Today to share the knowledge of mobile phone wireless charging sensor chip, which will also explain where the mobile phone wireless charging sensor, if you happen to solve the problem you are now facing, don't forget to pay attention to the site, now start!
< ul>Wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
Wireless charging, also known as inductive charging, non-contact inductive charging, from wireless power transmission technology, is the use of near-field induction, that is, inductive coupling, by the power supply device (charger) to transmit energy to the power device, the device uses the received energy to charge the batteryElectricity, and at the same time for its own operation.
Wireless charging system mainly adopts the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the latest wireless charging technology, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
The principle of wireless charging technology is "magnetic electricity", simply put, through the charging device and the mobile phone device installed on the two "magnetic equipment" mutual induction and formation of current. Currently on mobile phone,Electric vehicles, smart furniture and other fields have appeared to support wireless charging products. Among them, in the mobile phone industry, the "Qi standard" is the most common, and Qi labels are often used in the packaging of many mobile phones and wireless chargers.
The basic principle of wireless charging is to convert the current into a magnetic field, which is transmitted through the air and then converted into a current to be transmitted to the intelligent terminal. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. After passing through the power management module, the output direct current is converted into high frequency by 2M active crystal inverterAlternating current is supplied to the primary winding.
Using the principle of electromagnetic induction charging equipment, its principle is similar to the transformer, through the transmitter and receiver end set coil, transmitter coil under the action of power to send electromagnetic signals, the receiving end coil receives electromagnetic signals and convert electromagnetic signals into current, so as to achieve the purpose of wireless charging.
1, the more common SoC are IDT, TI, COPO, purple lightAnd so on, most of the internal mobile phones are currently using IDT receiving schemes. Texas Instruments TI receiver chips used more in the first two years, and now 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.
2, SC9625 as a receiver, can provide 50W (20V / 5A) output power for the downstream charger system. As a transmitter, it can support up to 15W of output power to other wireless receivers.
3, blanking semiconductor (CPS) Focus on the field of wireless charging, providing high-performance wireless charging IC solutions, its product CPS4021 is an integrated wireless charging receive/transmit function SoC chip, suitable for a variety of devices, including mobile phones, tablets, smart watches, mobile power supplies and power tools.
4, the most used is Ti's chip, about 12 pieces. There are many options for launch, and we're one of them.
5, wireless charger how to choose QI standard: wireless charging currently has two major international mainstream industry standards. One is QI from the Wireless Charging Alliance (WPC)Standard, another is AirFuelAlliance. These two standards have strict certification standards for the energy, technical parameters, compatibility, and safety of wireless charging products.
The mobile phone charging base generates a high-frequency alternating magnetic field. When the mobile phone is placed on the charging base, the alternating magnetic field will generate a high-frequency alternating voltage inside the mobile phone through the induction coil in the mobile phone, and then convert the high-frequency alternating voltage into a rectifier circuit in the mobile phoneDirect current to charge the phone.
This phenomenon is called "magnetic resonance", which is used for wireless charging, which can make the charging distance reach several meters, and the efficiency is also improved. The only difficulty is to adjust the two circuits to the exact same frequency and maintain it for some time.
Magnetic wireless charging purpose From the user's point of view, the most personally felt change is that magnetic wireless charging makes charging more convenient, more reliable, mobile phone charging efficiency is higher, faster, and mobile phone heating is less. At the same time, we can also feel that the adoption of Apple's magnetic wireless charging scheme not only solves the problem of wireless chargingWhat does the connected chip do? What is not connected to the output? _ Baidu... '> What is the role of the chip connected to the receiving end of the wireless charging coil? What is not connected to the output? _ Baidu...
1, AP45851 compatible with high power output, chip compatible with Qi fast charge protocol (5/9/12V application), in line with the latest Wireless charging Alliance (WPC) Qi version specifications. The AP45851 uses a unique "CNS-chip as system" technology to fully integrate a variety of high-performance mixed-signal functions, such as low-power device detection during standby, for safetyForeign object Detection (FOD) with full wireless charging.
2, wireless charger refers to the use of electromagnetic wave induction principle for charging equipment, the principle is similar to a transformer. There is a coil in the sending end and the receiving end. The sending end coil is connected to the wired power supply to generate an electromagnetic signal, and the receiving end coil senses the electromagnetic signal of the sending end to generate a current to charge the battery.
3, wireless charger receiving antenna is a key part of the wireless charging device, its role is similar to the secondary coil of the transformer, responsible for receiving the energy from the charger and converting it into electricity that the device can use. This article will be on noneThe wire charger receiving antenna is introduced in detail, and its role in wireless charging system is briefly summarized. In the wireless charging system, the receiving antenna and the charger cooperate to complete the energy transmission.
4, the sending end coil is connected to the wired power supply to generate electromagnetic signal, and the receiving end coil senses the electromagnetic signal of the sending end to generate current to charge the battery; The magnetic field strength of the coil can be enhanced by attaching a magnetic separator to the antenna at the transmitting end, and the magnetic convergence effect is higher. A magnetic separator is placed on the receiving antenna to prevent the attenuation interference of the metal conductor on the magnetic field, play the role of metal isolation, prevent energy waste, and improve chargeElectrical efficiency.
5, the wireless charger uses the electromagnetic wave induction principle to charge, similar to the working principle of the transformer. There is a coil in the sending end and the receiving end. The sending end coil is connected to the wired power supply to generate an electromagnetic signal, and the receiving end coil senses the electromagnetic signal of the sending end to generate a current to charge the battery. Electromagnetic induction charging This is currently the most widely used scheme, the circuit structure is relatively simple, the cost is low, but the transmission distance is short, affected by the location.
6, the use of electromagnetic induction principle for charging equipment, the principle is similar to the transformer, through the transmitter and receiver end setThe transmitting end coil sends an electromagnetic signal under the action of power, and the receiving end coil receives the electromagnetic signal and converts the electromagnetic signal into current, so as to achieve the purpose of wireless charging.
Wireless charging PCB, different functions, the required components are different. The required components are: resistor, capacitor, resonant capacitor, resonant coil, MOS tube, controlChip making, protocol chip.
Wireless charging requires a chip inside the device to receive electromagnetic waves and electromagnetic fields, and the nova8 does not have this chip. In addition, wireless charging is not as efficient and fast as wired charging, so it may not be necessary for all users. The nova8 does not currently support wireless charging, but it does support 40W wired fast charging, which can be quickly charged in a short time. If you need wireless charging, you can choose other mobile phones that support wireless charging.
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