Not long ago, Zhirong released its first wireless charging SoC chip SW51 and obtained WPC wireless power consortium Qi certification, QI-ID: 9269. Recently, based on the wireless charging chip and combined with its own product development experience in the field of mobile power supply, Zhirong introduced two reference designs of wireless charging mobile power supply, in which the mobile power supply is divided into two kinds of maximum power: 22.5W and 18W, and the maximum output power of the wireless charging part is 15 W.
two reference designs of wireless charging mobile power supply introduced by Zhirong are developed by using SW628+SW51 and SW621+SW51 respectively. Both schemes adopt minimalist circuit design, and only two chips are used to realize bidirectional fast charging mobile power supply function and wireless charging function.
1. Intelligent Rong's 22.5W super fast charging +15W wireless fast charging mobile power supply scheme
This scheme is based on the design and development of the latest super fast charging mobile power supply chip SW628 and wireless charging chip SW51 of Intelligent Rong. The mobile power supply part continues the excellent performance of SW628, and one chip solves many complicated functions such as step-up and step-down control, protocol identification, five charging interface control, LED power display and so on. Its biggest feature is that. The wireless charging part adopts Zhirong SW51 main control chip, and the peripheral circuit is extremely simplified.
Zhirong SW628 is a highly integrated multi-protocol bidirectional fast charging mobile power supply special all-in-one chip, which supports fast charging at any port of A+A+B+C+L port. It integrates 5A high-efficiency switch charging, 22.5W high-efficiency synchronous boost output, and supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP and other fast charging protocols, power metering, digital tube /LED light display and corresponding control and management logic. Only a few peripheral devices are needed to form a complete high-performance bidirectional fast charging mobile power supply solution.
specifications of zhirong SW628.
Zhirong SW51 is a wireless fast charging and transmitting chip that supports the maximum power of 15W. It conforms to WPC1.2.4 standard, supports 5W BPP and 15W EPP, and integrates high-voltage buck converter, 2 and LDO, 3 sets of NMOS drivers, ASK decoding circuit and FSK modulation circuit, and supports output protocols such as SCP and FCP. Integrated with 32-bit processor, it can be flexibly configured according to users' needs, and with a small number of peripheral devices, a complete high-performance wireless charging and transmitting terminal solution can be formed. It is suitable for the design and development of wireless chargers, wireless charging mobile power supplies, wireless charging speakers and other products.
specifications of zhirong SW51.
overview of the back of PCB.
the mobile power supply part of the reference design is equipped with two USB-A fast charging and outputting interfaces, a USB-C bidirectional charging interface, a Lightning input interface and a MicroUSB input interface.
in order to facilitate customer testing, the scheme also has a USB-C interface on the side, which is mainly used for the separate power supply of the wireless charging module, so that customers can test the wireless charging module independently. It is worth mentioning that the wireless charging module can support the maximum output of 15W whether it is powered by the battery of mobile power supply or independently through USB-C interface.
second, smart 18W fast charging +15W wireless fast charging mobile power supply scheme
smart 18W fast charging +15W wireless fast charging mobile power supply scheme uses smart SW621 main control chip, and the wireless charging part is still matched with SW51 chip. The PCB design is as simple as ever, except for two main control chips, there are few other components.
the main control SW621 of the mobile power supply module is a highly integrated multi-protocol bidirectional fast charging mobile power supply special all-in-one chip, which supports any port fast charging of A+A+B+C ports. It integrates 5A high-efficiency switch charging, 18W high-efficiency synchronous boost output, PPS, PD, QC, AFC, FCP, PE, SFCP and other fast charging protocols, electricity metering, digital tube /LED light display and corresponding control and management logic. Only a few peripheral devices are needed to form a complete high-performance bidirectional fast charging mobile power supply solution.
detailed specifications of zhirong SW621.
wireless charging main control chip SW51.
overview of the back of PCB.
the mobile power module in this scheme controls two USB-A interface fast charging outputs, one USB-C interface bidirectional fast charging and one MicroUSB interface fast charging input functions through SW621.
there is also an additional USB-C interface on the side of the PCB board, which is used for the wireless charging module to supply power separately, which is convenient for customers to debug.
summary of charging headnet
in the field of single-chip fast charging mobile power supply, Zhirong has always occupied a large market share, and the minimalist circuit design brought by single chip has saved a lot of costs for mobile power supply manufacturers. The main control chip SW51 of Zhirong wireless charging also adopts a highly integrated design, which supports 15W output at most, is compatible with 1W, 7.5W and 5W modes, and has passed the Qi certification, thus ensuring product compatibility. Only SW621 or SW628 needs to turn on the wireless charging mode of mobile power supply, and the design of wireless charging treasure can be realized without additional control circuit.
when the minimalist mobile power supply chip is combined with the minimalist wireless charging chip, a more concise wireless charging mobile power supply scheme is born, which is convenient for customers to develop high-performance and cost-effective wireless fast charging mobile power supply with the least peripheral devices. At the same time, thanks to the fact that the two main control chips are both from Zhirong, the development and debugging process of the overall scheme has become simpler, which can speed up the product listing.