5 V reference design
NXP's single chip fully integrated 5 V wireless charging transmitter solution is designed according to the Qi low power A5/A11 specification.
NXP’s 5 V wireless charging transmitter architecture combines our high performance mixed signal technology, in the form of functions like on-chip voltage regulation, on-chip current and voltage measurement, ASK and foreign object detection (FOD) to optimize safe & efficient wireless charging and an integrated full bridge to drive the transmitter coil, controlled by NXP’s low power CoolFlux DSP technology.
The design provides sufficient transmitted output power to enable a 5 W wireless charger receiver output to the battery of the device to be charged, and uses advanced digital ASK signal processing to ensure reliable interoperability. The low power CoolFlux DSP technology will enable an extremely low standby power to minimize power consumption when there is no device placed on the charger. At the same time, it provides a fast device detection and wakeup when charging should start.
The single chip 5 V solution is provided in a package that measures just 5 x 5 mm and requires only very few external components. This enables the smallest possible design for a 5 V Qi low power wireless charging transmitter, with the highest possible efficiency and the lowest possible standby power. Powered by the NXP GreenChip TEA1720 high efficiency SMPS controller in the 5 V supply unit, this Qi A5/A11 wireless charging transmitter becomes an even more optimized solution. And of course, this solution can also use a standard 5 V USB charger with suitable output power.
|75017524||Wireless charging transmitter (1.0)||Leaflet||2014-02-21|