STMicroelectronics’ products chosen for Qi-compliant automotive wireless charging design from Rohm

  • Industry News
  • Feb 05,19
STMicroelectronics’ automotive NFC Reader IC (ST25R3914) and its automotive 8-bit microcontroller (STM8AF) will be used for the automotive wireless charging reference design from Rohm
STMicroelectronics’ products chosen for Qi-compliant automotive wireless charging design from Rohm

Global semiconductor leader STMicroelectronics’ automotive NFC Reader IC (ST25R3914) and its automotive 8-bit microcontroller (STM8AF) have been chosen for the Qi-compliant automotive wireless charging reference design from Rohm. Contactless communication based on NFC is already in extensive use for functions such as mobile payment by smartphone and in recent years, NFC use has been rapidly widening from mobile devices to industrial equipment, IoT devices and even automotive systems.
 
The wireless charging module design from Rohm is based on the BD57121MUF-M, a Qi-standard 15-W wireless charger IC being developed by Rohm, that aims to increase the adoption of wireless charging in the centre console of the vehicle. One benefit of ST’s technology contribution is to enable the sophisticated control that makes possible the detection of contactless smart cards in proximity to the charging system in order to halt the charging immediately. This important and appreciated function prevents the failure of those cards due to the strong magnetic field generated by the Qi transmitter.
 
“Rohm’s adoption of the ST NFC products and 8-bit microcontroller for their Qi-standard automotive wireless-charging reference design shows that ST’s broad product lineup has big potential for creating new and valuable automotive functions. We anticipate many auto manufacturers will see wireless charging as an important added value that will provide ST with another way to contribute to a more comfortable driving experience for consumers,” said Hiroshi Noguchi, Japan Country Manager, STMicroelectronics.
 
ST’s automotive NFC Reader IC, the ST25R3914, is an AEC-Q100 grade 1 qualified NFC analogue front-end device supporting ISO14443A/B, ISO15693, FeliCa and active P2P. Its best-in-class RF performance and its unique Automatic Antenna Tuning function dynamically adapting to challenging metallic environments make it the perfect fit for automotive applications. It comes with a MISRA-C: 2012-compliant RF middleware which helps to shorten the time required for software development.
 
The automotive 8-bit MCU, STM8AF, provides high performance, wide-ranging choice for memory size, and many package options, contributing to more flexible automotive systems. The MCU features true data EEPROM, CAN and LIN bus, and high operating temperature support up to 150°C. In combination with the NFC function, it can also be used as a controller to manage new types of automotive NFC applications, such as Bluetooth/Wi-Fi pairings for smartphones, infotainment using NFC verification and engine start-up.

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