graph TB
subgraph "LLC谐振网络"
A["高压母线(400VDC)"] --> B["谐振电感Lr"]
B --> C["谐振电容Cr"]
C --> D["变压器励磁电感Lm"]
D --> E["变压器初级"]
end
subgraph "LLC初级开关桥"
F["上桥开关节点"] --> G["VBQF1154N \n Q1"]
H["下桥开关节点"] --> I["VBQF1154N \n Q2"]
G --> J["初级地"]
I --> J
E --> F
E --> H
end
subgraph "同步整流次级"
K["变压器次级"] --> L["同步整流节点"]
L --> M["VBGQF1610 \n SR1"]
L --> N["VBGQF1610 \n SR2"]
M --> O["输出滤波电感"]
N --> P["输出地"]
O --> Q["输出电容"]
Q --> R["直流输出"]
end
subgraph "控制与驱动"
S["LLC控制器"] --> T["半桥栅极驱动器"]
T --> G
T --> I
U["同步整流控制器"] --> V["同步整流驱动器"]
V --> M
V --> N
end
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style M fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
辅助电源与智能负载管理拓扑详图
graph LR
subgraph "辅助反激电源"
A["高压母线"] --> B["反激变压器初级"]
B --> C["VBK5213N \n 开关管"]
C --> D["初级地"]
E["反激控制器"] --> F["栅极驱动"]
F --> C
subgraph "次级输出"
G["变压器次级"] --> H["整流滤波"]
H --> I["5V辅助电源"]
H --> J["3.3V辅助电源"]
end
end
subgraph "智能负载开关控制"
K["主控MCU"] --> L["GPIO控制"]
L --> M["电平转换"]
M --> N["VBQF1320 \n 栅极"]
O["12V主输出"] --> P["VBQF1320 \n 源极"]
N --> Q["VBQF1320 \n 漏极"]
Q --> R["负载输出"]
S["状态反馈"] --> K
end
subgraph "通信接口"
T["MCU通信接口"] --> U["I2C/PMBus"]
T --> V["协议通信"]
V --> W["投影仪主机"]
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style N fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与保护电路拓扑详图
graph TB
subgraph "三级散热结构"
A["一级: PCB敷铜散热"] --> B["同步整流MOSFET"]
subgraph "热传递路径"
C["底部散热焊盘"] --> D["散热过孔阵列"]
D --> E["内层铜箔"]
E --> F["外壳导热界面"]
F --> G["金属外壳"]
end
H["二级: 导热硅胶"] --> I["LLC初级MOSFET"]
J["三级: 空气对流"] --> K["整体适配器"]
end
subgraph "温度监测网络"
L["MOSFET温度传感器"] --> M["PCB温度传感器"]
M --> N["外壳温度传感器"]
N --> O["MCU ADC"]
O --> P["温度保护逻辑"]
P --> Q["降频/关断"]
end
subgraph "电气保护网络"
R["RCD缓冲网络"] --> S["LLC初级开关管"]
T["RC吸收电路"] --> U["同步整流管"]
V["TVS阵列"] --> W["栅极驱动芯片"]
X["电流检测电路"] --> Y["过流比较器"]
Y --> Z["故障锁存器"]
Z --> S
Z --> U
end
subgraph "EMC设计"
AA["共模电感"] --> AB["X电容"]
AC["三明治绕法变压器"] --> AD["屏蔽层"]
AE["开关节点净空"] --> AF["辐射抑制"]
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style I fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style S fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
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