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 charging the magnetic field is constantly generated, 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 a monitoring coilThe ambient temperature.
A temperature detecting NTC thermistor is buried next to the charging circuit and battery, and the MCU works together to track the instantaneous temperature change of the wireless charging operation.
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 methods, due to high charging voltage and large charging flow, a time-constant power type NTC thermistor can be set at the input voltage entrance of the transmitting end. To prevent or weaken the harmful impact of inrush current on 4 MOS tubes, so as to increase the life of MOS tubesIt's a wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, power full bridge, and LC resonant Tank composed of inductors and capacitors, where the inductor is the transmitting end coil.
There are two kinds of power supply for the radio energy transmission unit: 220V AC and 24V DC (such as automotive power supply), which is selected by relay J. In accordance with the principle of AC priority, the normally closed contact of relay J in the figure is connected to DC (battery BT1). Normally, S3 is connected.
But when loaded, generallyDesigned for 2x U input. The larger the filter capacitance, the higher the output voltage, and the lower the vice versa. In a single-phase bridge rectifier circuit, if there is no filter capacitor, the output voltage is 0.9 times of the AC input voltage when the load is open, that is, U output =0.9*U input. Under load, the formula remains the same: U output =0.9*U input. This conclusion is applicable to both bridge and full wave rectifier circuits.
Mobile phone wireless charging is a relatively novel charging method, the principle is actually very simple, is to separate the ordinary transformer primary and secondary levels to achieve the purpose of wireless. Of course, the working level of wireless charging is relatively high, evenThe core can be discarded and the energy transfer can be achieved directly between the coils. There are a lot of drawings, but will not send pictures, to mcu wireless charging you talk about the simplest wireless charging.
2, May, Apple submitted a "wireless power system" patent to show this innovative idea. Unlike previous battery cases, this new design does away with the lightning protection connector in favor of two-way wireless charging technology. According to the patent, the new battery case will be equipped with two sophisticated "switching circuit" wireless charging coils, meaning it will not only be able to charge itselfIt can also power a connected iPhone or other wireless device, enabling true wireless interaction.
3, Apple's new patent reveals the new possibility of wireless charging Recently, Apple Inc. submitted a new patent that has attracted wide attention in the industry. Unlike the common NFC technology on the market, Apple's patent seems to aim at the practical application and efficiency improvement of wireless charging technology.
WPC chip means Wireless Power ConsortiThe chip used in the wireless charging standard introduced by um (Wireless Power Alliance). It can realize the wireless charging function between different brands of smart devices, which is convenient for users to wireless charge in different occasions, without the use of cables and plugs. WPC chips have been widely used in smart phones, tablets, watches, headphones and other electronic devices. The main working principle of WPC chip is electromagnetic induction charging.
The more common SOCs are IDT, TI, COPO, purple light, etc. Most of the internal mobile phones are currently using IDT receiving schemes. TI receiver chip for the last two yearsNow they have downplayed the field of wireless charging. The integration of this chip is high and the efficiency is high, but the cost of a single chip is high and some additional functions cannot be added.
Apple's new iPad Pro and iPad Air will debut, M3 chip and wireless charging will shine: Well-known technology journalist Mark Gurman has revealed that Apple is expected to release a series of new iPad Pro and iPad Air tablets in late March or early April. Among them, the most notable is that they will be equipped with M3 chips, which are similar to the latest version of the MacBook Air,Promises more powerful performance. One of the biggest names when it comes to developing a truly wireless future is Energyous, which debuted its WattUp wireless charging technology last year. Now, it is working to make this technology more accessible thanks to the launch of its new DA2223 receiver chip, which is designed for small electronic devices such as smartphones. The chip itself measures 7x4x0.5 mm, making it a fraction of the size of a coin.
Auto MCU means motor controlunit (Motorcontrolunit), is to control the motor action module, MCU (MicroControllerUnit) is a microcontroller, mainly in the car's various peripheral circuits and interface circuit connection control, generally speaking, The most important thing is the reliability and temperature range, the temperature of the civil grade is generally 0-70, the industrial grade is 20-85, and the automotive grade is 40-85.
Automotive mcu is the motor control unit, that is, the module that controls the motor action. MCU, the microcontroller, is equivalent to the human brain and controls all electronic systems in the car, such as multimedia, audio, navigation, suspension, etc. It mainly connects and controls various peripheral circuits and interface circuits of the car. It is connected to all the circuits of the car and belongs to the central nervous system of the car.
MCU refers to the micro control unit, that is, MicrocontrollerUnit, also known as the single chip microcomputer is not the highest level. After upgrading the car mcu, it can improve the working efficiency of the car central regulation computer and make it more powerfulThe mcu upgrades due to navigation maps are constant.
Automotive MCU is the navigation satellite receiving antenna of the vehicle, located in the engine compartment of the vehicle, used to receive the positioning satellite position outside the earth to provide location information for navigation, the specific operation steps to find are as follows: Open the door on the side of the cab. Pull the hood switch on the left side of the driver's leg. Lift the engine hood up. Support the hood with a support rod to ensure that the support is strong to avoid danger.
1. SIT1043Q, as a member of SIT1043 series, is designed to meet the CAN communication requirements of in-car wireless charging. It is ISO 11898-2:2016 compliant, has a low-power standby mode and remote wake function, and a high voltage of ±58V. In addition, it supports a flexible data rate of 5Mbps CAN FD, ensuring high speed and accuracy of data transmission.