graph LR
subgraph "D类功放H桥功率级"
A["20-30V音频电源"] --> B["VBQF2305高侧开关1"]
A --> C["VBQF2305高侧开关2"]
B --> D["扬声器正端"]
C --> E["扬声器负端"]
F["VBQF2305低侧开关1"] --> D
G["VBQF2305低侧开关2"] --> E
H["栅极驱动器"] --> B
H --> C
H --> F
H --> G
I["D类功放控制器"] --> H
D --> J["LC滤波器"]
E --> J
J --> K["4-8Ω扬声器"]
L["PWM音频信号"] --> I
end
subgraph "栅极驱动保护"
M["栅极串联电阻"] --> N["VBQF2305栅极"]
O["栅极下拉电阻"] --> N
P["TVS保护"] --> N
Q["驱动环路优化"] --> H
end
subgraph "热管理与保护"
R["PCB散热焊盘"] --> B
R --> F
S["过孔阵列"] --> R
T["反电动势吸收"] --> D
T --> E
U["过流检测"] --> I
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
多路电源管理拓扑详图
graph TB
subgraph "主电源路径管理"
A["AC适配器输入"] --> B["VBKB5245(N-MOS) \n 主路径开关"]
C["锂电池组"] --> D["VBKB5245(P-MOS) \n 电池路径开关"]
B --> E["主电源总线"]
D --> E
E --> F["多路DC-DC转换器"]
G["电源管理IC"] --> B
G --> D
H["输入源检测"] --> G
end
subgraph "外围模块电源开关"
F --> I["5V外围总线"]
F --> J["3.3V外围总线"]
subgraph "VBKB5245开关阵列"
K["VBKB5245(P-MOS) \n Wi-Fi模块电源"]
L["VBKB5245(P-MOS) \n 麦克风阵列电源"]
M["VBKB5245(P-MOS) \n LED灯效电源"]
N["VBKB5245(N-MOS) \n 散热风扇控制"]
end
I --> K
J --> L
J --> M
I --> N
O["主控MCU"] --> K
O --> L
O --> M
O --> N
K --> P["Wi-Fi/BT模块"]
L --> Q["阵列麦克风"]
M --> R["LED灯效"]
N --> S["散热风扇"]
end
subgraph "保护电路"
T["输入TVS保护"] --> A
U["输出TVS阵列"] --> I
V["续流二极管"] --> S
W["电流检测"] --> O
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style K fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
低功耗待机控制拓扑详图
graph LR
subgraph "纳米级待机电源控制"
A["待机电源 \n 1.8V/3.3V"] --> B["电源管理IC"]
B --> C["VBTA1220NS \n 唤醒模块开关"]
C --> D["本地语音唤醒模块"]
D --> E["Always-on监听"]
F["主控MCU深度睡眠"] --> G["低电平GPIO \n (1.8V)"]
G --> C
H["唤醒事件检测"] --> D
H --> I["唤醒信号"]
I --> B
I --> F
end
subgraph "低功耗优化设计"
J["极低Vth(0.5V)"] --> C
K["低驱动电压(2.5V)"] --> C
L["微安级漏电流"] --> C
M["噪声滤波电容"] --> G
N["干净控制走线"] --> G
end
subgraph "系统状态管理"
O["深度睡眠模式"] --> F
P["仅PMIC活跃"] --> B
Q["唤醒模块供电"] --> D
R["主功放断电"] --> S["音频功放级"]
T["外围模块断电"] --> U["Wi-Fi/LED等"]
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style B fill:#fce4ec,stroke:#e91e63,stroke-width:2px
点击下载：VBKB5245规格书
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