graph LR
subgraph "同步降压功率级"
A["输入12V/19V"] --> B["输入电容"]
B --> C["上桥MOSFET"]
C --> D["开关节点"]
D --> E["VBQF1402 \n 下桥同步整流 \n 40V/60A/2mΩ"]
E --> F["功率地"]
D --> G["输出电感"]
G --> H["输出电容"]
H --> I["核心供电输出 \n 1.0V/1.8V/3.3V"]
end
subgraph "控制与驱动"
J["PWM控制器"] --> K["栅极驱动器"]
K --> C
K --> E
I -->|电压反馈| J
L["电流检测"] -->|电流反馈| J
end
subgraph "散热设计"
M["PCB顶层敷铜"] --> N["过孔阵列"]
N --> O["内层地平面"]
O --> P["背面铜层"]
P --> Q["散热焊盘"]
end
M --> E
style E fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
射频信号路径切换拓扑详图
graph LR
subgraph "MIMO天线切换矩阵"
A["天线端口1 \n 2.4/5/6GHz"] --> B["VBBD3222 \n 双N沟道 \n 通道A"]
C["天线端口2 \n 2.4/5/6GHz"] --> D["VBBD3222 \n 双N沟道 \n 通道B"]
E["天线端口3 \n 2.4/5/6GHz"] --> F["VBBD3222 \n 双N沟道 \n 通道C"]
G["天线端口4 \n 2.4/5/6GHz"] --> H["VBBD3222 \n 双N沟道 \n 通道D"]
B --> I["射频合路器"]
D --> I
F --> I
H --> I
end
subgraph "频段选择开关网络"
I --> J["VBBD3222 \n 2.4GHz路径"]
I --> K["VBBD3222 \n 5GHz路径"]
I --> L["VBBD3222 \n 6GHz路径"]
J --> M["2.4GHz带通滤波器"]
K --> N["5GHz带通滤波器"]
L --> O["6GHz带通滤波器"]
M --> P["射频开关矩阵"]
N --> P
O --> P
end
subgraph "控制与匹配"
Q["Wi-Fi SOC \n 射频控制"] --> R["GPIO控制信号"]
R --> S["驱动缓冲器"]
S --> B
S --> D
S --> F
S --> H
S --> J
S --> K
S --> L
T["50Ω匹配网络"] --> B
T --> D
T --> F
T --> H
U["ESD保护"] --> A
U --> C
U --> E
U --> G
end
P --> V["SOC射频输入端口"]
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style J fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
USB接口电源管理拓扑详图
graph LR
subgraph "USB VBUS智能分配"
A["USB端口 \n VBUS 5V"] --> B["TVS浪涌保护"]
B --> C["输入滤波电容"]
C --> D["VBKB4265 \n 通道1 \n P-MOSFET"]
C --> E["VBKB4265 \n 通道2 \n P-MOSFET"]
subgraph "负载通道管理"
D --> F["射频功放模块 \n +5V/1.5A"]
E --> G["传感器与LED \n +5V/0.5A"]
end
F --> H["功率地"]
G --> H
end
subgraph "控制与保护电路"
I["Wi-Fi SOC"] --> J["电源管理固件"]
J --> K["GPIO控制端口"]
K --> L["电平转换器 \n 3.3V to 5V"]
L --> M["驱动电路"]
M --> D
M --> E
subgraph "监测与保护"
N["电流检测电阻"] --> O["比较器"]
P["温度传感器"] --> Q["ADC输入"]
R["过压保护"] --> S["故障锁存"]
end
N --> F
P --> H
R --> C
O --> I
Q --> I
S --> M
end
subgraph "热插拔与软启动"
T["插入检测电路"] --> U["软启动控制"]
U --> V["缓启动电容"]
V --> M
end
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style E fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBBD3222规格书
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