In order to welcome the release of Iphone16 series, CXW technology launch this 40W dual USB-C port GAN fast charging solution. The charger supports dual-port power blind insertion, both interfaces support 40W output, and the power can be automatically distributed when both ports output at the same time, and both ports support fast charging, which meets the requirements of two devices for fast charging at the same time.

CXW technology 40W dual USB-C GaN fast charging solution reference design appearance:

     This reference design adopts CXW CX75GD025E GaN integrated IC and CX7539F synchronous rectifier IC, which greatly simplifies the circuit design of the charger and reduces the number of components. CX75GD025E is internally sealed with GaN switch tube and high-performance quasi-resonant controller, which supports 45W application. CX7539F integrates synchronous rectifier tube and controller, which supports multiple working modes and meets the requirements of six-level energy efficiency. The output end of DEMO is equipped with dual C output interfaces, in which the USB-C socket is welded by protocol small board. Thanks to the highly integrated and modular design, CX75GD015E+CX7539F has outstanding advantages. In the small and portable aspect, the product competitiveness has been improved.

     This 40W dual USB-C port GaN fast charging scheme supports many mainstream charging protocols in the market, such as QC3.0/QC4+, AFC, FCP, SCP and Apple2.4, which can intelligently identify devices and match the best charging mode. Whether it is a mobile phone, a tablet or a notebook, you can get a fast and stable charging effect.

     PDO message shows that USB-C port has five groups of fixed voltage gears and current combinations, 5V3A, 9V3A, 12V3A, 15V2.67A and 20V2A, and three groups of PPS voltage gears, 3.3-11V3A and 3.3-21V2A.

CXW 40W dual USB-C port GaN fast charging solution DEMO:

     The front of PCBA is welded with NTC thermistor, X capacitor, electrolytic capacitor *3 and 1 common mode choke, two blue Y capacitors and 2*USB-C female socket (the protocol is located between the two small boards). The upper left corner is welded with synchronous rectifier IC, solid capacitor, and its right side is welded with transformer. Weld VCC capacitor on the right side of the transformer, next to the input fuse.

Rectifier bridge, GaN integrated IC and optical coupler are arranged on the back of PCBA module.

     GaN integrated IC CX75GD025E integrates 650V/250mΩ conductive GaN HEMT,logic controller and a GaN driver, adopts a flyback mode, adopts an ESOP-10W package, and has an output power of 45W and a maximum working frequency of 200KHz.

     The synchronous rectifier chip adopts CX7539F, which is a high-performance synchronous rectifier control circuit on the secondary side of switching power supply. In the application of low-voltage and high-current switching power supply, it can easily meet the energy efficiency of class 6, and is an ideal solution for ultra-low conduction voltage drop rectifier devices. The chip can support switching frequency applications as high as 150kHz, as well as switching power mode applications such as CCM/QR/DCM. The loss caused by its extremely low turn-on voltage drop is far less than the turn-on loss of Schottky diode, which greatly improves the conversion efficiency of the system and greatly reduces the temperature of the rectifier device.

     This 40W dual-C-port gallium nitride fast charging scheme adopts a dual-C-port design, which can charge two devices at the same time, greatly improving the charging efficiency. The output of two USB-C ports are both in the fast charging state on a fast charging device, and both interfaces can be plugged blindly and do not interfere with each other, which solves the problem that the charging performance of multi-port chargers decreases at the same time, realizes the rapid recovery of power of two devices at one time, and saves users with two or more devices.

     CXW technology have a variety of GaN charger, covering 20W, 30W, 45W, 65W, 100W and other multi-power segments. One GaN IC can easily replace the functions of two or three chips on the primary side. Through a highly integrated sealed chip, a streamlined and efficient GaN charger is designed, which can effectively simplify the design and production process of the charger, help the Iphone16 series to be sold smoothly, and help industry customers quickly seize the market.