graph LR
subgraph "PWM驱动与栅极控制"
A[MCU PWM输出] --> B[电平转换]
B --> C[栅极驱动IC]
C --> D["VBGQF1102N \n 栅极"]
end
subgraph "主功率路径"
E[VCC_MAIN 3.7V] --> F["VBGQF1102N \n 漏极"]
D --> G["VBGQF1102N \n 源极"]
G --> H[振动电机]
H --> I[电流采样电阻]
I --> J[GND]
K[RC缓冲电路] --> H
end
subgraph "电流检测与保护"
I --> L[差分放大器]
L --> M[MCU ADC]
N[比较器] --> O[快速关断]
O --> C
M --> P[软件保护]
P --> A
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
智能负载管理拓扑详图
graph TB
subgraph "双路负载开关控制"
A[MCU GPIO1] --> B[电平转换]
B --> C["VB3420 Ch1栅极"]
A2[MCU GPIO2] --> B2[电平转换]
B2 --> C2["VB3420 Ch2栅极"]
end
subgraph "通道1: 充电管理与LED控制"
D[VCC_MAIN] --> E["VB3420 Ch1漏极"]
C --> F["VB3420 Ch1源极"]
F --> G[充电管理电路]
G --> H[锂电池]
F --> I[LED驱动电路]
I --> J[RGB LED阵列]
end
subgraph "通道2: 传感器供电"
K[VCC_MAIN] --> L["VB3420 Ch2漏极"]
C2 --> M["VB3420 Ch2源极"]
M --> N[传感器供电网络]
N --> O[压力传感器]
N --> P[姿态传感器]
N --> Q[触摸传感器]
O --> R[MCU ADC]
P --> S[MCU I2C]
Q --> T[MCU GPIO]
end
subgraph "安全互锁逻辑"
U[充电检测] --> V[逻辑控制器]
V --> A
V --> A2
W[故障信号] --> V
end
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style L fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
热管理与保护电路拓扑详图
graph LR
subgraph "三级散热系统"
A["一级散热: 热焊盘"] --> B["VBGQF1102N \n 底部焊盘"]
C["过孔阵列"] --> D["内层接地铜箔"]
E["二级散热: 敷铜"] --> F["VB3420周边"]
G["三级散热: 布局"] --> H["信号器件间距"]
I[温度传感器] --> J[MCU]
J --> K[动态功率调整]
K --> L[PWM占空比]
end
subgraph "电气保护网络"
M["π型滤波器"] --> N["充电输入"]
O["TVS管"] --> P["电源入口"]
Q["RC缓冲"] --> R["电机端子"]
S["肖特基二极管"] --> T["电感负载"]
U["ESD保护"] --> V["通信接口"]
W["液态检测"] --> X["充电触点"]
end
subgraph "故障诊断机制"
Y[电流采样] --> Z[过流比较器]
AA[电压监测] --> AB[欠压/过压检测]
AC[NTC测温] --> AD[过温保护]
Z --> AE[故障锁存]
AB --> AE
AD --> AE
AE --> AF[全局关断]
AF --> AG[所有MOSFET栅极]
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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