Today to share the knowledge of car wireless charging capacitor, which will also explain how to open the car wireless charger diagram, if you happen to solve the problem you are now facing, don't forget to pay attention to the site, now start!
< ul>What are the components of wireless charging? The left side is TX, which is the transmitting end, corresponding to productionIt'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.
Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side byProximity to the magnetic field generates an electric current that charges the phone.
This circuit diagram uses the chip sl1052 as the control, the structure is simple and the function is complete. Pin function 1 Power end. 2 Temperature monitoring input. 3 Charging status indicator. 4 Grounding terminal. 5 Adjust the tube driver. With the base of the external regulating tube. 6 Charging control. 7 Current sampling input. The charging current is determined by the voltage difference between the power supply and this pin.
Connect the phone's standard charger and data cable to the wireless charger, and then put the phone in the center of the left and right of the wireless charger baseSet, wireless charging can be achieved, the indicator light will have a breathing effect, 5 seconds after the extinguishment, plug and play, convenient and quick.
In short, C0G characteristics · High Voltage resistance MLCC with its unique advantages, such as high voltage resistance, stable temperature performance and miniaturization characteristics, is gradually becoming the first choice to replace traditional capacitors, especially in applications requiring high precision and durability. When making a replacement, fully understand its characteristics andPotential problems, choosing the right product solution, is the key to ensuring system performance.
Yuyang Technology recently launched an ultra-thin, low loss and high capacity MLCC product: 1206-C0G (NP0) -100nF-50V. This product has four advantages: low height, low ESR, low ESL and high reliability. Its height is as low as 0.85mm, which is at least 40% lower than the conventional 1206 height, and the spontaneous heat is small, the operating frequency range is better, and the stability is high. This product performs well in multiple market scenarios.
MLCC can be divided into the following categories: NP0, C0G, Y5V, Z5U, X7R, X5R, etc. NP0 and C0G have stable temperature characteristics, small capacity value and high price. Y5V, Z5U temperature characteristics, large capacity, low price; The X7R and X5R fall somewhere in between. According to the SIZE of the material. It can be roughly divided into 3223212011601000600402 The larger the value. SIZE is wider and thicker.
Y5V: poor temperature characteristics, but high dielectric constant, suitable for less stringent low-precision applications. Electrolytic capacitors: generally tantalum capacitors or aluminum electrolytic capacitors, this type of electricityThe principle is to convert the current into a magnetic field, and the magnetic field 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 alternating current through the 2M active crystal oscillator inverter to supply the primary winding.
3, because the charger and the electrical device are inductively coupled to transmit energy, the two are not connected by wires, so the charger and the electrical device can be no conductive contact exposed. Wireless charging mainly uses electromagnetic inductionMagnetic resonance, radio wave technology principle.
4, wireless charging system mainly uses 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.
5, 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. Orders,Previously, products supporting wireless charging have appeared in mobile phones, electric vehicles, smart furniture and other fields. 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.
1, front stop center control suction cup type car phone bracket: This bracket can be installed in the front windshield in the lower lower position. Because its position is close to the driver's line of sight, it can be convenient for the driver to use, while not blocking the line of sight, so it is moreFor the ideal choice. Air conditioning outlet type car phone holder: This holder can be inserted in the air conditioning outlet grille position.
2, air conditioning outlet type car mobile phone bracket installation is simple, generally inserted in the air conditioning outlet grille position can be. This installation method will not block the line of sight, and it is more convenient to use. Anti-slip pad type car phone bracket Anti-slip pad type car phone bracket can be placed on the instrument table is relatively flat, under the front stop position. This installation method is relatively simple, does not block the line of sight, and is more convenient to use.
3, this mobile phone stand is a sense of gravityShould be the configuration of unlimited charging, the experience may not be as comfortable as electric, but the price is a lot lower. And it uses the air outlet blade fixed way, compared with the suction cup longer and more stable life.
4, if the use is sticky (similar to the hook) kind of glue, directly pull it off. If it is screwed on, use a screwdriver to unscrew it. Welded on can only see or find a 4S shop to help replace an air outlet. Remove the vent and remove the support.
5, the car mobile phone holder is a very practical auto accessories, it can help the driver to fix the mobile phone in the car, fromIt does not affect driving safety, but also facilitates the use of mobile phones by drivers. The following is to introduce several practical types of car mobile phone bracket: spring car mobile phone bracket: This bracket uses the spring clamping method to fix the phone in the car, simple installation, suitable for most mobile phone models, and the price is more affordable.
6, Pinsheng car mobile phone bracket, car navigation alloy bracket, air outlet fixer, automotive supplies interior accessories, cost-effective, simple and practical, inexpensive, removable, easy to carry. Philips car mobile phone stand center control dashboard suction type navigation stand, car special mobile phone fixedSet the device, the quality is guaranteed, the mobile phone can be adjusted from a variety of angles, easy to operate with one hand.
In this circuit, the resonant frequency of inductor L1 and capacitor C1 is set to 1MHz. Because the circuit is in a resonant state, the no-load current is very small even if the receiving coil is not near the transmitting coil. At the receiving end, the resonance principle is also used to improve the efficiency of energy transmission. Schottky diode is used to rectify the signal, and after filtering capacitor processing, direct current is obtained, and then electricityPool charging. In the best working condition, the charging current can reach more than 0.6A.
The inductor L1 and the capacitor C1 have a resonant frequency of 1MHz, and because the circuit is resonant, the no-load current is small when the receiving coil is not near the transmitting coil. The receiving end also adopts the mode of resonance, which can maximize the transmission efficiency of energy, and the direct current is obtained by the filtered capacitor after the Schottky diode is rectified, and the charging current is above 0.6A. If the coil is made into a barrel shape, the transmission efficiency will be higher.
Wireless charging coil A6 three 3 coil - electricSensitivity 15uH. Inductance basic formula and inductance definition formula: L=μ×Ae*N2/l. Where: L represents the inductance, μ represents the magnetic permeability of the magnetic core, Ae represents the cross-sectional area of the magnetic core, N represents the number of turns of the coil, and lm indicates the magnetic circuit length of the magnetic core. Empirical formula: L= (k*μ0*μs*N2*S) /l. Among them. μ0 is the vacuum permeability =4π*10 (-7).
The wireless charger consists of two parts: the transmitter (TX) and the receiver (Rx). The TX end mainly includes an MCU, a power bridge, an inductor and a capacitor composed of LC resonant Tank, whichThe medium inductor is the coil at the transmitting end. The Rx end includes the MCU, the rectifier bridge, the LDO, the charger chip, the battery and the LC resonant Tank, and the coil at the receiving end is also composed of inductors. The power transmission of wireless charging is mainly accomplished by current and magnetic field.
The principle of wireless charging: electromagnetic induction. The charging base and the mobile phone terminal have built-in coils respectively. When the two are close, the generating coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then starting to supply power to the mobile phone from the charging seat. Magnetic resonance.
Through the two inductors, the energy is transmitted coupled, and the alternating current received by the secondary coil is converted into direct current through the receiving conversion circuit, which directly charges the battery. In addition to electromagnetic induction, capacitive coupling mode is also a common wireless charging method. In this mode, no inductor is required, but the electric field of the capacitor is used for energy exchange to achieve wireless charging.
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