graph LR
subgraph "同步降压转换器"
A["12V/24V输入"] --> B["输入电容"]
B --> C["VBGQF1302高侧开关"]
C --> D["开关节点"]
D --> E["功率电感"]
E --> F["输出电容"]
F --> G["核心供电输出 \n 3.3V/5V"]
D --> H["VBGQF1302低侧开关"]
H --> I["功率地"]
J["同步降压控制器"] --> K["栅极驱动器"]
K --> C
K --> H
L["电压反馈"] --> J
M["电流检测"] --> J
N["PWM信号"] --> J
end
subgraph "负载分配"
G --> O["主控MCU"]
G --> P["射频前端"]
G --> Q["AI加速器"]
G --> R["通信接口"]
end
subgraph "热管理"
S["温度传感器"] --> T["MCU监控"]
T --> U["风扇控制"]
U --> V["散热风扇"]
W["PCB敷铜散热"] --> C
W --> H
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
电源路径管理与负载开关拓扑详图
graph LR
subgraph "主备电源切换电路"
A["主电源输入"] --> B["VBQF2625 \n 主电源开关"]
C["备用电池"] --> D["VBQF2625 \n 备用电源开关"]
B --> E["主电源总线"]
D --> E
F["电源管理IC"] --> G["控制逻辑"]
G --> B
G --> D
H["电压检测"] --> F
end
subgraph "OR-ing理想二极管电路"
E --> I["VBQF2625 A"]
E --> J["VBQF2625 B"]
K["负载侧"] --> I
K --> J
L["体二极管"] --> I
M["体二极管"] --> J
end
subgraph "模块供电控制"
N["主电源总线"] --> O["VBQF2625 通道1"]
N --> P["VBQF2625 通道2"]
N --> Q["VBQF2625 通道3"]
O --> R["4G/5G通信模块"]
P --> S["高清摄像头"]
Q --> T["外部扩展接口"]
U["MCU GPIO"] --> V["电平转换"]
V --> O
V --> P
V --> Q
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style O fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
外围接口精细控制拓扑详图
graph LR
subgraph "双路P-MOS负载开关"
A["MCU GPIO"] --> B["栅极串联电阻"]
B --> C["VBK4223N通道1栅极"]
B --> D["VBK4223N通道2栅极"]
subgraph C ["VBK4223N芯片内部"]
direction LR
GATE1[栅极1]
GATE2[栅极2]
SOURCE1[源极1]
SOURCE2[源极2]
DRAIN1[漏极1]
DRAIN2[漏极2]
end
E["3.3V电源"] --> SOURCE1
E --> SOURCE2
DRAIN1 --> F["传感器阵列供电"]
DRAIN2 --> G["指示灯/蜂鸣器供电"]
F --> H["温度传感器"]
F --> I["湿度传感器"]
F --> J["光照传感器"]
G --> K["状态LED"]
G --> L["蜂鸣器"]
H --> M[地]
I --> M
J --> M
K --> M
L --> M
end
subgraph "保护与滤波"
N["ESD保护二极管"] --> C
N --> D
O["TVS管阵列"] --> F
O --> G
P["滤波电容"] --> F
P --> G
Q["自恢复保险丝"] --> F
end
subgraph "I2C传感器阵列"
R["I2C总线"] --> H
R --> I
R --> J
S["上拉电阻"] --> R
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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