The charger is hot, and sometimes there is a burnt smell, indicating that there is a problem with the internal circuit, do not use it again to avoid spontaneous combustion or burning. The charger (charger) can be divided into power frequency machine and high frequency machine according to the working frequency of the design circuit. The power frequency machine is designed based on the traditional analog circuit principle, the internal power devices (such as transformers, inductors, capacitors, etc.) are larger, and there is generally less noise when the load is larger, but the model has strong resistance performance in the harsh grid environmental conditions, and the reliability and stability are stronger than the high-frequency machine. There are many chargers, such as lead-acid battery charger, valve-controlled sealed lead-acid battery testing and monitoring, nickel-cadmium battery charger, nickel-metal hydride battery charger, lithium-ion battery charger, portable electronic device lithium-ion battery charger, lithium-ion battery protection circuit charger, electric vehicle battery charger, car charger, etc. Battery charger: It is specially designed for charging the lead-acid maintenance-free battery or battery group widely used in the market, and the whole machine is small in size, light in weight and easy to move.
It smells burnt and can't be used.
It is normal for the charger to be a little hot when charging, as long as there is no odor, it is not necessary to care about it, but it is best to put it in a ventilated place, because the heat will accelerate the aging of electronic components.
When the mobile phone is charging, the charger heat is normal, there is a loss of AC and DC power in the conversion, the general charger uses a switching power supply with higher efficiency, but is limited by the volume, so there is basically no PFC circuit, so the power factor is less than 0.7, and the rest of the energy is basically converted into heat.