What do you want to ask is the resistance value of Apple wireless charging module? 100 ohms.According to the query cool rice network display. Apple wireless charging module can withstand 100 ohms of resistance Wireless charging temperature control resistance , Apple wireless charging is Qi wireless charging standard, which is a wireless charging standard developed by WPC.
And one of the factors affecting the chemical reaction rate is the temperature, when the ambient temperature is too low, the electrolyte resistance becomes larger, the chemical reaction rate decreases, and the current generated is relatively reduced. Therefore, the reason for the increase in battery power consumption in low temperature environments is actually that the current generated by the battery is reduced, resulting in a decrease in available power consumption, so it will feel when usedIt needs more power.
Cause Wireless charging temperature control resistance : 1: The wifi module is damaged. 2: System version BUG. It is recommended to restore the system version to fix the BUG. The operation is as follows: Step 1: Log in to the Apple official website to download itunes software, and open it after installation. Step 2: Connect the iphone6 puls to your computer with a cable. Step 3: In the summary interface, click "Restore iphone" and follow the itunes instructions to restore the system version.
iPhone consumptionFast electricity may be too many services opened in the background; It may also be the push function of mobile phone apps such as email, contacts and calendar that causes power consumption. You can choose to turn off some services running in the background, such as location services, wireless LAN and Bluetooth, iCloud Drive and photo streaming, and push notifications for infrequently used apps.
For example, VOOC flash charge increases the cross-sectional area of the resistance by increasing the number of lines of the charging cable/the number of battery contacts, reducing the resistance value and improving the carrying capacity of large current, while Huawei SuperCharge fast charge allows the charger to output low directly to the mobile phoneVoltage to avoid the high heat caused by the "high voltage to low voltage" conversion inside the fuselage.
From the previous mobile phone charging need a charging line to charge wireless temperature control resistance , to now wireless temperature control resistance wireless charging, it can be seen that the development of technology wireless temperature control resistance continues to improve. thermoelectricityThe typical characteristic of resistors is that they are sensitive to temperature and show different resistance values at different temperatures.
The thermistor in wireless charging has over current protection, over voltage protection, under voltage protection, temperature protection, short circuit protection, foreign body protection, overshoot protection, magnetic field protection and so on. In particular, the temperature protection design, because the magnetic field produces heat after the temperature, when the magnetic field is constantly generated when charging, the temperature will be higher and higher, so the temperature protection is installed in the NTC thermistor to monitor and protect the wireless charging, it is to monitor the temperature around the coil.
Insert a temperature next to the charging circuit and batteryThe temperature measuring NTC thermistor of degree detection, working together with the MCU, can track the instantaneous temperature change of wireless charging operation.
1, the thermistor in wireless charging has over current protection, over voltage protection, under voltage protection, temperature protection, short circuit protection, foreign body protection, overshoot protection, magnetic field protection and so on. Especially the temperature protection design, because the magnetic field produces heat after the temperature, when the magnetic field is constantly generated when charging, the temperature will be higher and higher, soNTC thermistors are installed in the temperature protection to monitor the protection of this wireless charge, which is to monitor the temperature around the coil.
2, buried in the charging circuit and the battery next to the temperature detection of the temperature NTC thermistor, and MCU together, you can track the instantaneous temperature change of wireless charging work.
3, wireless fast charging is monitored by the IC to measure the voltage of the charging system, while the NTC (negative temperature coefficient thermistor) is responsible for detecting the internal temperature of the system to prevent the temperature from being too high to cause the internal heat of the wireless charger system to burn components and other safety problems, and can be controlledThe components reduce the power when the temperature is too high, thus achieving the effect of reducing the temperature.
4, as far as possible to improve your wireless charging conversion efficiency optimize the control algorithm to enhance your heat dissipation effect plus heat sink or air cooling. The general wireless charging scheme will have a temperature control circuit and NTC thermistor, this function is mainly to prevent the heat generated by the circuit in the process of working is too high, burn components and so on.
5, the reason for the heat of the magnetic charging mobile phone case is: the temperature control circuit is faulty. Wireless charging schemes will come with temperature control circuits and NTC thermistors, whichThe function is mainly to prevent the circuit from generating too much heat in the process of working, burning components, etc., and can also control the power components after generating too much heat, reduce the power, thereby reducing the temperature.
6, for high-power wireless charging roads such as new energy buses and new energy load trucks, whether they use constant current or constant voltage charging, due to high charging voltage and large charging flow, a constant power type NTC thermistor can be set at the input voltage entrance of the transmitter. To prevent or weaken the harmful impact of the surge current on the four MOS tubes, so as to increase the life of the MOS tubes.2 >1, it is recommended that you use the standard charger to charge using other wireless charging temperature control resistance third party charger, although you can also charge the mobile phone wireless charging temperature control resistance , However, due to differences in charging specifications or charging protocols wireless charging temperature control resistance may cause problems such as heating.
2, the root cause of the high power wireless charging problem is that the high power wireless charging on the market now relies on high current to charge, but this is the caseThe situation is tantamount to increasing the resistance, thereby increasing its temperature, so it is necessary to use high heat absorption and high heat dissipation materials as the outer packaging, in addition, it is necessary to reduce the resistance accordingly, so as to fundamentally reduce the heating situation.
3, generally the use of metal heat dissipation can reduce the heat transfer to the mobile phone, thus affecting the mobile phone charging power, is bound to increase the metal block on the circuit board or coil, a bit similar to the notebook CPU plus copper tube heat dissipation. Or increase the active fan heat dissipation, and use the fan to cool the motherboard and coil, which can achieve the delay power reduction time.
5, millet wireless charging mainly relies on the electromagnetic coil scheme for energy transfer, if there are too many obstacles between the coils, it will not only affect the charging power, but also lead to the aggravation of the heating problemIt is also recommended that you take off the heavy mobile phone case when wireless charging, and let the mobile phone lie naked on the wireless charging seat.
Improve your wireless charging conversion efficiency as much as possible, optimize the control algorithm, enhance your heat dissipation effect, add heat sink or air cooling. The general wireless charging scheme will have a temperature control circuit and NTC thermistor, this function is mainly to prevent the heat generated by the circuit in the process of working is too high, burn components and so on.
Wireless chargingIt is normal for mobile phones to get hot, but overheating can be dangerous. Wireless charging technology uses the principle of magnetic coupling to transfer power between the transmitter and the receiver. In this process, part of the electrical energy will be converted into heat, causing the phone and charger to heat up. This is a common phenomenon of wireless charging and does not mean there is a danger.
The reasons for this are as follows: Too many background programs: you can properly close the background running; Caused by abnormal mobile phone charger: When replacing the mobile phone charger, it is necessary to replace the charger that matches the mobile phone according to the model of the mobile phone.
1. Top right corner of the back panel of the mobile phone. The iPhone12 is a mobile phone product released by Apple at 1:00 am on October 14, 2020, Beijing time, at ApplePark Headquarters, and the official information shows that the thermistor position of the Apple 12 mobile phone is in the upper right corner of the wireless charger on the back of the mobile phone.
2. The display becomes dark or black. Cellular mobile radio components enter a low power state. During this time, the signal may weaken. The camera flash is temporarily unavailable. Use graphics intensive orPerformance slows when augmented reality applications or features are applied. Note: The abbreviation for Negative Temperature Coefficient (NTC) is embedded in several circuits of the iPhone. Its meaning is negative temperature coefficient, thermistor.
3, this is because there is a temperature detection system in the circuit design of iOS devices, and there is a complete temperature protection mechanism. The overtemperature protection mechanism can effectively protect the iPhone motherboard circuit and the original to avoid the original from being damaged by its own fault.
4, open too much software, background anyToo much work, a program occupies hardware resources and consumes too much heat. For example, navigation, video recording and other applications can be closed or restarted. The use of beta system, due to the imperfection of the system, resulting in high power consumption and high heat of the mobile phone. Restore the system to the latest official version.
5, according to the temperature coefficient is divided into positive temperature coefficient thermistor and negative temperature coefficient thermistor. The resistance value of positive temperature coefficient thermistor increases with the increase of temperature, and the resistance value of negative temperature coefficient thermistor decreases with the increase of temperature.
6, in turn, use the mobile power USB-C port to charge the iPhone 12 Pro, and the charging power is 9V 2A 18W. Momis magnetic wireless charging mobile power disassemble the back leather bottom cover of the fuselage is torn off, and the edge of the shell is packaged with multiple screws, which is very firm. Remove the screws to open the case. The fuselage groove is embedded with a plastic frame, and the corresponding USB-C base is provided with a protruding fixed support plate, and the corresponding LED light is provided with an isolation slot to prevent crosstalk.