I got the charging head networkBYD-A front mounted car charger with dual USB-A ports on the Han model. This car charger uses a black shell, is fixed with clips, and is connected to power supply through pins.This car charger uses Chengxin micro car scale synchronous step-down converter CX8576Q+fast charging protocol chip CX2601, which supports fast charging output. It actually supports FCP, AFC, QC3.0 fast charging, and can meet the fast charging needs of mainstream Android phones.Next, the analysis and power on test will be carried out for this front mounted car charger, and the materials and design of this car charger will be displayed.
BYDThis car charging connector module is made of PC+ABS plastic shell, and its top surface is frosted and fingerprint resistant.
The front end of the fuselage is equipped with dual USB-A interfaces, and the battery charging logo is printed beside the interface.
Close up of USB-A port, with white rubber core.
The back of the machine body is equipped with a power socket, and the right housing is printed with relevant information about the module.
The slots are yellow with four pins inside.
The information on the right housing shows that the module brand isBYDThe shell is made of PC+ABS fireproof material.
There is a sticker on the top of the fuselage, which is printed with the module name and other information.
Positioning plates are set on the top and both sides of the fuselage to facilitate early assembly.
The shell is divided into front and rear parts, which are spliced and fixed by clips.
The measured length of connector module is 48.8mm.
The width is 52.15mm.
The thickness is 24.14mm.
BYDThe size of the connector module in the hand is intuitive.
In addition, the measured net weight of the module is about 33g.
Disassembly of BYD Han on-board charging connector
BYD's double A port car charger is fixed with clips, which can easily take out the internal PCBA module.
The internal connector of PCBA module adopts yellow plastic shell and is fixed with screws.The mother seat of USB-A port adopts translucent plastic support for light guide lighting.
The length of PCBA module measured with vernier caliper is about 47.32mm.
The width of PCBA module is about 42.46mm.
The thickness of PCBA module is about 10mm.
At the front of the PCBA module of the car charger, the yellow power input socket is welded, the left side is the filter inductance and filter capacitor, and the lower side is welded with two step-down inductors and output filter capacitors, as well as the corresponding two protocol chips.
TVS diode is welded on the back, anti reverse Schottky diode, and two synchronous step-down chips.There are two independent fast charging circuits inside the car charger, corresponding to two USB-A interface outputs.
The power input interface is yellow.
The connector is fixed with screws.
Close up of MLCC filter capacitor.
The input TVS comes from Meili Micro, SMBS28CA, which is a 28V two-way TVS for overvoltage surge protection.
Schottky diode for anti reverse connection is from Meili Micro, model SS1040.
The output is filtered by a magnetic bead.
The input terminal adopts a 4.7 μ H alloy inductance for filtering.
The input filter capacitance specification is 100 μ F 25V.
This car charger has a built-in Chengxin micro CX8576Q car gauge level synchronous step-down converter, which is a 36V input withstand voltage, 4.8A output current synchronous step-down converter, and conforms to AEC-Q100 car gauge certification.Integrated power MOS in the chip supports external current limit setting, programmable switching frequency, and built-in adjustable line loss compensation.The chip has constant voltage and current control and cycle by cycle current limitation, and is packaged with QFN5 * 5-20L.
Chengxin Micro CX8576Q information.
After disassembling the charging head network, we learned that Chengxin MicroAC-DC、DC-DCFast charging scheme has won LenovoLixun, AohaiMotorola、DJI、Belkin、AT&T、Hikvision、Taste、Feather Bo、PhilipsThe chip performance and quality have been unanimously recognized by customers.
Close up of 22 μ H alloy step-down inductance corresponding to CX8576Q.
The output filter capacitor specification is 220 μ F 25V.
Close up of 27m Ω current sampling resistance for interface overcurrent protection.
The other USB-A port also uses the Chengxin micro CX8576Q vehicle specification level synchronous step-down converter.
Close up of 22 μ H alloy step-down inductor used together.
220 μ F 25V output filter capacitor.
27m Ω resistor is used for USB-A interface overcurrent protection.
The USB-A port protocol chip is from Chengxin Micro, model CX2601. It is a multi protocol fast charging protocol chip that can automatically switch the applicable fast charging protocol for connected devices. It supports Huawei FCP fast charging, Samsung AFC fast charging, QC3.0 and QC2.0 fast charging, and Apple 2.4A charging.The CX2601 also supports the control of the high-voltage fast charging function through the EN pin, which makes the application more flexible.The chip supports fast charging adapter, car charging, mobile power supply and other applications, and adopts SOT23-6 packaging.
Data information of Chengxin Micro CX2601.
Another USB-A interface also uses the Chengxin micro CX2601 fast charging protocol chip.
The voltage stabilizing chip which supplies power for LED indicator is screen printed with ABPKY.
Close up of LED lamp illuminating USB - A port.
Close up of another LED light.
USB-A interface is fixed by via welding, with white rubber core.
The other USB-A port is also a white rubber core.
Finally, power on the PCB, and use ChargeLAB POWER-Z KM003C to measure that the USB-A port supports the charging protocols of FCP, AFC, QC3.0, and DCP.
The compatibility protocol of the other USB-A port is the same.
Take a look at all of them and have a family photo.
Disassembly summary of charging head network
BYD's dual USB-A port car is front mounted, with a black shell, which is fixed on the cover plate with a snap, and the shell is also fixed with a snap, which is convenient for assembly.The car charger uses a pin to connect the power supply, and provides two USB-A quick charging interfaces. The built-in indicator lamp is convenient to find the car charging position, and supports the quick charging output, meeting the quick charging needs of mainstream Android phones.
Through disassembly, the charging head network learned that the Chengxin micro CX8576Q vehicle gauge level synchronous step-down converter is used inside the car charger to achieve the function of step-down and fast charging with CX2601 protocol chip. The step-down converter has built-in MOS tubes, which has perfect protection functions and simplified peripheral components, and is very suitable for the application of step-down circuits such as car charging.
The CX2601 supports Huawei FCP fast charging, Samsung AFC fast charging and QC3.0 fast charging. It also supports Apple 2.4A charging, and supports EN pin control fast charging output. The chip has low standby power consumption and flexible use.A few days ago, Chengxin Microtech's car scale chips have officially entered a number of vehicle manufacturers, such as BYD, Chang'an, Geely, Gerkrypton, Chery, Interworld and other mainstream automobile brands.The cooperation with well-known automobile enterprises has proved that its products have many advantages in performance, quality and reliability.In the field of front mounted vehicle charging, Chengxin Micro has launched rapid charging solutions of different power sections, providing customers with more choices and accumulating energy for promoting the development of new energy vehicle industry.