graph TB
subgraph "三相PFC级"
A[三相AC输入] --> B[EMI滤波器]
B --> C[三相整流桥]
C --> D[PFC电感Lb]
D --> E[PFC开关节点]
E --> F["VBMB16R41SFD \n 600V/41A"]
F --> G[高压母线电容]
G --> H[高压直流母线]
I[PFC控制器] --> J[栅极驱动器]
J --> F
K[电压反馈] --> I
L[电流检测] --> I
end
subgraph "LLC谐振变换级"
H --> M[谐振电感Lr]
M --> N[谐振电容Cr]
N --> O[变压器励磁电感Lm]
O --> P[高频变压器初级]
P --> Q[LLC开关节点]
Q --> R["VBMB16R41SFD \n 600V/41A"]
R --> S[初级地]
T[LLC控制器] --> U[栅极驱动器]
U --> R
V[频率调制] --> T
W[ZVS检测] --> T
end
subgraph "缓冲与保护电路"
X[RCD缓冲电路] --> F
Y[RC吸收电路] --> R
Z[TVS阵列] --> J
Z --> U
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style R fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
同步整流与智能负载管理拓扑详图
graph LR
subgraph "同步整流桥臂"
A[变压器次级绕组] --> B[同步整流公共节点]
B --> C["VBM2104N \n P-MOSFET \n 33mΩ"]
C --> D[输出滤波电感Lo]
D --> E[输出电容Co]
E --> F[直流输出正极+]
B --> G["VBM2104N \n P-MOSFET \n 33mΩ"]
G --> H[输出地]
I[同步整流控制器] --> J[负压栅极驱动器 \n -10V驱动]
J --> C
J --> G
K[电流检测] --> I
L[时序优化] --> I
end
subgraph "智能负载开关通道"
M[MCU GPIO] --> N[电平转换电路]
N --> O["VBG3638 输入 \n 双N-MOSFET"]
subgraph O ["VBG3638内部结构"]
direction LR
IN1[栅极控制1]
IN2[栅极控制2]
S1[源极1输出]
S2[源极2输出]
D1[漏极1 VCC]
D2[漏极2 VCC]
end
P[12V辅助电源] --> D1
P --> D2
S1 --> Q[负载1:散热风扇]
S2 --> R[负载2:通信模块]
Q --> S[系统地]
R --> S
T[故障检测] --> M
U[PWM控制] --> M
end
subgraph "保护电路"
V[肖特基二极管] --> C
W[过流保护] --> I
X[温度监测] --> M
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style G fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style O fill:#fff3e0,stroke:#ff9800,stroke-width:2px
热管理与保护电路拓扑详图
graph TB
subgraph "三级散热系统"
subgraph "一级主动散热"
A[液冷板/风冷散热器] --> B["同步整流MOSFET \n VBM2104N"]
C[温度传感器NTC1] --> D[温度控制器]
D --> E[风扇PWM控制]
D --> F[泵速控制]
E --> G[冷却风扇阵列]
F --> H[液冷泵]
end
subgraph "二级强制风冷"
I[均热板+鳍片散热器] --> J["初级侧MOSFET \n VBMB16R41SFD"]
K[温度传感器NTC2] --> D
L[强制风道设计] --> J
end
subgraph "三级自然散热"
M[PCB敷铜散热] --> N["控制IC \n VBG3638"]
O[空气对流通道] --> N
end
P[热仿真优化] --> A
P --> I
P --> M
end
subgraph "电气保护网络"
subgraph "初级侧保护"
Q[RCD缓冲电路] --> R["PFC开关管"]
S[RC吸收电路] --> T["LLC开关管"]
U[TVS阵列] --> V[栅极驱动芯片]
end
subgraph "次级侧保护"
W[肖特基二极管] --> X["同步整流管"]
Y[过压保护] --> Z[输出端]
end
subgraph "故障诊断与保护"
AA[电流传感器] --> AB[比较器+ADC]
AC[电压检测] --> AB
AB --> AD[故障锁存器]
AD --> AE[关断信号]
AE --> R
AE --> T
AE --> X
AF[状态指示灯] --> AD
end
end
subgraph "PCB布局优化"
AG[厚铜箔设计3oz+] --> AH[功率路径]
AI[散热过孔阵列] --> AJ[接地层]
AK[最小环路面积] --> AL[同步整流回路]
AM[屏蔽走线] --> AN[栅极驱动]
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style J fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style N fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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