graph LR
subgraph "PFC升压级"
A["90-264VAC输入"] --> B["EMI滤波器"]
B --> C["三相整流桥"]
C --> D["PFC升压电感"]
D --> E["PFC开关节点"]
E --> F["VBP165R96SFD \n 650V/96A"]
F --> G["高压直流母线 \n 410-450VDC"]
H["PFC控制器"] --> I["栅极驱动器"]
I --> F
G -->|电压反馈| H
end
subgraph "主电源变换级"
G --> J["主变压器初级"]
J --> K["主开关节点"]
K --> L["主开关MOSFET \n (CrM/QR反激)"]
L --> M["初级地"]
N["PWM控制器"] --> O["主开关驱动器"]
O --> L
J -->|电流反馈| N
end
subgraph "二次侧输出"
P["主变压器次级"] --> Q["同步整流/整流"]
Q --> R["输出滤波"]
R --> S["系统供电总线 \n 12V/24V"]
S --> T["辅助电源模块"]
T --> U["5V/3.3V辅助电源"]
end
subgraph "保护电路"
V["RCD缓冲电路"] --> F
W["RC吸收电路"] --> L
X["过压保护"] --> S
Y["过流保护"] --> J
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style L fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
动态背光驱动拓扑详图
graph TB
subgraph "Mini-LED背光系统架构"
A["系统供电总线 \n 24V/12V"] --> B["背光驱动控制器"]
B --> C["背光栅极驱动器阵列"]
end
subgraph "独立调光分区(示例4分区)"
C --> D["分区1驱动"]
C --> E["分区2驱动"]
C --> F["分区3驱动"]
C --> G["分区4驱动"]
subgraph "分区1驱动电路"
D --> H["VBGM11203 \n 120V/120A"]
H --> I["LED灯串1 \n 多颗Mini-LED"]
I --> J["电流采样电阻"]
J --> K["地"]
L["TVS保护"] --> H
end
subgraph "分区2驱动电路"
E --> M["VBGM11203 \n 120V/120A"]
M --> N["LED灯串2 \n 多颗Mini-LED"]
N --> O["电流采样电阻"]
O --> K
P["TVS保护"] --> M
end
subgraph "分区3驱动电路"
F --> Q["VBGM11203 \n 120V/120A"]
Q --> R["LED灯串3 \n 多颗Mini-LED"]
R --> S["电流采样电阻"]
S --> K
T["TVS保护"] --> Q
end
subgraph "分区4驱动电路"
G --> U["VBGM11203 \n 120V/120A"]
U --> V["LED灯串4 \n 多颗Mini-LED"]
V --> W["电流采样电阻"]
W --> K
X["TVS保护"] --> U
end
end
subgraph "温度监控与保护"
Y["NTC温度传感器"] --> Z["温度监控IC"]
Z --> B
AA["过流保护电路"] --> B
AB["开路检测电路"] --> B
end
subgraph "亮度控制接口"
AC["主SoC/TCON"] --> AD["PWM调光信号"]
AD --> B
AE["I2C/SPI控制接口"] --> B
end
style H fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style M fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style Q fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style U fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与EMC设计拓扑详图
graph LR
subgraph "三级热管理系统"
A["一级散热:金属背板"] --> B["主电源MOSFET \n VBP165R96SFD"]
C["二级散热:铝基板"] --> D["背光驱动MOSFET \n VBGM11203"]
E["三级散热:PCB敷铜"] --> F["负载开关IC \n VBA2307B"]
G["温度传感器网络"] --> H["热管理MCU"]
H --> I["风扇PWM控制"]
H --> J["动态降载策略"]
I --> K["冷却风扇阵列"]
end
subgraph "EMC设计与信号完整性"
subgraph "传导EMI抑制"
L["共模电感"] --> M["X电容阵列"]
N["Y电容"] --> O["接地平面"]
end
subgraph "辐射EMI控制"
P["屏蔽层设计"] --> Q["关键信号包地"]
R["金属中框接地"] --> S["缝隙间距优化"]
end
subgraph "电源完整性"
T["多层PCB堆叠"] --> U["电源平面分割"]
V["去耦电容网络"] --> W["高频低ESL电容"]
X["电源域隔离"] --> Y["VBA2307B负载开关"]
end
end
subgraph "可靠性增强设计"
subgraph "电气应力保护"
Z["RCD缓冲网络"] --> AA["PFC开关管"]
AB["RC吸收电路"] --> AC["主开关管"]
AD["TVS箝位阵列"] --> AE["LED驱动输出"]
end
subgraph "故障诊断机制"
AF["电流采样"] --> AG["比较器阵列"]
AH["电压监测"] --> AI["ADC采样"]
AJ["温度监测"] --> AK["过温保护"]
AG --> AL["故障锁存器"]
AI --> AL
AK --> AL
AL --> AM["关断控制信号"]
AM --> AA
AM --> AC
end
subgraph "电源序列管理"
AN["MCU GPIO"] --> AO["电平转换"]
AO --> AP["VBA2307B使能控制"]
AP --> AQ["SoC上电序列"]
AP --> AR["DDR上电序列"]
AP --> AS["TCON上电序列"]
end
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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