With the increase of electrical equipment in life, the requirements for reliability, convenience and timeliness of power supply are also increasing.
This three-in-one vertical magnetic absorption wireless charger has three charging areas, which can be charged at any location. It can also support three devices to charge at the same time, breaking the space limit and improving the charging efficiency.
Introduction to the appearance of wireless charging
This type of wireless charger is a vertical three-charge mode, which has a inclined magnetic absorption panel, a bottom flat panel and a rear flat panel. The overall color is black, and there is a small lightning icon prompt in the charging area. The shell has two sides of high-gloss treatment, the edge is smooth, the overall line is smooth, simple and generous.
In terms of appearance, it is a vertical structure with a clear layout of base+magnet+hanging charge.
During standby, pull the adapter to output 9V voltage for standby, and the power consumption is about 0.35W.
Single charge effect
The top magnetic chuck charges the iPhone14. The adapter outputs 9V driving voltage, the current climbs to 0.76A, and the power consumption is about 7.0W.
When the base is charging the third generation of AirPods, the adapter outputs 9V driving voltage, the current drops to 0.14A, and the power consumption is about 1.3W.
When the charging part charges the iWatch, the adapter still outputs 9V driving voltage, the current drops to 0.13A, and the power consumption is about 1.2W.
Three-charge effect
At the same time, charge the mobile phone, AirPods and iWatch. The adapter outputs 9V driving voltage, the current rises to 1.2A, and the power consumption is about 11.4W. This vertical wireless charger is equipped with a multi-charge protection device, which can prevent the phenomenon of charging disconnection and overheating, and improve the safety and reliability!
The base coil is a "universal oil", which can provide 1.5W~15W equipment charging in accordance with QI protocol.
Disassembly
Now let's disassemble the top magnetic attraction.
The annular suction cup composed of strong magnetic strips is placed with standard coils in the middle. The existence of strong magnetic absorption enables the mobile phone to obtain reliable charging efficiency. The magnetic chuck can be tilted at 90 °~135 °.
Now disassemble the machine and disassemble the base first. The coil and black paint PCB come into view. Below this is a piece of counterweight iron with full weight. The existence of this counterweight patch, in addition to being able to prevent tipping, has a full sense of weight.
This area is the voltage rise and fall circuit, which is responsible for converting the voltage into the voltage required by each coil.
Here is the drive MOS.
Polyester 330NF capacitor and standard coil form a low-cost resonant power transmission scheme.
358 dual operational amplifier is responsible for demodulating and shaping the decoded signal.
PH seat, the upper row supplies power to the base, and the lower row supplies power to the hanging charge.
QC circuit, the maximum 12V supply voltage can be obtained from the adapter.
LED status indicator light can indicate charging or fault status.
The main control board uses the APT32F1023 chip launched by Ketai Micro Technology. This chip is a 32-bit high-performance 32-bit microcontroller developed based on the RISC CPU core produced in China.
The characteristics of APT32F1023 chip are as follows:
·48MHz internal vibration
Fast and convenient to implement QI-EPP protocol
·All ports can trigger external interrupts on both sides
Port can be selected as decoding port
·64K Flash space, 4K RAM space
Large space, compatible with multiple private protocols
·3 sets of complementary 16-bit PWM with dead band
Driving coil charging
Complementary can realize half-bridge or full-bridge energy regulation
Dead zone can protect MOS and regulate energy at the same time
It can realize simultaneous charging of three devices with multiple coils
·2 sets of complementary 16-bit PWM
Realize EPP protocol and realize frequency shift communication between power supply coil and receiver coil
Realize the function of breathing light
·2 basic BT timers
BT0 is used to decode current and voltage and filter out clutter
BT1 is used to cooperate with ETCB to realize frequency shift communication
·ETCB linkage module
Multiple ADC can be converted together and read data simultaneously
Realize frequency shift communication or other applications that do not occupy interrupt resources
·17 touch pins
It is suitable for car wireless charging touch card to open or lock, or other functions
Next, let's look at the internal structure of the charging system, which is a group of coils+circuits.
After disassembly, last family photo
summary
By disassembling this three-in-one vertical wireless charger, it can be seen that the main control chip of the product is the 32-bit MCU with high reliability produced in China - APT32F1023, which is launched by Ketai Micro Technology. This design is based on the domestic RISC core architecture and its self-developed microprocessor IP library. It adopts the industrial standard design, with the main frequency up to 48MHz. It has rich peripheral interfaces, supports hardware CRC, independent divider, supports internal module interconnection trigger, carries enhanced PWM, 12-bit high-precision ADC, has Touch function, and has passed the CS 10V A test. At present, APT32F102X is widely used in industrial control, touch home appliances, consumer electronics, wearable devices and other fields.
