NuVolta Semiconductor, as a leading company in the wireless charging industry, has actively participated in the promotion of the Qi2 standard and has been fortunate to be invited to the first batch of certification testing. Currently, the Nu222 module has successfully passed the Qi2 certification and received the certificate with certificate number 14391. The Nu222 module is now ready for shipment to customers in the Apple ecosystem, providing MPP 15W fast charging for the latest Apple iPhone 15 series and old iPhone 12 to 14.
WPC began the Soft-Launch certification testing in November 2023. This phase was primarily open to early participants who actively took part in the MPP Plugfest and made contributions to the standard technology. Products that passed the certification were included in the Qi2 compatibility test resource pool and served as benchmarks for subsequent certifications.
NuVolta pioneered the module subsystem certification approach
Customers can quickly stack new products like building blocks using NuVolta Semi's module subsystem certification approach. Customers incorporating Nu222 module products can opt for subsystem certification, which exempts them from ATL (Authorized Test Lab) and IOP (Interoperability) testing. This approach allows for direct registration, shortening the development cycle, and eliminating certification fees, and NuVolta also provides registration services. The Nu222 module is the only module in the industry that supports subsystem certification for Qi2.
Nu222 Module from NuVolta
The Nu222 module supports multiple power specifications for input, including USB PD 9V2.22A, 5V3A, and DC protocol 9V2.22A. It also supports a maximum 15 W fast charging output. The standby power consumption is less than 300 mW, and the efficiency exceeds 78%. The module supports both BPP (Basic Power Profile) and MPP (Medium Power Profile) charging modes.
The Nu222 module is equipped with various protection measures, including OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OTP (Over Temperature Protection), and OSP (Over Short Protection). It also incorporates multiple foreign object detection technologies to ensure the safety, efficiency, and reliability of the charging process.
Test with iPhone15
The charging head network conducted a test by placing the NuVolta Qi2 MPP wireless charging module and iPhone 15 in a constant temperature chamber at 250C, and connecting them to a power source. The test results are as follows.
After connecting to the power source, the voltage handshake was established at 9 V. The power remained stable at around 19.5 W for the first 9 minutes. Subsequently, the power decreased to approximately 14 W and continued charging until the 32nd minute. Then, the power dropped to around 12 W and continued charging until the 45th minute. Afterward, the power increased to approximately 15 W and continued charging until the 49th minute. Then, the power decreased to around 13 W and continued charging until the 1 hour and 5-minute mark. Subsequently, the power decreased to around 8 W and continued charging until the 1 hour and 32-minute mark. Then, the power gradually decreased and entered trickle charging mode until the phone was fully charged. The entire charging process took approximately 2 hours and 2 minutes.
The graph shows that it takes approximately 44 minutes to charge the iPhone 15 to 50%, around 1 hour and 15 minutes to charge it to 80%, and approximately 2 hours and 2 minutes to charge it to 100% using the NuVolta Qi2 MPP wireless charging module. According to the test conducted by the charging head network, the maximum charging power of the NuVolta Semi Qi2 MPP wireless charging module, Nu222, is around 19.7 W.
The results of the test setup
Selection Table
