wireless charging technology usually works on the principle of electromagnetic induction or magnetic vibration. At the transmitter, alternating current generates a changing magnetic field through the coil, which can induce current in another coil (located in the receiving equipment) near it, thus charging the equipment.
PCBA is a common integration method in modern electronic products. It solidifies the circuit design on one or more circuit boards, and fixes various semiconductor devices, resistors, capacitors, inductors and other components by welding or other means. In the field of wireless charging, PCBA usually includes the following parts:
1. Control chip: manages the whole wireless charging process, including voltage regulation, power control, communication and other functions.
2. power amplifier (PA): increase the signal strength to effectively transmit energy.
3. Oscillator and modulator: generate high-frequency AC signals for wireless transmission.
4. coil: used to generate or receive electromagnetic field, which is a key part of wireless charging.
5. protection circuit: to prevent overheating, overcurrent, short circuit and other abnormal situations, and to protect the safety of the system.
6. communication module: in some advanced wireless charging systems, it is used to exchange data with receiving equipment to realize more intelligent charging management.
Wireless charging and transmitting circuit boards are widely used in smart phones, wearable devices, electric toothbrushes, electric vehicle charging stations and other scenes that require wireless power supply. With the development of technology, the efficiency, distance and safety of wireless charging are constantly improving, and its application scope is also expanding.