Description
The STEVAL-ISB038V1 is a wireless battery charger reference design evaluation kit designed for ultra-compact battery operated devices, such as wearable gear, smartwatches, Internet of Things sensors and healthcare devices. The design is optimized for 1-watt wireless power transfer with a half-bridge topology on the transmitter side and with tiny 11 mm and 20 mm coils on the receiver and transmitter sides, respectively. For power transfers up to 3 watts, the design can be modified by using larger coils and a full-bridge configuration on the transmitter. The STWBC-WA transmitter can support a costeffective half-bridge topology (full-bridge optional) and a powerful software API lets you modify the behavior of LED and general purpose IOs as well as connecting external peripherals or devices like sensors to the design via the on-chip I²C and UART ports. The STWLC04 is designed for 1-watt power transfer based on the Qi protocol, with digital control and precise analog control loops ensuring stable operation. The I²C interface allows a high degree of customization and settings can be stored in the embedded non-volatile memory.

Features
■ Wearable KIT characteristics: − 11 mm coil on Receiver − 20 mm coil on Transmitter − 1 Watt delivered on Receiver side − USB 5 V input − Foreign Object Detection (FOD) optional − Graphical interface for monitoring behavior − Total reference design − RoHS compliant
■ STWBC-WA Wireless power transmitter: − Cost effective Half Bridge topology with integrated drivers − Optional Full Bridge configuration for 3 W applications − Active presence detector − 2-layer PCB to facilitate design − Turnkey solution or customizable via APIs − Parametric customization via Graphical interface
■ STWLC04 wireless power receiver: − Output voltage: 5 V regulated voltage − Integrated high efficiency synchronous rectifier − Li-Ion/Li-Pol charger functionality − 4-layer PCB to facilitate design