NXP's NXQ1TXH5 is a controller/driver IC for a 5 V Qi-compliant wireless charger. It offers a fully integrated transmitter solution that includes a 5 V full-bridge power stage to directly drive a Qi transmitter coil, as defined in the 5 V A5, A11, A12 and A16 Qi standards.

The NXQ1TXH5 has dedicated analog ping circuitry to detect available devices, according to the wireless power consortium (WPC) Qi standard, which achieves extremely low standby power consumption. If a Qi-compliant receiver is detected, the NXQ1TXH5 will attempt to communicate with it. If the receiver is recognized, it will safely initiate wireless power transfer from the transmitter to the receiver, while monitoring for any fault conditions like interfering metal objects or overheat conditions. The device is optimized to operate from a USB power supply and can also handle limited supply power conditions by automatic adjustment of the output power, called smart power limiting (SPL).

For the user interface LED outputs are available with several blinking modes as well as a buzzer output. Additional features like static power reduction (SPR) allow multiple NXQ1TXH5 based transmitters to operate from a single USB power supply.

The NXQ1TXH5 is available in a 5 mm x 5 mm, 32-pin HVQFN package with 0.5 mm pitch.

Datasheet, App Notes, and Demo Board User’s Manual

• Very small, low cost design on 2-layer PCB
• Delivers 5 W at Qi wireless charging receiver output (8.5 W transmitter power) with superior thermal performance
• Peak efficiency of 75%

Applications

• Wireless power consortium (WPC) certified/compliant Qi wireless power transmitters