graph TB
subgraph "非隔离DC-DC降压转换器"
A["24V DC输入"] --> B["输入电容"]
B --> C["VBQF1306 High-side"]
C --> D["功率电感"]
D --> E["输出电容"]
E --> F["5V/3.3V输出"]
G["VBQF1306 Low-side"] --> H["功率地"]
C --> I["同步整流控制器"]
G --> I
I --> J["死区时间控制"]
J --> C
J --> G
end
subgraph "驱动与保护电路"
K["驱动IC"] --> C
K --> G
L["电流检测电阻"] --> M["比较器"]
M --> N["过流保护"]
O["温度传感器"] --> P["热关断"]
Q["TVS保护"] --> C
Q --> G
end
subgraph "滤波与EMI抑制"
R["高频MLCC"] --> C
R --> G
S["RC吸收网络"] --> D
T["共模电感"] --> A
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
多路数字输出驱动拓扑详图
graph LR
subgraph "双路N-MOSFET驱动通道"
A["MCU GPIO"] --> B["10Ω栅极电阻"]
B --> C["VBI3328 Ch1栅极"]
C --> D["VBI3328 Ch1漏极"]
D --> E["负载(继电器/电磁阀)"]
E --> F["负载地"]
G["下拉电阻"] --> C
H["24V电源"] --> D
I["续流二极管"] --> D
I --> F
end
subgraph "四通道阵列布局"
subgraph "Channel 1-2"
J["VBI3328-1 Ch1"]
K["VBI3328-1 Ch2"]
end
subgraph "Channel 3-4"
L["VBI3328-2 Ch1"]
M["VBI3328-2 Ch2"]
end
N["MCU GPIO1"] --> J
O["MCU GPIO2"] --> K
P["MCU GPIO3"] --> L
Q["MCU GPIO4"] --> M
end
subgraph "保护电路"
R["TVS栅极保护"] --> C
S["RC吸收网络"] --> D
T["过流检测"] --> E
U["通道状态反馈"] --> A
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style J fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
接口保护与智能开关拓扑详图
graph TB
subgraph "互补MOSFET对管配置"
A["逻辑控制信号"] --> B["电平转换器"]
B --> C["VBQG5222 N-MOS栅极"]
B --> D["VBQG5222 P-MOS栅极"]
E["24V电源"] --> F["VBQG5222 N-MOS漏极"]
G["VBQG5222 P-MOS源极"] --> H["负载端"]
F --> I["连接点"]
I --> G
subgraph "保护功能"
J["理想二极管模式"] --> I
K["防反接功能"] --> F
L["热插拔保护"] --> G
end
end
subgraph "OR-ing电源选择电路"
M["主电源24V"] --> N["VBQG5222 N-MOS"]
O["备用电源24V"] --> P["VBQG5222 P-MOS"]
N --> Q["公共输出端"]
P --> Q
R["电源优先级控制"] --> N
R --> P
end
subgraph "接口保护网络"
S["I/O端口"] --> T["TVS阵列"]
U["通信接口"] --> V["ESD保护"]
W["传感器端口"] --> X["过压钳位"]
Y["电流限制"] --> S
Y --> U
Y --> W
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBI3328规格书
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