graph LR
subgraph "VBQF1202音频电源管理"
A["电池输入 \n 3.0-4.2V"] --> B["输入滤波 \n π型滤波器"]
B --> C["VBQF1202 \n 20V/100A/DFN8"]
C --> D["升压转换器 \n 至5V/12V"]
D --> E["Class-D功放 \n 电源输入"]
E --> F["H桥输出"]
F --> G["扬声器负载"]
H["MCU控制"] --> I["PWM信号"]
I --> E
subgraph "保护电路"
J["RC缓冲网络"]
K["肖特基二极管"]
L["过流检测"]
end
F --> J
F --> K
C --> L
L --> H
end
subgraph "EMC设计"
M["磁珠滤波"] --> N["MLCC阵列"]
O["屏蔽罩隔离"] --> P["分区布局"]
B --> M
E --> N
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
充电与负载管理详图
graph LR
subgraph "VB5460双路智能开关"
A["USB-C输入"] --> B["VB5460 P-MOS \n 充电通路控制"]
B --> C["电池充电管理"]
D["主电源VCC"] --> E["VB5460 N-MOS \n 翻译核心开关"]
D --> F["VB5460 N-MOS \n 蓝牙模块开关"]
E --> G["AI翻译核心 \n 供电"]
F --> H["蓝牙模块 \n 供电"]
I["MCU GPIO"] --> J["电平转换电路"]
J --> B
J --> E
J --> F
end
subgraph "智能功耗管理"
K["工作状态监测"] --> L["动态供电策略"]
L --> M["场景1: 充电模式"]
L --> N["场景2: 翻译模式"]
L --> O["场景3: 待机模式"]
M -->|"关闭非核心负载"| E
M -->|"关闭非核心负载"| F
N -->|"全功率开启"| E
N -->|"保持连接"| F
O -->|"关闭所有负载"| E
O -->|"保持待机"| F
end
subgraph "保护功能"
P["过流保护"] --> Q["故障锁存"]
R["电压监测"] --> S["异常检测"]
B --> P
E --> R
F --> R
Q --> T["关断信号"]
T --> B
T --> E
T --> F
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style F fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
麦克风阵列电源管理详图
graph LR
subgraph "VBI1322麦克风电源开关"
A["主电源VCC"] --> B["VBI1322 \n 30V/6.8A/SOT89"]
B --> C["纯净麦克风偏置"]
C --> D["麦克风阵列1"]
C --> E["麦克风阵列2"]
C --> F["麦克风阵列3"]
subgraph "低噪声设计"
G["LC滤波网络"]
H["屏蔽走线"]
I["星型接地"]
end
B --> G
G --> D
G --> E
G --> F
D --> H
E --> H
F --> H
end
subgraph "快速唤醒机制"
J["MCU唤醒信号"] --> K["VBI1322使能"]
K --> L["20ms快速上电"]
L --> M["麦克风偏置就绪"]
M --> N["前置放大器启动"]
N --> O["ADC采样开始"]
P["语音检测电路"] --> Q["中断信号"]
Q --> J
end
subgraph "功耗优化"
R["休眠模式"] --> S["关断漏电流<1μA"]
T["工作模式"] --> U["动态偏置调整"]
V["环境噪声监测"] --> W["智能增益控制"]
S --> B
U --> B
W --> C
end
style B fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与可靠性详图
graph LR
subgraph "三级热管理系统"
subgraph "一级散热: PCB敷铜"
A["2oz铜厚底层"] --> B["大面积敷铜区域"]
B --> C["VBQF1202热焊盘"]
C --> D["热通孔阵列"]
end
subgraph "二级散热: 壳体导热"
E["金属耳机壳体"] --> F["导热垫片"]
F --> G["关键热点接触"]
G --> C
end
subgraph "三级散热: 自然对流"
H["环境空气"] --> I["表面散热"]
I --> J["VBI1322 SOT89"]
I --> K["VB5460 SOT23-6"]
end
end
subgraph "温度监测网络"
L["NTC传感器1 \n 腔体温"] --> M["ADC通道1"]
N["NTC传感器2 \n PCB热点"] --> O["ADC通道2"]
P["NTC传感器3 \n 电池旁"] --> Q["ADC通道3"]
M --> R["MCU温度监测"]
O --> R
Q --> R
end
subgraph "可靠性增强设计"
S["TVS阵列保护"] --> T["USB/电池端口"]
U["RC缓冲电路"] --> V["感性负载端"]
W["肖特基二极管"] --> X["反向电压保护"]
Y["电压监控"] --> Z["过压/欠压锁定"]
R --> AA["温控策略"]
AA -->|"温度>45°C"| AB["降频处理"]
AA -->|"温度>50°C"| AC["关断非核心"]
end
subgraph "故障诊断机制"
AD["电流检测"] --> AE["过载保护"]
AF["电压检测"] --> AG["短路识别"]
AH["通信监测"] --> AI["看门狗复位"]
AE --> AJ["故障标志位"]
AG --> AJ
AI --> AJ
AJ --> AK["系统日志"]
AK --> AL["OTA上报"]
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style J fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style K fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VB2355规格书
中文
English
