DJI Mavic 3 dedicated power supply voltage reduction solution, 65W gallium nitride fast charging uses CX8855 to achieve USB-A port output voltage reduction function. The original factory provides CX8855 in stock, CX8855 solution development, CX8855 sample application and technical support!

In November 2021, DJI launched the DJI Mavic 3 series drone, and the official also equipped the Mavic 3 series with a 65W gallium nitride fast charging charger as standard, greatly improving portability. This marks the official entry of drone giant DJI into the gallium nitride fast charging market. DJI Mavic 3 65W This gallium nitride fast charging USB-A charging interface adopts CX8855, which easily realizes the USB-A output voltage reduction function.

The DJI Mavic 3 original charger comes with a built-in gallium nitride power device and comes with a USB-C output cable. It is specially designed to support 5A current transmission and a maximum output power of 65W; Another USB-A interface supports 5V2A output and can be used to power electronic products such as smartphones.

Share the internal disassembly of DJI 65W 1A1C gallium nitride fast charging charger and take a look at which popular solutions have been adopted together.

Input support for 100-240V~50/60Hz 2A;

The USB-C port outputs 5V5A, 9V5A, 12V5A, 15V4.3A, 20V3.25A, and 5-20V 3.25A;

USB-A port supports 5V2A;

The maximum power output of dual ports simultaneously is 65W. The output specifications of the C port are different from the common 65W fast charging, supporting a maximum 5A current, mainly to meet the charging needs of the DJ Mavic 3 series.

The manufacturer of this charger is Huizhou BYD Electronics Co., Ltd., which has passed CCC certification. The chargers produced by Huizhou BYD include Xiaomi 10 Pro original 65W fast charging charger, Huawei 18W fast charging charger, etc.

In terms of performance, using ChargerLAB POWER-Z KT002, it was found that the USB-C cable included with this charger supports Samsung 5V2A, DCP, QC4, and PD3.0 PPS fast charging protocols.

The PDO message display supports five sets of fixed voltages: 5V5A, 9V5A, 12V5A, 15V4.3A, 20V3.25A, and PPS voltage of 5-20V 3.25A. The USB-A interface output supports Samsung 5V2A and DCP.

Through disassembly, it can be seen that the PWM main control chip adopts NCP1342

The synchronous rectification chip adopts JW7726B from JW7726B

USB PD fast charging protocol chip adopts Liqi Technology screen printing 8K=8J

USB-A port buck chip adopts Chengxin Micro CX8855

CX8855 is a step-down DC-DC converter with an input withstand voltage of up to 32V and the ability to achieve precise constant voltage and current. Built in 30m Ω High side PMOS and 20m Ω Low side NMOS, it can support 3.4A continuous output current and adjustable output voltage, with a maximum support of 100% duty cycle.

CX8855 has high-performance load response and input voltage response capabilities, while precise constant voltage and constant current control loops achieve minimal load adjustment and linear adjustment rates; The chip does not require external compensation and can rely on its built-in stable loop to achieve constant current and voltage control, while also having cable voltage drop compensation function.

The DJI Mavic 3 original 65W gallium nitride fast charging charger is developed using a high-frequency QR power architecture, and is composed of Ansemy main control and Jehuate synchronous rectification to form a power solution. The primary side uses gallium nitride power devices, and the protocol chip comes from Liqi Technology. The A-port output voltage reduction uses the Chengxin micro DC-DC chip. The core components of the entire product are selected from well-known brands in the industry, with stable performance.