graph LR
subgraph "EMI滤波与输入保护"
A["交流输入 \n 90-264VAC"] --> B["保险丝"]
B --> C["MOV阵列 \n 浪涌保护"]
C --> D["共模电感"]
D --> E["X电容"]
E --> F["整流桥"]
end
subgraph "PFC升压变换"
F --> G["PFC升压电感"]
G --> H["PFC开关节点"]
H --> I["VBP18R20SFD \n 800V/20A"]
I --> J["高压母线电容 \n ~400VDC"]
K["PFC控制器"] --> L["栅极驱动器"]
L --> I
J -->|电压反馈| K
end
subgraph "保护电路"
M["RCD缓冲网络"] --> I
N["电流检测电阻"] --> K
O["过压保护"] --> K
end
style I fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
DC-DC变换与同步整流拓扑图
graph TB
subgraph "反激式主变换"
A["高压母线 \n ~400VDC"] --> B["高频变压器 \n 初级"]
B --> C["主开关节点"]
C --> D["VBQF1310 \n 主开关管"]
D --> E["初级地"]
F["PWM控制器"] --> G["栅极驱动器"]
G --> D
end
subgraph "同步整流输出"
H["变压器次级"] --> I["同步整流节点"]
I --> J["VBQF1310 \n 同步整流管"]
J --> K["输出滤波电感"]
K --> L["输出滤波电容"]
L --> M["12VDC输出"]
N["同步整流控制器"] --> O["栅极驱动器"]
O --> J
end
subgraph "输出保护"
P["输出过压保护"] --> F
Q["输出过流保护"] --> F
R["VDS吸收电路"] --> D
S["肖特基二极管"] --> J
end
subgraph "辅助电源"
T["辅助绕组"] --> U["整流二极管"]
U --> V["滤波电容"]
V --> W["12V辅助电源"]
W --> X["LDO稳压器"]
X --> Y["5V逻辑电源"]
end
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style J fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
热管理与智能控制拓扑图
graph LR
subgraph "三级热管理系统"
A["一级散热:散热片"] --> B["VBP18R20SFD(TO-247)"]
C["二级散热:PCB铺铜"] --> D["VBQF1310(DFN8)"]
C --> E["VBQF1310(同步整流)"]
F["三级散热:自然对流"] --> G["VBTA8338(SC75-6)"]
H["温度传感器1"] --> I["MCU"]
J["温度传感器2"] --> I
I --> K["PWM控制"]
K --> L["散热风扇(可选)"]
end
subgraph "智能电源管理"
M["MCU"] --> N["VBTA8338 \n 待机开关"]
N --> O["待机电路"]
P["5V逻辑电源"] --> M
M --> Q["状态指示LED"]
M --> R["通信接口"]
R --> S["主机通信"]
end
subgraph "保护网络"
T["输入浪涌保护"] --> U["MOV阵列"]
V["开关节点保护"] --> W["RCD缓冲"]
X["栅极驱动保护"] --> Y["TVS阵列"]
Z["输出短路保护"] --> AA["快速比较器"]
AA --> AB["故障锁存"]
AB --> AC["关断信号"]
AC --> D
AC --> E
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style G fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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