graph LR
subgraph "同步降压转换器"
A["PoE/适配器输入 \n 12-48VDC"] --> B["输入电容 \n 低ESR"]
B --> C["VBQG1620 \n 上管"]
C --> D["功率电感 \n 高频铁硅铝"]
D --> E["输出电容组 \n MLCC+聚合物"]
E --> F["系统电源轨 \n 3.3V/5V/12V"]
G["VBQG1620 \n 下管"] --> H["功率地"]
I["同步降压控制器"] --> J["栅极驱动器"]
J --> C
J --> G
subgraph "反馈与补偿"
K["输出电压采样"] --> L["误差放大器"]
L --> M["补偿网络"]
M --> I
end
subgraph "保护电路"
N["输入过压保护"] --> O["关断逻辑"]
P["输出过流保护"] --> O
Q["热关断"] --> O
O --> I
end
D --> K
C -->|开关节点| D
G -->|开关节点| D
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
红外LED恒流驱动拓扑详图
graph TB
subgraph "大电流LED恒流驱动"
A["系统电源轨 \n 12V"] --> B["LED驱动IC \n 恒流控制"]
B --> C["大电流栅极驱动器"]
C --> D["VBGQF1402 \n 驱动MOSFET"]
D --> E["电流采样电阻 \n 高精度"]
E --> F["红外LED串 \n 850/940nm"]
F --> G["LED回路地"]
H["PWM调光信号"] --> B
I["光敏传感器"] --> B
subgraph "并联扩展"
J["VBGQF1402 \n 并联MOSFET"]
K["VBGQF1402 \n 并联MOSFET"]
end
C --> J
C --> K
J --> E
K --> E
subgraph "热管理"
L["MOSFET散热焊盘"] --> M["PCB热通孔"]
M --> N["背面铜层散热"]
O["温度传感器"] --> P["热保护电路"]
P --> B
end
subgraph "保护电路"
Q["TVS浪涌保护"] --> R["LED正极"]
S["过压保护"] --> T["关断控制"]
U["过流保护"] --> T
T --> B
end
style D fill:#ffebee,stroke:#f44336,stroke-width:2px
style J fill:#ffebee,stroke:#f44336,stroke-width:2px
style K fill:#ffebee,stroke:#f44336,stroke-width:2px
end
多路负载智能管理拓扑详图
graph LR
subgraph "四路负载智能开关"
A["主控MCU GPIO"] --> B["电平转换/缓冲"]
subgraph "通道1:云台水平电机"
C1["VBC6N2014 CH1"] --> D1["H桥驱动电路"]
D1 --> E1["水平步进电机"]
F1["电流检测"] --> G1["堵转保护"]
G1 --> H1["故障反馈"]
end
subgraph "通道2:云台垂直电机"
C2["VBC6N2014 CH2"] --> D2["H桥驱动电路"]
D2 --> E2["垂直步进电机"]
F2["电流检测"] --> G2["堵转保护"]
G2 --> H2["故障反馈"]
end
subgraph "通道3:加热模块"
C3["VBC6N2014 CH3"] --> I3["加热片/PTC"]
J3["温度传感器"] --> K3["PID温控"]
K3 --> L3["PWM控制"]
end
subgraph "通道4:散热风扇"
C4["VBC6N2014 CH4"] --> M4["直流风扇"]
N4["转速检测"] --> O4["风速控制"]
O4 --> P4["PWM调频"]
end
B --> C1
B --> C2
B --> C3
B --> C4
Q["12V负载电源"] --> C1
Q --> C2
Q --> C3
Q --> C4
H1 --> A
H2 --> A
L3 --> A
P4 --> A
subgraph "保护网络"
R["续流二极管"] --> S["电机绕组"]
T["RC吸收电路"] --> U["开关节点"]
V["ESD保护"] --> W["栅极引脚"]
end
style C1 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style C2 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style C3 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style C4 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
end
热管理与系统保护拓扑详图
graph TB
subgraph "三级热管理系统"
A["一级:PCB敷铜散热"] --> B["VBQG1620 \n DC-DC MOSFET"]
C["二级:散热焊盘+热通孔"] --> D["VBGQF1402 \n LED驱动MOSFET"]
E["三级:金属外壳导热"] --> F["VBC6N2014 \n 负载开关"]
subgraph "温度监控网络"
G["NTC温度传感器1"] --> H["MOSFET结温监测"]
I["NTC温度传感器2"] --> J["环境温度监测"]
K["数字温度传感器"] --> L["关键IC温度"]
end
subgraph "主动散热控制"
M["温度数据"] --> N["MCU热管理算法"]
N --> O["风扇PWM控制"]
N --> P["LED功率降额"]
N --> Q["负载功率限制"]
O --> R["散热风扇"]
end
H --> M
J --> M
L --> M
end
subgraph "全系统保护网络"
S["输入侧保护"] --> T["TVS阵列 \n 过压保护"]
U["电源路径保护"] --> V["保险丝/熔断器 \n 过流保护"]
W["负载侧保护"] --> X["电流检测+比较器 \n 短路保护"]
Y["信号线保护"] --> Z["ESD二极管 \n 静电保护"]
AA["通信接口保护"] --> BB["共模扼流圈 \n 浪涌保护"]
CC["故障收集逻辑"] --> DD["MCU故障处理"]
DD --> EE["分级关断策略"]
EE --> FF["安全状态恢复"]
T --> CC
V --> CC
X --> CC
Z --> CC
BB --> CC
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#ffebee,stroke:#f44336,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VBC6N2014规格书
中文
English
