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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- v }5 T: B8 K/ e$ I
series with CIN dampens the oscillation of input capacitance.
) c& ^6 s# H2 a8 a0 v
3 I2 Q% n4 ~9 X, S) I0 qThe device is designed to operate from an input voltage supply range between 4 V and 40 V. This input supply
4 i- I: g& M# p. q2 Z; H' U4 zmust be well regulated. If the input supply is located more than a few inches from the device, TI recommends
& X, _. R8 g2 q$ n/ Hadding an electrolytic capacitor with a value of 47 μF and a ceramic bypass at the input.
, d/ i/ o+ z, v' ~8 d* o* d: i3 f1 w' J: g
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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