MIC2141

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1. /*
   
2. IC简介：
   
3. MIC2141是一款高效率，同步整流，3A低压降升压转换器。它可以在输入电压从2.7V到5.5V的范围内工作，并提供高达93％的效率。此芯片使用外部同步开关，提供1.2MHz固定频率。
   
4. 
   
5. 功能：将输入电压升高到输出电压，并提供高效率
   
6. 
   
7. 电压宽度：2.7V-5.5V
   
8. 
   
9. 温度范围：-40°C至+125°C
   
10. 
    
11. 注意事项：
    
12. 
    
13. 请在正确的电气条件下使用此芯片
    
14. 需要提供外部同步开关
    
15. */
    
16. 
    
17. #include <reg52.h>
    
18. 
    
19. // 定义MIC2141寄存器地址
    
20. #define REG_MODE_CONTROL 0x00
    
21. #define REG_SOFT_START   0x01
    
22. #define REG_SWITCH_CTRL  0x02
    
23. #define REG_OVER_VOLTAGE 0x03
    
24. 
    
25. // 定义MIC2141模式控制寄存器位
    
26. #define MODE_CONTROL_EN       0x80
    
27. #define MODE_CONTROL_SS_MASK  0x70
    
28. #define MODE_CONTROL_SS_2MS   0x00
    
29. #define MODE_CONTROL_SS_4MS   0x10
    
30. #define MODE_CONTROL_SS_8MS   0x20
    
31. #define MODE_CONTROL_SS_16MS  0x30
    
32. #define MODE_CONTROL_SS_32MS  0x40
    
33. #define MODE_CONTROL_SS_64MS  0x50
    
34. #define MODE_CONTROL_SS_128MS 0x60
    
35. #define MODE_CONTROL_SS_256MS 0x70
    
36. 
    
37. // 定义MIC2141开关控制寄存器位
    
38. #define SWITCH_CTRL_ENABLE     0x80
    
39. #define SWITCH_CTRL_SYNC       0x40
    
40. #define SWITCH_CTRL_FREQ_MASK  0x38
    
41. #define SWITCH_CTRL_FREQ_400K  0x00
    
42. #define SWITCH_CTRL_FREQ_600K  0x08
    
43. #define SWITCH_CTRL_FREQ_800K  0x10
    
44. #define SWITCH_CTRL_FREQ_1000K 0x18
    
45. #define SWITCH_CTRL_FREQ_1200K 0x20
    
46. #define SWITCH_CTRL_FREQ_1400K 0x28
    
47. #define SWITCH_CTRL_FREQ_1600K 0x30
    
48. #define SWITCH_CTRL_FREQ_1800K 0x38
    
49. 
    
50. // 定义MIC2141过压保护寄存器位
    
51. #define OVER_VOLTAGE_ENABLE       0x80
    
52. #define OVER_VOLTAGE_VOLTAGE_MASK 0x7F
    
53. 
    
54. // MIC2141寄存器值
    
55. unsigned char modeControlRegValue;
    
56. unsigned char softStartRegValue;
    
57. unsigned char switchCtrlRegValue;
    
58. unsigned char overVoltageRegValue;
    
59. 
    
60. // 初始化MIC2141
    
61. void initMIC2141()
    
62. {
    
63.     modeControlRegValue = MODE_CONTROL_EN | MODE_CONTROL_SS_16MS;
    
64.     softStartRegValue   = 0x10; // 2ms
    
65.     switchCtrlRegValue  = SWITCH_CTRL_ENABLE | SWITCH_CTRL_FREQ_1200K;
    
66.     overVoltageRegValue = OVER_VOLTAGE_ENABLE | OVER_VOLTAGE_VOLTAGE_MASK;
    
67. }
    
68. 
    
69. // 设置MIC2141输出电压
    
70. void setMIC2141OutputVoltage(unsigned int outputVoltage)
    
71. {
    
72.     unsigned char highByte, lowByte;
    
73.     unsigned int dacValue;
    
74.     // 计算DAC值
    
75.     dacValue = (outputVoltage * 4096) / 3200;
    
76. 
    
77.     // 将DAC值分成高8位和低8位
    
78.     highByte = (unsigned char)((dacValue >> 8) & 0x0F);
    
79.     lowByte  = (unsigned char)(dacValue & 0xFF);
    
80. 
    
81.     // 写入MIC2141模式控制寄存器
    
82.     modeControlRegValue &= ~MODE_CONTROL_SS_MASK;
    
83.     modeControlRegValue |= MODE_CONTROL_EN | MODE_CONTROL_SS_2MS;
    
84.     writeMIC2141Reg(REG_MODE_CONTROL, modeControlRegValue);
    
85. 
    
86.     // 写入MIC2141软启动寄存器
    
87.     writeMIC2141Reg(REG_SOFT_START, softStartRegValue);
    
88. 
    
89.     // 写入MIC2141开关控制寄存器
    
90.     switchCtrlRegValue |= SWITCH_CTRL_SYNC | SWITCH_CTRL_FREQ_1200K;
    
91.     writeMIC2141Reg(REG_SWITCH_CTRL, switchCtrlRegValue);
    
92. 
    
93.     // 写入MIC2141过压保护寄存器
    
94.     writeMIC2141Reg(REG_OVER_VOLTAGE, overVoltageRegValue);
    
95. 
    
96.     // 写入DAC高8位和低8位
    
97.     writeMIC2141Dac(highByte, lowByte);
    
98. }
    
99. 
    
100. // 写MIC2141寄存器
     
101. void writeMIC2141Reg(unsigned char regAddr, unsigned char regValue)
     
102. {
     
103.     // TODO: 实现MIC2141寄存器写入
     
104. }
     
105. 
     
106. // 写MIC2141 DAC值
     
107. void writeMIC2141Dac(unsigned char highByte, unsigned char lowByte)
     
108. {
     
109.     // TODO: 实现MIC2141 DAC值写入
     
110. }
     
111. 
     
112. // 主函数
     
113. void main()
     
114. {
     
115.     // 初始化MIC2141
     
116.     initMIC2141();
     
117.     // 设置输出电压为3.3V
     
118.     setMIC2141OutputVoltage(3300);
     
119. }
     

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