CX8855 is applied to the German Hama 45W dual USB-C fast charging car, and the high-power dual USB-C fast charging solution is disassembled. This German Hama 45W fast charging car supports 25W and 20W output power, which can meet the charging needs of two mobile phones at the same time.

Hama, a German brand with nearly a century of history, is a German accessory distributor specializing in the fields of photography, photography, mobile phones, digital, audiovisual, communication, home furnishings, etc., providing consumers with over 20000 high-quality accessory products. Hama is headquartered in Monheim, Bavaria, Germany.

Specific parameters:

• Input: DC 12-24V 6200mA

• USB-C1 output: 5V3A, 9V2.77A

• PPS：3.3-5.9V3A、3.3-11V2.25A

• USB-C2 output: 5V3A, 9V2.22A, 12V1.67A

After testing, under 14V DC input, the USB-C1 port supports FCP, AFC, QC3+/4+, PD3.0, PPS, and Apple 2.4A charging protocols. The USB-C1 port also has two fixed voltage ranges of 5V3A and 9V2.77A, as well as two PPS voltage ranges of 3.3-5.9V3A and 3.3-11V2.25A.

The USB-C2 port supports FCP, SCP, AFC, QC3.0, SFCP, PD3.0, and Apple 2.4A charging protocols, and has three fixed voltage ranges of 5V3A, 9V2.22A, and 12V1.67A.

Under 24V DC input, the USB-C1 port supports FCP, AFC, QC3+/4+, PD3.0, PPS, and Apple 2.4A charging protocols. And it also has two fixed voltage ranges of 5V3A and 9V2.77A, as well as two PPS voltage ranges of 3.3-5.9V3A and 3.3-11V2.25A.

The USB-C2 port supports FCP, SCP, AFC, QC3.0, SFCP, PD3.0, and Apple 2.4A charging protocols, and has three fixed voltage ranges of 5V3A, 9V2.22A, and 12V1.67A.

After disassembly, it can be seen that the USB-C port uses a synchronous step-down converter with a built-in DC-DC protocol. The other step-down converter next to it uses CX8855, which is a step-down DC-DC converter with an input withstand voltage of up to 32V and can achieve precise constant voltage and current. It is equipped with a 30m Ω High side PMOS and a 20m Ω Low side NMOS, and can support a continuous output current of 3.4A with adjustable output voltage and a maximum of 100% duty cycle.

Paired with the USB PD protocol, it forms an efficient and high-power dual USB-C interface fast charging solution. The Hama 45W car charger has two USB-C interfaces, with output power of 20 and 25W respectively, meeting the fast charging needs of mainstream mobile phones. The car charger supports PD and PPS fast charging outputs, and has good fast charging compatibility.