graph LR
subgraph "主备电源冗余切换系统"
A["AC适配器输入 \n 12V/24V"] --> B["TVS保护 \n 自恢复保险丝"]
C["备用电池 \n 12V/24V"] --> D["电池保护电路"]
B --> E["VB4658通道1输入"]
D --> F["VB4658通道2输入"]
subgraph G ["VB4658 双P-MOSFET"]
direction LR
G1["CH1: -60V/-3A \n SOT23-3"]
G2["CH2: -60V/-3A \n SOT23-3"]
end
E --> G1
F --> G2
G1 --> H["系统电源总线"]
G2 --> H
I["MCU控制逻辑"] --> J["电平转换电路"]
J --> K["NPN驱动三极管"]
K --> L["VB4658栅极驱动"]
L --> G1
L --> G2
end
subgraph "系统电源监测"
H --> M["电压监测电路"]
H --> N["电流检测电路"]
M --> O["ADC输入"]
N --> O
O --> P["主控MCU"]
P --> I
end
style G1 fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
警号与大电流负载驱动拓扑详图
graph TB
subgraph "大电流感性负载驱动"
A["系统电源总线"] --> B["负载保护网络"]
B --> C["VBI1201K输入"]
subgraph D ["VBI1201K N-MOSFET"]
direction LR
D1["200V/2A \n SOT89封装"]
end
C --> D1
D1 --> E["负载驱动节点"]
E --> F["警号/喇叭"]
E --> G["Strobe闪光灯"]
E --> H["继电器线圈"]
I["MCU PWM输出"] --> J["推挽驱动电路"]
J --> K["栅极驱动信号"]
K --> D1
end
subgraph "保护电路设计"
F --> L["续流二极管"]
G --> M["RC吸收网络 \n 100R+100nF"]
H --> N["反向二极管"]
subgraph O ["TVS保护阵列"]
direction LR
O1["警号端口TVS"]
O2["驱动芯片TVS"]
end
E --> O1
K --> O2
end
subgraph "热管理设计"
D1 --> P["PCB敷铜散热"]
P --> Q["温度传感器"]
Q --> R["MCU温度监测"]
R --> S["智能PWM调节"]
S --> I
end
style D1 fill:#fff3e0,stroke:#ff9800,stroke-width:2px
传感器与通信接口控制拓扑详图
graph LR
subgraph "多路传感器电源管理"
A["系统电源总线"] --> B["VBI3328电源输入"]
subgraph C ["VBI3328 双N-MOSFET"]
direction TB
C1["CH1: 30V/5.2A \n Rds(on)=22mΩ"]
C2["CH2: 30V/5.2A \n Rds(on)=22mΩ"]
end
B --> C1
B --> C2
C1 --> D["传感器电源总线"]
C2 --> E["通信模块电源"]
D --> F["PIR传感器"]
D --> G["门磁传感器"]
D --> H["烟感传感器"]
E --> I["GPRS模块"]
E --> J["Wi-Fi模块"]
end
subgraph "MCU直接驱动接口"
K["MCU GPIO1"] --> L["栅极串联电阻"]
L --> M["VBI3328 CH1栅极"]
M --> C1
N["MCU GPIO2"] --> O["栅极串联电阻"]
O --> P["VBI3328 CH2栅极"]
P --> C2
Q["下拉电阻"] --> M
R["下拉电阻"] --> P
end
subgraph "ESD与保护设计"
subgraph S ["ESD保护阵列"]
direction LR
S1["栅极TVS保护"]
S2["电源线TVS"]
end
M --> S1
P --> S1
D --> S2
E --> S2
T["电源滤波电容"] --> D
U["电源滤波电容"] --> E
end
style C1 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VBI3328规格书
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