graph LR
subgraph "12V总线主开关"
A[12V输入] --> B[VBQF1303 \n 30V/60A/3.9mΩ]
B --> C[12V分配总线]
D[MCU GPIO] --> E[驱动电路]
E --> F[栅极控制]
F --> B
C -->|电流检测| G[采样电阻]
G --> H[比较器]
H --> I[过流保护]
I --> J[关断信号]
J --> F
end
subgraph "同步降压整流"
C --> K[降压控制器]
K --> L[上管驱动]
K --> M[下管驱动]
subgraph "同步整流下管"
N[VBQF1303 \n 同步整流管]
end
M --> N
N --> O[5V输出]
O --> P[LC滤波器]
P --> Q[传感器供电]
end
subgraph "散热设计"
R[PCB散热焊盘] --> B
R --> N
S[多层过孔阵列] --> R
T[背面铜箔] --> S
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style N fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
H桥电机驱动与电平转换拓扑详图
graph TB
subgraph "H桥摆风电机驱动"
A[12V电源] --> B[H桥电路]
subgraph "上管/下管对"
C["VBQG5325 \n (N沟道18mΩ)"]
D["VBQG5325 \n (P沟道32mΩ)"]
E["VBQG5325 \n (N沟道18mΩ)"]
F["VBQG5325 \n (P沟道32mΩ)"]
end
B --> C
B --> D
B --> E
B --> F
C --> G[电机正端]
D --> G
E --> H[电机负端]
F --> H
G --> I[摆风电机]
H --> I
J[MCU PWM] --> K[预驱IC]
K --> L[死区控制]
L --> M[栅极驱动]
M --> C
M --> D
M --> E
M --> F
end
subgraph "电平转换应用"
N[5V MCU] --> O[I2C信号]
subgraph "电平转换器"
P[VBQG5325 \n N+P对]
end
O --> P
P --> Q[3.3V传感器]
R[续流二极管] --> I
end
subgraph "保护电路"
S[TVS阵列] --> C
S --> D
T[电流采样] --> U[比较器]
U --> V[过流保护]
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style P fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
多路负载开关管理拓扑详图
graph LR
subgraph "双路风扇控制"
A[MCU GPIO1] --> B[电平转换]
B --> C["VBQD3222U \n 通道1 \n 20V/6A/22mΩ"]
D[MCU GPIO2] --> E[电平转换]
E --> F["VBQD3222U \n 通道2 \n 20V/6A/22mΩ"]
G[12V电源] --> H[公共漏极]
H --> C
H --> F
C --> I[风扇1]
F --> J[风扇2]
I --> K[地]
J --> K
end
subgraph "离子发生器控制"
L[MCU GPIO3] --> M[驱动电阻]
M --> N["VBQD3222U \n 离子发生器开关"]
O[12V电源] --> P[离子发生器]
N --> P
P --> Q[高压模块]
Q --> R[地]
end
subgraph "UV LED控制"
S[MCU GPIO4] --> T[电平转换]
T --> U["VBQG5325 \n UV LED开关"]
V[12V电源] --> W[UV LED阵列]
U --> W
W --> X[限流电阻]
X --> Y[地]
end
subgraph "栅极保护与布局"
Z[栅极串联电阻] --> C
Z --> F
AA[GS并联电阻] --> C
AA --> F
BB[对称布局] --> CC[最小回路面积]
DD[敷铜散热] --> C
DD --> F
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style F fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style N fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style U fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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