33 lines
1.1 KiB
Markdown
33 lines
1.1 KiB
Markdown
---
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title: dcdc小模块
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updated: 2022-08-08 09:00:52Z
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created: 2022-05-07 10:02:34Z
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---
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# MAX15046模块
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/5RMB,默认输出5v,测试6A无压力。输出需接反馈电容470uF,不然不稳压。
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V=0.59*(1+R1/R2)
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12,输入
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34,地
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56,输出,与FB间串联电阻为120k。FB到地电阻为16k
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7,R1调谐。串电阻至FB,阻抗约3.72k。悬空时输出5V,6-7间串多圈可调电位器可调谐输出电压。可数字调压,见 [电阻调压改数字调压](../电阻调压改数字调压.md)
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8,使能,默认高
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# TPS40057模块
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1/8RMB,默认输出3.3v,测试6A无压力。~~输出需接反馈电容,不然不稳压。(板载已含)~~
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V=0.7*(1+R1/R2)
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L面为正
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124, 输出。串33R+15k至FB
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3,R1调谐。串电阻至FB,3-FB阻抗R1‘=3.2R+15k。3-4间串多圈可调电位器可调谐输出电压
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56,地
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78,输入
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10,R2调谐。默认R2=4k,10-FB串联阻抗R2’=1k,10串接电阻到地则与R2并联,悬空则不影响R2。
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可数字调压,见 [电阻调压改数字调压](../电阻调压改数字调压.md)
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11,使能
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~~3不接,10串4.7k到地则输出5.6V~~ |