240W quick charging is coming

The Vice President of RealMe has announced that the RealMe GT Neo5 will be launched soon, and the new machine will bring 240W super fast charging.

The 240W full-level second charging adopts the parallel shunt design of three 100-watt charge pumps. The non-uniform distribution of the three-way charge pump current is mainly to achieve balanced heat dissipation and avoid local overheating of the fuselage. The charging conversion efficiency of this scheme reaches 98.5%. The 240W charging power makes the charging current reach 12A.

Trend

With mobile phone manufacturers or notebook computer manufacturers beginning to announce the support of 240W USB-C power supply, this is a very important innovation. As mobile phone manufacturers begin to research and develop 240W fast charging, more mobile phone manufacturers will follow up in the future. For cable manufacturers, the originally configured USB-C cable also needs to be updated, because the old protocol specification only defines the 3A and 5A cable specifications. Last year, the USB-IF Association issued the latest USBC2.1 specification, upgrading the original maximum 20V/5A power supply under the USB PD protocol to 48V/5A, that is, 100W to 240W. 240W USB-C is still an optional function, not a required function at this stage.

EPR wire and requirements

Now the SPR wire widely used can not bear the power of up to 240W. The manufacturer must use the enhanced EPR wire, and the cost of EPR wire is higher.

USB-IF‘s requirement for 240W new specification is: "All EPR cables shall be clearly identified with EPR cable identification items". A cable needs to support up to 5A and 50V to meet the requirements. To use the new specifications, users need new USB-C chargers and cables, and manufacturers may also need to adjust the design of chargers and cables to meet the requirements.

There are only two types of USB-C to USB-C cables at present, 60W or 240W. There are no other power categories, and 100W cables have been discarded.

The test of 240W cable is very similar to the previous cable. The only update item in Power Delivery CTS is to check that the E-marker of the cable has been set to enable EPR.

In addition, for 240W cable, the customer must confirm by himself that the Vbus capacitor with withstand voltage of more than 50.9V has been adopted and complies with USB-C cable specification version 2.1.

The PD3.1 standard of USB-IF Association has a charging power of 240W, and it has added 28V, 36V and 48V expansion output voltage. The latest standard has obviously far exceeded the current charging level of electronic products.

By HornmicLink_Bob Kuo @231124