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ACE1117C12XM+H bảng dữ liệu(PDF) 7 Page - ACE Technology Co., LTD. |
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ACE1117C12XM+H bảng dữ liệu(HTML) 7 Page - ACE Technology Co., LTD. |
7 / 11 page ACE1117C 1A Bipolar Linear Regulator VER 1.3 7 Thermal Considerations We have to take heat dissipation into great consideration when output current or differential voltage of input and output voltage is large. Because in such cases, the power dissipation consumed by ACE1117C is very large. ACE1117C series uses SOT-223 package type and its thermal resistance is about 20°C/W. And the copper area of application board can affect the total thermal resistance. If copper area is 5cm*5cm (two sides), the resistance is about 30°C/W. So the total thermal resistance is about 20°C/W + 30°C/W. We can decrease total thermal resistance by increasing copper area in application board. When there is no good heat dissipation copper are in PCB, the total thermal resistance will be as high as 120°C/W, then the power dissipation of ACE1117C could allow on itself is less than 1W. And furthermore, ACE1117C will work at junction temperature higher than 125°C under such condition and no lifetime is guaranteed. Typical Performance Characteristic Line Regulation ACE1117C-ADJ Vout vs. Vin Vin(V) Load Regulation ACE1117C-ADJ Vout vs. Iout Iout(A) |
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