graph LR
subgraph "车辆电源输入保护"
A["车辆OBD接口 \n Pin16 (+12V/24V)"] --> B["输入滤波 \n LC网络"]
B --> C["TVS阵列 \n 防负载突降"]
C --> D["防反接电路"]
D --> E["VB2101K输入 \n 高侧开关"]
E --> F["VB2101K \n P-MOSFET"]
F --> G["保护后电源总线"]
subgraph "控制与监控"
H["MCU GPIO"] --> I["控制逻辑"]
I --> J["栅极驱动"]
J --> F
K["电流检测放大器"] --> L["ADC输入"]
L --> H
M["电压分压监测"] --> N["比较器"]
N --> O["故障指示"]
O --> H
end
G --> K
G --> M
end
subgraph "保护元件参数"
TVS_SPEC["TVS: 36V钳位 \n 600W瞬态功率"]
FUSE_SPEC["保险丝: 2A慢断"]
CAP_SPEC["滤波电容: 100uF+0.1uF"]
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
核心DC-DC同步整流拓扑详图
graph TB
subgraph "同步Buck转换器"
A["输入: 12V/24V"] --> B["输入电容"]
B --> C["Buck控制器"]
C --> D["栅极驱动器"]
subgraph "功率开关对"
E["上管Q1 \n N-MOSFET"]
F["下管Q2 \n VBQF1306"]
end
D --> E
D --> F
E --> G["开关节点SW"]
G --> F
G --> H["功率电感"]
H --> I["输出电容"]
I --> J["输出: 5V/3.3V"]
subgraph "反馈与控制"
K["电压反馈"] --> C
L["电流检测"] --> C
M["温度监测"] --> C
N["软启动控制"] --> C
end
J --> K
F --> L
end
subgraph "PCB热设计"
O["DFN8(3x3)焊盘"] --> P["热过孔阵列"]
P --> Q["内层接地层"]
Q --> R["散热铜箔区域"]
S["热敏电阻"] --> T["温度监控"]
end
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
智能接口电源管理拓扑详图
graph LR
subgraph "双通道智能负载开关"
A["12V/24V输入"] --> B["VBC6P3033"]
subgraph "集成双P-MOS结构"
direction TB
CH1_GATE["通道1栅极"]
CH2_GATE["通道2栅极"]
CH1_SOURCE["通道1源极"]
CH2_SOURCE["通道2源极"]
COMMON_DRAIN["公共漏极"]
end
B --> CH1_GATE
B --> CH2_GATE
A --> COMMON_DRAIN
subgraph "控制逻辑与保护"
C["MCU GPIO1"] --> D["电平转换"]
E["MCU GPIO2"] --> F["电平转换"]
D --> CH1_GATE
F --> CH2_GATE
G["过流检测"] --> H["比较器"]
H --> I["故障标志"]
I --> C
I --> E
end
CH1_SOURCE --> J["通道1输出"]
CH2_SOURCE --> K["通道2输出"]
J --> L["负载1: CAN收发器"]
J --> M["负载2: WiFi模块"]
K --> N["负载3: 传感器"]
K --> O["负载4: LED"]
L --> P["车辆CAN总线"]
M --> Q["无线网络"]
N --> R["传感器数据"]
O --> S["状态指示"]
end
subgraph "时序控制策略"
T["上电序列"] --> U["1. 核心电源稳定"]
U --> V["2. 通信接口上电"]
V --> W["3. 外设电源使能"]
X["下电序列"] --> Y["1. 外设电源关闭"]
Y --> Z["2. 通信接口下电"]
Z --> AA["3. 进入低功耗模式"]
end
style B fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBQF1306规格书
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