graph LR
subgraph "隔离反激/正激转换器"
A["医疗输入36-72VDC"] --> B["输入滤波电容"]
B --> C["VBGQF1102N \n 主开关管"]
C --> D["隔离变压器初级"]
D --> E["RCD缓冲网络"]
E --> F["初级地"]
G["PWM控制器"] --> H["隔离驱动"]
H --> C
subgraph "次级侧"
D --> I["变压器次级"]
I --> J["同步整流MOSFET"]
J --> K["多级LC滤波"]
K --> L["超低噪声LDO"]
L --> M["±5V/±3.3V输出"]
end
N["反馈隔离光耦"] --> G
M -->|电压反馈| N
end
subgraph "噪声抑制措施"
O["展频技术"] --> G
P["屏蔽变压器"] --> D
Q["共模扼流圈"] --> M
R["π型滤波器"] --> K
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
热敏打印电机驱动拓扑详图
graph TB
subgraph "步进电机H桥驱动"
A["MCU PWM信号"] --> B["电机控制器"]
B --> C["预驱动器"]
subgraph "H桥功率级"
C --> D["VBQF3211 \n 高侧A"]
C --> E["VBQF3211 \n 低侧A"]
C --> F["VBQF3211 \n 高侧B"]
C --> G["VBQF3211 \n 低侧B"]
end
D --> H["电机绕组A"]
E --> H
F --> I["电机绕组B"]
G --> I
H --> J["步进电机"]
I --> J
end
subgraph "电流检测与保护"
K["高侧电流检测"] --> L["电流采样"]
L --> M["比较器"]
M --> N["过流保护"]
N --> O["关断信号"]
O --> C
P["续流二极管"] --> D
P --> E
P --> F
P --> G
end
subgraph "打印头加热控制"
Q["加热控制PWM"] --> R["驱动电路"]
R --> S["加热MOSFET"]
S --> T["热敏打印头"]
U["温度传感器"] --> V["PID控制器"]
V --> Q
end
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
智能隔离开关拓扑详图
graph LR
subgraph "N+P互补开关通道"
A["MCU GPIO"] --> B["数字隔离器"]
B --> C["电平转换"]
subgraph "VBQD5222U互补对"
C --> D["N-MOS栅极"]
C --> E["P-MOS栅极"]
F["N-MOS源极"] --> G[负载]
H["P-MOS源极"] --> I[VCC_5V]
J["N-MOS漏极"] --> K[开关输出]
L["P-MOS漏极"] --> K
end
K --> M["被控负载"]
end
subgraph "导联脱落检测应用"
N["电极信号"] --> O["VBQD5222U开关"]
O --> P["检测电路"]
P --> Q["比较器"]
Q --> R["MCU ADC"]
S["偏置电路"] --> O
end
subgraph "背光/风扇控制"
T["PWM调光信号"] --> U["VBQD5222U"]
U --> V["LED背光阵列"]
W["风扇控制"] --> X["VBQD5222U"]
X --> Y["冷却风扇"]
end
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style E fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与噪声隔离拓扑详图
graph TB
subgraph "三级热管理分区"
A["一级热区 \n (远离AFE)"] --> B["隔离电源模块"]
B --> C["VBGQF1102N"]
D["二级热区 \n (局部控制)"] --> E["电机驱动模块"]
E --> F["VBQF3211"]
G["三级热区 \n (自然冷却)"] --> H["开关与逻辑"]
H --> I["VBQD5222U"]
end
subgraph "PCB布局隔离"
J["模拟区域"] --> K["AFE与滤波器"]
L["数字区域"] --> M["MCU与逻辑"]
N["功率区域"] --> O["MOSFET与驱动器"]
J -- "≥10mm间距" --> L
L -- "≥5mm间距" --> N
P["分割地平面"] --> Q["模拟地"]
P --> R["数字地"]
P --> S["功率地"]
Q -- "单点连接" --> R
R -- "磁珠隔离" --> S
end
subgraph "噪声抑制网络"
T["电源去耦"] --> U["每芯片0.1μF+10μF"]
V["屏蔽层"] --> W["变压器屏蔽"]
X["滤波网络"] --> Y["π型/LC滤波器"]
Z["接地技术"] --> AA["星型接地"]
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style I fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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