graph LR
subgraph "宽电压输入PFC电路"
A["85-265VAC输入"] --> B["EMI滤波器与MOV"]
B --> C["桥式整流器"]
C --> D["PFC升压电感"]
D --> E["PFC开关节点"]
E --> F["VBM18R07S \n 800V/7A"]
F --> G["高压直流母线 \n ~400VDC"]
H["PFC控制器"] --> I["图腾柱驱动器"]
I --> F
G -->|电压反馈| H
end
subgraph "高压DC-DC隔离转换"
G --> J["LLC谐振变换器"]
J --> K["高频变压器"]
K --> L["同步整流级"]
L --> M["48V直流输出"]
N["LLC控制器"] --> O["隔离驱动器"]
O --> P["VBM18R07S"]
P --> Q["初级地"]
end
subgraph "驱动与保护"
R["驱动电路"] --> F
R --> P
S["RC缓冲电路"] --> F
S --> P
T["电流检测"] --> H
T --> N
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style P fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
低压大电流DC-DC与风扇墙驱动拓扑详图
graph TB
subgraph "48V转12V同步Buck转换器"
A["48V输入"] --> B["输入滤波电容"]
B --> C["上管驱动节点"]
C --> D["VBGP1602 \n 60V/210A"]
D --> E["同步节点"]
E --> F["VBGP1602 \n 60V/210A"]
F --> G["输出滤波电感"]
G --> H["12V输出 \n 最大100A"]
I["Buck控制器"] --> J["大电流驱动器"]
J --> D
J --> F
end
subgraph "风扇墙H桥驱动"
K["12V输入"] --> L["H桥控制逻辑"]
L --> M["左上管 \n VBGP1602"]
L --> N["右上管 \n VBGP1602"]
L --> O["左下管 \n VBGP1602"]
L --> P["右下管 \n VBGP1602"]
M --> Q["风扇正极"]
O --> R["风扇负极"]
N --> S["风扇正极"]
P --> T["风扇负极"]
U["PWM控制信号"] --> V["H桥驱动器"]
V --> M
V --> N
V --> O
V --> P
end
subgraph "散热与布局"
W["2oz厚铜PCB"] --> X["散热过孔阵列"]
X --> Y["接地层/散热层"]
Z["独立散热器"] --> D
Z --> F
end
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style M fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
板载电源管理与热监控拓扑详图
graph LR
subgraph "多路电源轨智能开关"
A["3.3V MCU GPIO"] --> B["电平转换电路"]
B --> C["VBK3215N \n 通道1"]
B --> D["VBK3215N \n 通道2"]
C --> E["1.8V电源轨"]
D --> F["1.0V电源轨"]
G["12V辅助电源"] --> H["VBK3215N输入"]
I["使能控制逻辑"] --> C
I --> D
end
subgraph "通信接口保护"
J["I2C/PMBus接口"] --> K["TVS保护阵列"]
K --> L["VBK3215N隔离开关"]
L --> M["管理总线"]
N["热插拔检测"] --> O["ESD保护"]
O --> L
end
subgraph "三级热监控系统"
P["NTC传感器1 \n MOSFET结温"] --> Q["ADC采集"]
R["NTC传感器2 \n 散热器温度"] --> Q
S["NTC传感器3 \n 环境温度"] --> Q
Q --> T["MCU温度管理"]
T --> U["风扇PWM控制"]
T --> V["泵速控制"]
T --> W["降频/关断保护"]
end
subgraph "故障保护网络"
X["过流检测"] --> Y["比较器"]
Z["过压检测"] --> Y
AA["过温检测"] --> Y
Y --> BB["故障锁存器"]
BB --> CC["全局关断信号"]
CC --> C
CC --> D
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style L fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBM18R07S规格书
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