33 lines
1.1 KiB
Markdown
33 lines
1.1 KiB
Markdown
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---
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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~~
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