Qi-compliant 5 V wireless charging controller

Topology: Wireless Power
Input Voltage (min.): 5.00 V
Input Voltage (max.): 5.00 V
Switching Frequency (min.): 100.00 kHz
Switching Frequency (max.): 205.00 kHz

Original publication on 2015-07-02, revision 1.2


The NXQ1TXA5 is a controller/driver IC for a 5 V Qi-compliant wireless charger. It offers a fully integrated solution that uses a 5 V full-bridge power stage to drive a power transmitter, as defined in the 5 V A5, A11 and A12 Qi standards. The NXQ1TXA5 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, it 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 handle also 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 NXQ1TXA5 based transmitters to operate from a single USB power supply. The NXQ1TXA5 is available in a 5 x 5 mm, 32 pin HVQFN package with 0.5 mm pitch.


  • Single chip WPC1.1.2 Qi-compliant device for A5/A11/A16 5 V single coil low power transmitter
  • Integrated full-bridge power stage for optimal coil drive with high efficiency and low EMI radiation
  • Extremely low-power receiver detection circuitry; standby power less than 10 mW
  • Power stage fully protected against over currents and over temperature
  • 2 LED and buzzer outputs
  • Thermally protected
  • Small HVQFN 32-pin package (5 x 5 mm)
  • FOD with automatic switching between V1.1 and V1.0 for legacy receiver support
  • Smart Power Limiting (SPL) function to adapt to power-limited 5 V supplies
  • Static Power Reduction (SPR) function for multiple NXQ1TXA5 on single USB power supply


  Order Code SPEC Product series Compliance Bauform L
RDC max.
Q Samples
760308101103 PDF WE-WPCC Wireless Power Transfer Transmitter Coil works with Qi Tx IC's Ø 30 x 1.9 mm 6.5 50 3 2.3 200 20 35
760308111 PDF WE-WPCC Wireless Power Transfer Transmitter Coil Qi - A11; MP-A11 53 x 53 x 6 mm 6.3 200 13 25 20 80