Post by tinayu001 on Jul 10, 2023 4:53:40 GMT
Mobile phone charger (also known as mobile phone adapter), is composed of a stable power supply (mainly voltage regulator power supply, providing stable working voltage and enough current) plus the necessary constant current, voltage limit, time limit and other control circuit.
Output parameters marked on the original charger (cable charge) : For example, output 5.0V/1A, output 5.0V/1500mA-11200...... Refers to the internal regulated power supply related parameters. With this in mind, you will know that a (good quality) phone charger is easy to change into a good quality regulated power supply!
Mobile phone lithium-ion battery charger is the constant current voltage limit charging system, charging current generally uses about C2 ----, that is, two hours charging rate, such as 500mAh battery with 250mA charging, about two hours to 4.2V after constant voltage charging.
Li-ion batteries are not suitable for fast charging using the -DV/DT detection method used in NIMH Battery Advanced Fast chargers, because Li-ion batteries have a strict limit on charging current. Lithium ions (Li+) are very active and can easily become dangerous when charged with a large current.
Those who know a little about electronics will remember that the traditional large transformer realizes the conversion of AC voltage through the turns ratio of the primary and secondary side winding of the transformer, and then realizes the constant voltage output through bridge rectification, voltage regulation filtering, and even voltage regulation chip.
The problem with the traditional charger is that the transformer must be large, and the electric energy is converted into magnetic energy for transmission. In order to transfer the electric energy of sufficient power, more turns are needed to generate enough magnetic energy, so as to complete the voltage conversion of high power. So the larger the current required to output, the larger the size of the transformer.
So why can chargers be made so small today?
The mobile phone charger uses a switch type power supply, which also has a transformer, as indicated in Figure 5. Then why can this transformer be so small compared with the traditional transformer? This is because the switching power supply by improving the frequency of the alternating current on the transformer, can make the transformer in the case of meeting the power requirements, maintain a small volume, this feature is very in line with the needs of modern electronic equipment.
Therefore, now there is still a transformer in the mobile phone charger, the difference is the high-frequency transformer, the same is the output end and 220V electricity is still through electromagnetic isolation.
The charger itself has no technical content, the biggest constraint is the cost, and the current false label is almost all copycats common. Charger does not have to buy the original, but must buy regular manufacturers. Ordinary mobile phone must be more than 1A current output, iPad and other tablets must buy 2A and above current output. High-current chargers can be used on low-current devices, so the iPad's 2A charger will charge into the 1A iPhone and other phones without a problem.
Output parameters marked on the original charger (cable charge) : For example, output 5.0V/1A, output 5.0V/1500mA-11200...... Refers to the internal regulated power supply related parameters. With this in mind, you will know that a (good quality) phone charger is easy to change into a good quality regulated power supply!
Mobile phone lithium-ion battery charger is the constant current voltage limit charging system, charging current generally uses about C2 ----, that is, two hours charging rate, such as 500mAh battery with 250mA charging, about two hours to 4.2V after constant voltage charging.
Li-ion batteries are not suitable for fast charging using the -DV/DT detection method used in NIMH Battery Advanced Fast chargers, because Li-ion batteries have a strict limit on charging current. Lithium ions (Li+) are very active and can easily become dangerous when charged with a large current.
Those who know a little about electronics will remember that the traditional large transformer realizes the conversion of AC voltage through the turns ratio of the primary and secondary side winding of the transformer, and then realizes the constant voltage output through bridge rectification, voltage regulation filtering, and even voltage regulation chip.
The problem with the traditional charger is that the transformer must be large, and the electric energy is converted into magnetic energy for transmission. In order to transfer the electric energy of sufficient power, more turns are needed to generate enough magnetic energy, so as to complete the voltage conversion of high power. So the larger the current required to output, the larger the size of the transformer.
So why can chargers be made so small today?
The mobile phone charger uses a switch type power supply, which also has a transformer, as indicated in Figure 5. Then why can this transformer be so small compared with the traditional transformer? This is because the switching power supply by improving the frequency of the alternating current on the transformer, can make the transformer in the case of meeting the power requirements, maintain a small volume, this feature is very in line with the needs of modern electronic equipment.
Therefore, now there is still a transformer in the mobile phone charger, the difference is the high-frequency transformer, the same is the output end and 220V electricity is still through electromagnetic isolation.
The charger itself has no technical content, the biggest constraint is the cost, and the current false label is almost all copycats common. Charger does not have to buy the original, but must buy regular manufacturers. Ordinary mobile phone must be more than 1A current output, iPad and other tablets must buy 2A and above current output. High-current chargers can be used on low-current devices, so the iPad's 2A charger will charge into the 1A iPhone and other phones without a problem.