
G["CAN收发器"] --> H["数字隔离器"]
H --> I["MCU CAN接口"]
end
C --> G
F --> G
J["MCU GPIO"] --> K["逻辑电平转换"]
K --> L["VBKB5245栅极控制"]
end
subgraph "RS-485/232接口保护"
M["RS-485 A线"] --> N["自恢复保险丝"]
M --> O["VBKB5245开关"]
P["RS-485 B线"] --> Q["自恢复保险丝"]
P --> R["VBKB5245开关"]
O --> S["RS-485收发器"]
R --> S
S --> T["MCU UART"]
U["RS-232 TX"] --> V["VBKB5245开关"]
W["RS-232 RX"] --> X["VBKB5245开关"]
V --> Y["RS-232收发器"]
X --> Y
Y --> Z["MCU UART"]
end
subgraph "智能开关控制"
AA["故障检测电路"] --> BB["比较器"]
BB --> CC["故障锁存"]
CC --> DD["关断信号"]
DD --> L
DD --> O
DD --> R
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style O fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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