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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) j. a3 g$ C1 a; `
series with CIN dampens the oscillation of input capacitance. : {- \; J; a! Z, z. K
2 |- t7 r$ k1 gThe device is designed to operate from an input voltage supply range between 4 V and 40 V. This input supply, r( @* C: }6 j* V
must be well regulated. If the input supply is located more than a few inches from the device, TI recommends7 b) O2 e0 ~+ y. ?7 W3 d' A! t
adding an electrolytic capacitor with a value of 47 μF and a ceramic bypass at the input.1 H8 e. f) M( R1 i
# N! k# ^, i/ ^) L7 B, S# E4 r
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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