graph LR
subgraph "无线能量接收端"
A["接收线圈 \n Lr"] --> B["串联谐振电容 \n Cr"]
B --> C["交流电压 \n V_AC"]
end
subgraph "VBI5325同步整流桥"
C --> D["VBI5325 N-MOS \n 栅极驱动"]
C --> E["VBI5325 P-MOS \n 栅极驱动"]
D --> F["同步整流控制器"]
E --> F
subgraph "整流工作路径"
G["AC+"] --> H["VBI5325 N-MOS \n 漏极"]
H --> I["VBI5325 N-MOS \n 源极"]
I --> J["整流输出+"]
G --> K["VBI5325 P-MOS \n 源极"]
K --> L["VBI5325 P-MOS \n 漏极"]
L --> M["整流输出-"]
end
end
subgraph "驱动与保护"
N["MCU PWM"] --> O["死区时间控制"]
O --> P["栅极驱动器"]
P --> D
P --> E
Q["电压检测"] --> R["过零检测电路"]
R --> F
S["TVS阵列"] --> G
T["RC缓冲"] --> H
T --> K
end
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style K fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
高效稳压与负载管理拓扑详图
graph TB
subgraph "VBGQF1101N高效稳压路径"
A["整流后直流输入 \n 5-20V"] --> B["输入电容阵"]
B --> C["VBGQF1101N \n 漏极"]
subgraph "控制环路"
D["误差放大器"] --> E["PWM控制器"]
E --> F["栅极驱动器"]
F --> G["VBGQF1101N栅极"]
end
C --> H["VBGQF1101N源极"]
H --> I["输出滤波电感"]
I --> J["输出电容阵"]
J --> K["稳压输出 \n 3.3-5V/2A"]
K --> L["电压反馈"]
L --> D
end
subgraph "VBKB2220智能负载管理"
M["MCU GPIO"] --> N["电平转换"]
N --> O["VBKB2220栅极"]
subgraph "负载开关阵列"
P["VBKB2220_CHG \n 源极"] --> Q["VBKB2220_CHG \n 漏极"]
R["VBKB2220_SENSOR \n 源极"] --> S["VBKB2220_SENSOR \n 漏极"]
T["VBKB2220_LED \n 源极"] --> U["VBKB2220_LED \n 漏极"]
end
K --> P
K --> R
K --> T
Q --> V["电池充电IC"]
S --> W["传感器阵列"]
U --> X["LED指示灯"]
V --> Y["锂电池 \n 3.7V"]
end
subgraph "保护与监控"
Z1["过流检测"] --> AA["比较器"]
AA --> AB["故障锁存"]
AB --> AC["关断信号"]
AC --> G
AC --> O
AD["温度传感器"] --> AE["ADC"]
AE --> MCU["管理MCU"]
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style P fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style R fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style T fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与PCB布局拓扑详图
graph LR
subgraph "三层热管理架构"
A["一级热管理 \n 重点散热"] --> B["VBGQF1101N \n DFN8(3x3)"]
subgraph "PCB散热设计"
C["大面积散热焊盘"] --> B
D["多排过孔阵列"] --> E["内部地平面"]
E --> F["系统外壳"]
end
G["二级热管理 \n 优化散热"] --> H["VBI5325 \n SOT89-6"]
subgraph "焊盘优化"
I["扩展铜箔"] --> H
J["热通孔"] --> K["中间层"]
end
L["三级热管理 \n 自然散热"] --> M["VBKB2220 \n SC70-8"]
N["敷铜散热"] --> M
end
subgraph "电气保护网络"
O["TVS阵列 \n ±30V钳位"] --> P["VBI5325 AC端"]
Q["RC缓冲网络 \n 10Ω+1nF"] --> R["VBI5325开关节点"]
S["栅极保护 \n 串联电阻"] --> T["所有MOSFET栅极"]
U["防静电结构 \n 并联电容"] --> V["敏感控制引脚"]
W["过流检测 \n 毫欧电阻"] --> X["电流检测放大器"]
X --> Y["快速比较器"]
Y --> Z["MCU中断"]
end
subgraph "降额设计与可靠性"
AA["电压降额 \n 80%额定值"] --> AB["VBI5325: <24V"]
AA --> AC["VBGQF1101N: <80V"]
AD["电流降额 \n 温升约束"] --> AE["VBGQF1101N: <30A"]
AD --> AF["VBKB2220: <4A"]
AG["热阻分析 \n θJA计算"] --> AH["结温<125°C"]
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style M fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBI5325规格书
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