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Vehicle Charger Solution
Car charger, referred to as car charger. It refers to the car charger that is usually powered by the car battery, and is widely used in the lithium battery charging field of various portable and handheld devices. Such as: mobile phone, PDA, GPS, etc.; the car charger should not only consider the actual demand of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of the car battery (transient peak voltage, System switching noise interference, EMI, etc.); therefore, the power management IC selected for the car charging solution must simultaneously meet: high voltage resistance, high efficiency, high reliability, low frequency (beneficial to EMI design) switching power chip.
1. The principle of the car charger solution
It is to use the car cigarette lighter as a power socket to directly charge the mobile phone. Since the voltage provided by the car is relatively low, only an overload protection circuit is required inside the car charger. The front end of the car charger is designed with a fuse. When the current exceeds the acceptable range of the overload protection circuit, the fuse will blow immediately to protect it. In addition to charging mobile facilities, the car charger also has a GPS positioning function.
Some high-end car chargers generally include 2 USB ports, which can charge two digital products at the same time. Such products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection, and four safety protection functions to ensure safe use. The car charger can be used in the car as well as at home, realizing the three-in-one multi-purpose of car charging, direct charging, and USB charging. The car charger is an accessory for conveniently charging digital products anytime and anywhere with the car power supply, saving you battery costs. These products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection, and four safety protection functions to ensure your safe use.
2. Advantages of car charger solution
With the development of the automobile industry, on-board chargers are widely used, showing features such as safety, versatility, and fashion.
1. Safety: The car charger has passed various international safety performance tests such as CCC, UL, FCC, CE, etc., and has a computer automatic protection chip. It can be used with confidence no matter where it is, and provides good protection for your equipment when charging. . Car charger plug structure, built-in fuse, overvoltage current is too large, the fuse will automatically fuse to protect the safety of the machine. The car charger also has a USB interface, which supports various USB interface power output. Mobile products such as mobile phones and tablets can be charged through the power output interface.
2. Versatility: This car charger is equipped with four AC replacement connectors: American, British, Austrian and European; it integrates car charger, direct charger, and USB charger to meet charging conditions under different conditions; Dual USB output ports can charge multiple electronic products.
3. Fashionability: For car owners, a high-end consumer group, the fashionability of car chargers is also valued by manufacturers. Generally, it is made of ABS material and piano paint technology, which is not only fashionable and exquisite, but also feels very good.
Higher-end car chargers with GPS positioning function can realize functions such as real-time tracking, historical track playback, parking point query, collision alarm, speeding alarm and geo-fence alarm. It has a monitoring platform, which can be accessed through mobile phones and computers, and It provides APP download on the mobile phone, which is convenient for positioning. For young people who like to play Weibo and travel by car, a "Share" button is added on the mobile phone. You can choose the driving track for a period of time and share it with your friends. It is very practical.
3. How to use the car charger
1. Insert the USB car charger into the car cigarette lighter, and output DC voltage through the standard USB interface.
2. Electronic design parameters such as voltage and current fully comply with pda mobile phone standards, and will not cause damage to your beloved machine.
3. Connect the USB data cable to power and charge various electronic products such as MP3/MP4, mobile phones, small speakers, Bluetooth, and PSP.
4. Precautions for using the car charger
The car charger uses the car's cigarette lighter as an electrical outlet to charge the phone directly. Since the voltage provided by the car is relatively low, only an overload protection circuit is required inside the car charger. The front end of the car charger socket is designed with a fuse. When the current exceeds the acceptable range of the overload protection circuit, the fuse will blow immediately to protect it. Note that it can only be charged when the car engine is started.
Car chargers are also divided into two types: direct charging and dock charging. You can choose to buy a charger, that is, remove the battery and charge it, so as to avoid the phenomenon that the mobile phone is burned due to the instability of the vehicle power supply and the peak voltage output. If it is burned, it will also burn the battery to reduce losses. There are a variety of car chargers on the market to choose from. If you choose to shop online, you must go to a regular website to buy.
In order to use the car charger safely, you need to pay close attention to the following points:
1. The car charger should not be used at high temperature, especially when the temperature inside the car is too high in summer (generally over 45°C), remember to unplug the car charger. In addition, try to avoid random knocking, throwing, and vibration of the car charger during normal use. , otherwise it is easy to damage the internal circuit board.
2. Do not plug in and use the car charger before the vehicle engine is started, otherwise the voltage at startup may damage the car charger.
3. Some strong cleaning agents and chemicals will cause serious corrosion damage to the car charger, so be careful when cleaning.
4. Remember to unplug the car charger after the vehicle is turned off. Although the cigarette lighters of many vehicles will stop power supply after the key is unplugged, there are still many cars that continue to supply power.
5. The car charger should also avoid water ingress, or be placed in a humid environment for a long time, otherwise the internal components will be easily oxidized and corroded.
5. Possible reasons why the car charger cannot be charged
1. Voltage instability during charging leads to failure to charge
When starting up and charging, mobile phones or other smart electronic products generally start charging monitoring and detection procedures. If the program detects that the charging voltage of the vehicle is unstable, charging is prohibited. When using a seat charger, there will be no program for detection. It is recommended to use the usb interface of the car audio computer system to charge, no matter whether it is a line charger or a seat charger.
2. The parameters of the car charger do not meet the charging requirements
Check the output voltage and current of the car charger, and whether it supports your own digital products. Some parameters do not meet, for example, if a car charger with an output current of 1A is used to charge a tablet computer, it will not be charged. This is caused by insufficient current, and a high-power car charger needs to be replaced.
3. The contacts of the car charger are in poor contact
The contact design of some car chargers is unreasonable, and there will be poor contact during driving, which will lead to no charge after arriving at the destination.
4. The power supply of the cigarette lighter itself is abnormal
If you replace multiple car chargers, mobile phones, etc., you cannot use the car charger to charge normally in your car. At this time, you should check whether there is a problem with your car fuse.
5. The quality of the charger itself
There are many brands of car power supplies on the market now, the products are good and bad, and the price gap is large. If you buy fake and inferior products, not only will you not be able to charge the power, but you may also burn out the car fuse and digital products, and may even endanger personal safety. When purchasing a car charger, be sure to pay attention to choosing a safe and secure car charger.
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