graph LR
subgraph "反激变换器电路"
A["AC 220V输入"] --> B[EMI滤波器]
B --> C[整流桥]
C --> D["高压DC总线 \n ~300VDC"]
D --> E[变压器初级]
E --> F["VBI165R01 \n 650V/1A SOT89"]
F --> G[初级地]
H[PWM控制器] --> I[栅极驱动器]
I --> F
subgraph "辅助电源输出"
J[变压器次级1] --> K[整流二极管]
K --> L[滤波电容]
L --> M["12V辅助电源"]
N[变压器次级2] --> O[整流二极管]
O --> P[滤波电容]
P --> Q["5V数字电源"]
R[变压器次级3] --> S[整流二极管]
S --> T[滤波电容]
T --> U["3.3V MCU电源"]
end
subgraph "反馈控制"
V["输出采样"] --> W[光耦隔离]
W --> H
end
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style M fill:#e3f2fd,stroke:#2196f3,stroke-width:1px
style Q fill:#e3f2fd,stroke:#2196f3,stroke-width:1px
style U fill:#e3f2fd,stroke:#2196f3,stroke-width:1px
加热器PWM控制拓扑详图
graph TB
subgraph "加热器功率控制"
A["12V/24V DC输入"] --> B["输入滤波电容"]
B --> C["VBQF3638 \n 通道1 60V/25A"]
C --> D["PTC加热元件 \n 300-800W"]
D --> E["功率地"]
subgraph "PWM驱动电路"
F[MCU PWM输出] --> G[电平转换]
G --> H[半桥驱动器]
H --> I[栅极电阻]
I --> C
end
subgraph "电流检测与保护"
J["电流采样电阻"] --> K[运放放大]
K --> L[比较器]
L --> M[故障锁存]
M --> N[关断信号]
N --> H
O["NTC温度传感器"] --> P[ADC]
P --> MCU
end
subgraph "水泵驱动通道"
Q["VBQF3638 \n 通道2 60V/25A"] --> R[微型水泵]
R --> S[水泵地]
T[MCU控制] --> U[驱动电路]
U --> Q
end
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style Q fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
全桥电机驱动拓扑详图
graph LR
subgraph "H桥电机驱动电路"
A["12V电源"] --> B["输入滤波"]
B --> C["VBQG5325 \n N+P沟道对"]
subgraph "H桥拓扑"
C -->|高侧P| D["电机正端"]
C -->|低侧N| E["电机负端"]
C -->|高侧N| F["电机正端"]
C -->|低侧P| G["电机负端"]
end
D --> H[磁力搅拌电机]
E --> H
F --> H
G --> H
H --> I[电机地]
subgraph "驱动控制"
J[MCU控制信号] --> K[预驱动芯片]
K --> L["死区控制"]
L --> M[电平转换]
M --> C
end
subgraph "保护电路"
N["TVS阵列"] --> D
N --> E
O["电流检测"] --> P[比较器]
P --> Q[故障输出]
Q --> K
end
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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