STWLC98 Qi-Compliant Wireless Power Receiver STMicroelectronics STWLC98 Qi-Compliant Inductive Wireless Power Receiver is ideal for applications supplying up to 70W output power. The chip is developed to support Qi specifications 1.2.4 and 1.3 for inductive communication protocol with Extended Power Profile (EPP) and proprietary ST Super Charge (STSC) protocol for fast charging.