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从手册上看：The input capacitor (CIN) compensates for line fluctuation. Using a resistor of approximately 1 Ω in' L+ l. [" V4 S' d) k
series with CIN dampens the oscillation of input capacitance.
9 y8 h7 `9 Z k1 b# ^' }
S5 X4 A) A) O. P/ v* TThe device is designed to operate from an input voltage supply range between 4 V and 40 V. This input supply2 N( q6 ^9 m) @! S# q, T
must be well regulated. If the input supply is located more than a few inches from the device, TI recommends
4 `+ F6 M, C, y( O# \1 Zadding an electrolytic capacitor with a value of 47 μF and a ceramic bypass at the input. r0 ^8 f' N# q9 w- i) w1 U) j& H
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你前面的电容是贴片的陶瓷电容么？要不试下47uf电解电容？看到上面需要ESR接近1ohm的。 |
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发表于 2017-4-7 11:17
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支持！
反对！
发表于 2017-4-7 23:47
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