To choose chip capacitors and electrolytic capacitors for replacement, we must first understand their respective characteristics. Driven by user experience, 74chips is committed to serving the small and medium-sized purchasers of electronic components, providing professional services such as genuine original products, professional consultation, and fast delivery.
? ? ?ESR, low loss, etc.
The characteristics of electrolytic capacitors: large capacity, low voltage, low frequency, large tolerance, large leakage current, large loss, etc.
It can be seen that the electrolytic capacitor can be replaced by the chip capacitor in most circuits under the condition of satisfying the capacitance value and withstand voltage. There are only two cases:
1. In the power output circuit, because some power supplies are aligned with the ESR, the range of ceramic capacitors is required to have a low ESR. Therefore, when replacing electrolytic capacitors with chip capacitors in such circuits, attention should be paid to ESR compensation;
2. (20Hz~20kHz) In audio circuits, ceramic capacitors have audio noise.
Replacing ceramic capacitors with electrolytic capacitors is more complicated. First, chip capacitors are non-polar. When replacing, pay attention to distinguish the polarity of the circuit and do not connect it wrongly.
Then it is whether the operating voltage and operating frequency of the circuit meet the rating of the electrolytic capacitor. Of course, electrolytic capacitors should also pay attention to temperature problems, and do not put them in high-power output circuits.
The replacement of ceramic capacitors and electrolytic capacitors still depends on the actual circuit application, not only on the surface property parameters, otherwise it will easily lead to various unstable factors of the circuit.