graph LR
subgraph "VBQG3322 主电源路径管理"
A["PCIe/USB接口 \n 5V/12V输入"] --> B["输入滤波 \n 10μF+0.1μF MLCC"]
B --> C["VBQG3322 CH1 \n 主芯片供电"]
B --> D["VBQG3322 CH2 \n I/O供电"]
subgraph C ["VBQG3322通道1"]
direction LR
IN1[输入]
GATE1[栅极]
OUT1[输出]
end
subgraph D ["VBQG3322通道2"]
direction LR
IN2[输入]
GATE2[栅极]
OUT2[输出]
end
C --> E["3.3V/5V LDO \n 或Buck转换器"]
D --> F["1.8V/3.3V LDO"]
E --> G["Wi-Fi/蓝牙 \n 主芯片"]
F --> H["GPIO/I2C/UART \n 接口"]
I["MCU GPIO"] --> J["4.5V-10V驱动"]
J --> GATE1
J --> GATE2
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
射频/基带辅助供电拓扑详图
graph LR
subgraph "VB3222 辅助电源管理"
A["主电源轨 \n 3.3V/5V"] --> B["VB3222 CH1 \n 射频前端供电"]
A --> C["VB3222 CH2 \n 时钟电路供电"]
subgraph B ["VB3222通道1配置"]
direction LR
IN1[3.3V输入]
GATE1[栅极驱动]
OUT1[射频供电]
end
subgraph C ["VB3222通道2配置"]
direction LR
IN2[3.3V输入]
GATE2[栅极驱动]
OUT2[时钟供电]
end
B --> D["射频前端模块 \n PA/LNA/开关"]
C --> E["晶体振荡器 \n 26MHz时钟"]
D --> F["天线端口"]
E --> G["基带芯片 \n 时钟输入"]
H["MCU GPIO \n 1.8V/3.3V"] --> I["直接驱动 \n 无需电平转换"]
I --> GATE1
I --> GATE2
end
subgraph "热设计与布局"
J["PCB大面积敷铜"] --> B
J --> C
K["SOT23-6封装"] --> B
K --> C
L["10-100Ω栅极电阻"] --> GATE1
L --> GATE2
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
高速信号路径切换拓扑详图
graph LR
subgraph "VB5222 信号路径切换"
A["射频收发器 \n 输出"] --> B["天线切换节点"]
B --> C["VB5222 N-MOSFET \n 主天线路径"]
B --> D["VB5222 P-MOSFET \n 分集天线路径"]
subgraph C ["N沟道信号路径"]
direction LR
RF_IN[射频输入]
GATE_N[N栅极]
RF_OUT_N[主天线输出]
end
subgraph D ["P沟道信号路径"]
direction LR
RF_IN2[射频输入]
GATE_P[P栅极]
RF_OUT_P[分集天线输出]
end
C --> E["主天线 \n 2.4GHz/5GHz"]
D --> F["分集天线 \n MIMO接收"]
G["MCU控制逻辑"] --> H["专用驱动电路"]
H --> GATE_N
H --> GATE_P
end
subgraph "信号完整性设计"
I["50Ω阻抗匹配"] --> RF_IN
I --> RF_OUT_N
J["低寄生电容设计"] --> C
J --> D
K["控制线隔离"] --> G
L["TVS保护"] --> RF_OUT_N
L --> RF_OUT_P
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VB3222规格书
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