graph LR
subgraph "气泵电机驱动电路"
A["VDD_5V(5V电源)"] --> B["电机驱动IC"]
C["MCU PWM信号"] --> B
B --> D["栅极驱动"]
D --> E["VBQF1303 \n N-MOSFET"]
F["VBAT(3.7V-5V)"] --> G["气泵电机"]
E --> G
G --> H["电机地"]
E --> H
subgraph "保护电路"
I["续流二极管"] --> E
J["RC吸收电路"] --> E
K["电流检测电阻"] --> H
K --> L["过流保护电路"]
L --> M["故障信号"]
M --> C
end
subgraph "热管理"
N["DFN8底部散热焊盘"] --> O["PCB大面积敷铜"]
O --> P["自然散热"]
end
end
style E fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
泄气阀控制与电源管理拓扑详图
graph TB
subgraph "泄气阀高侧控制"
A["MCU GPIO"] --> B["限流电阻"]
B --> C["VB2470栅极"]
D["VDD_5V(5V电源)"] --> E["泄气阀电磁铁"]
C --> F["VB2470源极"]
F --> E
E --> G["地"]
H["VB2470漏极"] --> G
subgraph "保护电路"
I["栅极对地稳压管"] --> C
J["反向电动势吸收"] --> E
end
end
subgraph "双路电源智能管理"
K["MCU GPIO1"] --> L["电平转换电路"]
K["MCU GPIO2"] --> L
L --> M["VB4290A栅极控制"]
subgraph "VB4290A双P-MOS"
direction LR
N["CH1: 显示屏供电"]
O["CH2: 蓝牙供电"]
end
M --> N
M --> O
P["VDD_5V(5V电源)"] --> Q["VB4290A漏极1"]
P --> R["VB4290A漏极2"]
Q --> N
R --> O
N --> S["OLED显示屏"]
O --> T["蓝牙模块"]
S --> U["地"]
T --> U
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style N fill:#fff3e0,stroke:#ff9800,stroke-width:2px
保护与热管理拓扑详图
graph LR
subgraph "三级热管理架构"
A["一级: 气泵驱动MOSFET"] --> B["DFN8底部散热焊盘 \n 连接大面积敷铜"]
C["二级: 泄气阀控制MOSFET"] --> D["SOT23-3封装 \n PCB敷铜散热"]
E["三级: 电源管理MOSFET"] --> F["SOT23-6封装 \n PCB敷铜散热"]
B --> G["自然对流散热"]
D --> G
F --> G
end
subgraph "EMC抑制与保护网络"
subgraph "气泵驱动回路保护"
H["RC吸收电路"] --> I["VBQF1303漏-源极"]
J["续流二极管"] --> I
K["电流检测"] --> L["过流比较器"]
L --> M["故障锁存"]
M --> N["PWM关断"]
end
subgraph "泄气阀回路保护"
O["反向电动势吸收"] --> P["泄气阀线圈"]
Q["栅极ESD保护"] --> R["VB2470栅极"]
end
subgraph "电源管理保护"
S["输入过压保护"] --> T["VB4290A输入"]
U["负载短路保护"] --> V["VB4290A输出"]
end
end
subgraph "系统级可靠性增强"
W["所有MOSFET栅极串联电阻"] --> X["防振荡"]
Y["电源路径TVS阵列"] --> Z["防浪涌"]
AA["电池电压监测"] --> AB["低电量保护"]
AC["看门狗电路"] --> AD["系统复位"]
end
style I fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style R fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style T fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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