Car chargers are widely used in our driving trips. When the mobile phone is dead or low, we will directly use the car’s car charger to charge the mobile phone, so that the mobile phone can be used normally when it is powered. . If the car charger cannot be charged, there are generally the following two situations.
1: Not compatible
If the car charger is not compatible with your mobile phone, it will not be charged. If it is not fully compatible, the charging current will be small.
If it is compatible, the quality of the car charger is too poor, the output current is too small, the charging effect is not obvious, and it will feel that it is not charged.
The car charger directly charges the mobile phone with the car cigarette lighter as the power socket. Since the voltage provided by the car is low, the car charger only needs an overload protection circuit. The front end of the car charger socket is designed with a safety tube. When the current exceeds the allowable range of the overload protection circuit, the fuse will immediately blow to protect it. Note: The engine must be started before charging!
Regarding the car charger, there are the following precautions:
Do not use the car charger in a humid environment. Do not store the car charger in a humid environment. Use it at a suitable temperature of 0-45°C. Keep away from children and avoid lightning strikes. Unplug the charger in time after charging.
On-board chargers refer to the on-board chargers that are conventionally powered by car batteries (12V for cars and 24V for trucks), which are widely used in the field of lithium battery charging for various portable and handheld devices.
Such as: mobile phone, PDA, GPS, etc. Car chargers must not only consider the actual needs of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also consider the harsh environment of the car battery (transient peak voltage, system switching noise interference, EMI, etc.). ); Therefore, the power management IC selected in the vehicle charging scheme must meet the high-voltage, high-efficiency, high-reliability, and low-frequency (conducive to EMI design) requirements of the switching power supply chip.