NXP Semiconductors’ NXQ1TXL5 is a low-cost drop-in replacement for the NXQ1TXH5, a single-chip low-power transmitter IC for Qi chargers.
The NXQ1TXL5, an integrated controller and driver IC, enables the design of a 5V Qi-compliant low-power wireless charger with few external components. It includes a 5V full-bridge power stage, as defined in the Wireless Power Consortium’s A5, A11, A12 and A16 low-power configurations of the Qi specification.
While both the NXQ1TXL5 and the NXQ1TXH5 may be used in Qi-compliant designs, the NXQ1TXL5 offers fewer configuration options and does not support Foreign Object Detection, while the NXQ1TXH5 provides all the features needed for full Qi certification. This means that the NXQ1TXL5 enables the simple implementation of a low-power Qi-compliant wireless charger for applications which do not require full Qi certification, but which must interoperate with Qi-compliant receivers.
The NXQ1TXL5’s fixed configuration enables a reduction in component count and a simpler board layout when replacing a NXQ1TXH5, since it does not require external configuration resistors.
The NXQ1TXL5 uses dedicated analogue ping circuitry to detect devices, as specified by the Qi standard, and achieves low stand-by power consumption of 10mW. The NXQ1TXL5 also handles communication and control of wireless power transfer from the transmitter to the receiver. It can provide power to two indicator LEDs and offers fixed LED blinking modes.
- Qi-compliant low-power wireless power transmitters
- 1W-3W wireless charging for portable devices
- Wearable devices
- Smart watches
- Remote controls
- Small home appliances
- Transmit power up to 8W
- Operates from 5V supply
- Over-current and over-temperature protection
- Passes EN55022 tests for radiated and conducted emissions
- Robust DSP-based dual-channel ASK communication