Comparison of CBB film capacitors and MLCC

Nowadays, the number of mobile phones supporting wireless charging is increasing, and most mobile phone manufacturers do not give away wireless chargers, resulting in a large demand for wireless chargers. At present, when manufacturing wireless chargers, NPO MLCC is more expensive, and the cost is very high. CBB film capacitors are relatively cheap. Which one is better?

1. Wireless charging MLCC.

The wireless charger usually uses a 104/NPO material capacitor in a 1206 package. The NPO capacitor has high stability and low loss compared to a low-cost MLCC capacitor. The wireless charger internally uses a very low loss NPO capacitor in series with the transmitter coil to match the transmitter coil, producing an alternating electromagnetic field that can be received. However, the unit price of MLCC has risen in the past two years. Although there is a decrease in the current situation, there is still a problem of high cost in MLCC.

2. CBB film capacitors:

Polypropylene capacitors, CBB fall into this category. The main equivalence of film capacitors: no polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss.