Provide design information for CX8571 external MOS synchronous rectification, high current DC-DC buck chip scheme, as well as CX8571 sample application and technical support!

The 70 mile car charger has a shape similar to a water cup, which is easy to fix on the cup holder inside the car Connect the charging interface between the front and rear seats through an extension cable to facilitate charging for rear passengers; While supporting USB output, the car cigarette lighter has been expanded to enhance practicality. From the disassembly of the 70 car charger below, it can be seen that this solution has been applied to two chips of Chengxin Micro Technology, CX8571 (synchronous rectification high current chip) and CX2901A (dual output 2.4A intelligent recognition chip)

Today we are bringing you the disassembly of a 70 car charger. This car charger is equipped with three USB charging interfaces and two cigarette lighter expansion interfaces, and supports a maximum power output of 60W. It can meet the power supply needs of devices such as mobile phones, driving recorders, and car fans, while also retaining the original functions of the car cigarette lighter.

Disassembling and disassembling the 70 MHz car charger product:

What about the CXW CX8571+CX2901A car charging chip solution? For details, please refer to the disassembly and analysis of the 70 MHz car charger

Disassemble the car charger, secure the input cable to the rear cover, secure the cable card, weld the input cable to the car charger socket, and connect it to the USB output board.

Synchronous rectification and voltage reduction controller, Chengxin Micro CX8571, reduces the voltage from 12-24V to 5V output.

Detailed information on CXW CX8571.

CX2901A dual automatic recognition IC.

What about the CXW CX8571+CX2901A car charging chip solution?

The 70 mile car charger uses synchronous rectification and voltage reduction internally, which has higher efficiency than asynchronous ones; The output adopts solid-state capacitors, which are non explosive for long-term use; Adopting the CX2901A automatic recognition chip, it can support most mobile phone charging and reduce compatibility issues.