Ceramic Capacitor Application: Non-Wire Phone Charger

With the emergence of 5G smartphones, the charger has also changed into a new style. There is a new type of charger, which does not require a charging cable to charge the mobile phone. The mobile phone can be charged only by placing it on a circular plate, and the charging speed is much faster. This is a wireless charger, so is this wireless charger really that easy to use?

Wireless charging is used in the charging of electronic products such as mobile phones. The core of its charging is wireless energy transmission technology. There are two types of wireless charging methods: electromagnetic induction charging and resonant charging.

Electromagnetic induction charging usually used in low-power electronic products, such as mobile phones while resonant charging is used in high-power electronics. For example, most electric vehicles use resonant charging.

Since energy is transmitted between the charger and the electrical device through a magnetic field, and no wires are connected to transmit energy between the two, the charger and the electrical device do not need to be connected with wires. A component inside the wireless charger is indispensable in order to realize wireless charging: the NP0 capacitor.

NP0 capacitor is a kind of ceramic capacitor, which belongs to class I ceramic capacitor. It has temperature compensation characteristics, low dielectric loss and high temperature stability. Its working environment temperature is -55℃～ 125℃. In this environment, the capacitance change of the NPO capacitor is small, so it is called a temperature compensation capacitor. It is suitable for oscillators, resonant circuits, high frequency circuits, and other circuits that require low loss and stable capacitance, or for temperature compensation.

The NP0 capacitor is connected in series with the transmitter coil inside the wireless charger to match the transmitter coil to generate an alternating electromagnetic field that can be accepted by the receiver.

The NP0 capacitor is small in size and does not take up space, and is suitable for use in products with high volume requirements such as wireless charging. The characteristics of low dielectric loss, high temperature stability, good working performance can improve wireless charging efficiency, reduce energy loss and wireless charging and heating.

With the wireless charging, it is much more convenient to charge the smartphone. You don’t need to spend time looking for the charging cable to plug in the mobile phone. You can charge the mobile phone directly on the wireless charger.

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