Low-cost one-chip 5 V Qi compliant transmitter
Rev. 1 — 8 April 2016
Product short data sheet
1. General description
The NXQ1TXL5 is a controller and driver IC for a low-cost 5 V Qi-compliant low-power
wireless charger. It offers a fully integrated solution that includes a 5 V full-bridge power
stage, as defined in Wireless Power Consortium (WPC) 5 V Qi standards A5, A11, A12
The NXQ1TXL5 uses a dedicated analog ping circuitry to detect devices. With this analog
ping circuitry, an extremely low standby (wait state) power consumption is achieved.
When a Qi-compliant receiver is placed, the NXQ1TXL5 starts to communicate with it.
After the receiver is recognized, it safely initiates wireless power transfer from the
transmitter to the receiver. The device is optimized to operate from a 5 V USB power
supply and uses Smart Power Limiting (SPL) to adjust the output power automatically to
compensate for power-limited supplies. This low-cost version of the fully integrated NXP
Qi-compliant wireless power transmitted does not support Foreign Object Detection
To indicate the charging status or standby status, the NXQ1TXL5 has two LED outputs for
the user interface.
The NXQ1TXL5 is available in a 5 mm 5 mm, 32-pin HVQFN package.
2. Features and benefits
Single-chip WPC Qi-compliant device for A5/A11/A12/A16 5 V single-coil low-power
Operates from 5 V supply
Integrated high efficiency full-bridge power stage with low EMI radiation meeting
EN55022 radiated and conducted emission limits
Very few external components required, minimizing cost and board space
Extremely low-power receiver detection circuitry by integrating an analog ping circuit;
standby (wait state) power 10 mW (typical)
Power stage protected against overcurrents and overtemperature
Dual-channel ASK demodulation
Demodulates communication packets from Qi-compliant receivers
PID regulation for power drive and control
Internal 1.8 V digital supply generation
Two LED outputs