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从手册上看：The input capacitor (CIN) compensates for line fluctuation. Using a resistor of approximately 1 Ω in1 J6 _, g% I8 _- K
series with CIN dampens the oscillation of input capacitance.
3 o7 v. x2 W9 M/ L( Y
& S w6 ~4 K8 i, \ ^* y) QThe device is designed to operate from an input voltage supply range between 4 V and 40 V. This input supply' Y& U( n' Q9 T! S" W& d. e
must be well regulated. If the input supply is located more than a few inches from the device, TI recommends
0 V- d* g2 r/ gadding an electrolytic capacitor with a value of 47 μF and a ceramic bypass at the input.
# i9 b1 V/ K. M; x8 E" O
7 c, U5 \' o6 h& C7 F* k* L; }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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