In the era of the rise of USB PD fast charging, high-power mini fast charging chargers have become the trend of intelligent products. The following mini 1A1C dual port fast charging car charger is compact and exquisite The C port supports multiple mainstream fast charging protocols and has five fixed voltage ranges, including 5/9/12/15/20V, as well as two PPS voltage ranges, 3.0-5.9V/3A and 3.0-11V/3A. The maximum output power of 30W can meet the fast charging needs of most mobile phone products.

• Input: DC 12-24V

• USB-A output: 4.5V/5A, 5V/4.5A, 9V/3A, 12V/2.5A (Max)

• USB-C output: 5V/3A, 9V/3A, 12V/2.5A, 15V/2A, 20V/1.5A (Max)

• Dual port simultaneous output/total output: 5V/5A, 25W

• Use the ChargerLAB Power-Z KT001 tester to test the protocol of the USB-A port for car charging, and it is found that it supports charging protocols such as APPLE 2.4A, QC2.0, QC3.0, FCP, SCP, AFC, etc.

• The USB-C port also supports charging protocols such as APPLE 2.4A, QC2.0, QC3.0, FCP, SCP, AFC, as well as the USB PD fast charging protocol.

The main control chip of the car charger adopts CX8871. CX8871 is a step-down controller that can drive dual output (8A4A+4A) load currents with a constant voltage accuracy of ± 2% (VFB=1.0V). The design allows CX8871 to operate within a wide input voltage range of 4.75V-40V. The external shutdown function is achieved by lowering the RT/EN pin logic level and entering standby mode. External compensation enables the feedback control loop to have good line voltage and load adjustment rates, and the peripheral design is flexible.

The fast charging protocol chip adopts CX2919C, which is used for 1C1A dual port control. CX2919C supports fast charging protocols such as PD2.0/3.0, PPS, QC2.0/3.0, FCP, SCP, AFC, etc. It is very suitable for application on 1C1A dual port charging devices.

CX8871 paired with CX2919AC is used for 1A1C dual port PD fast charging, with a maximum output power of 30W. Only two MOSs and one inductor are needed on the periphery with very few other components to complete a high-performance and cost-effective PD fast charging solution. The PCB design is simplified, which can shorten the product production cycle. The CX8871+CX2919AC+4040 * 2+3419 solution is very suitable for the development of small volume USB PD dual port car chargers.