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Battery charger chip targets wearables

Battery charger chip targets wearables

New Products |
By Rich Pell



The STBC02 IC combines all of the most frequently demanded features for energy management in wearable and portable devices, including linear battery charging, a 150 mA Low Drop-Out voltage regulator, two SPDT (Single-Pole/Double-Throw) load switches, a smart reset/watchdog function, and a Protection Circuit Module that protects the battery from damage under fault conditions.

According to independent market researchers IDC,, the wearable market reached 78 million units in 2015, with an annual year-over-year growth of 172%. The STBC02 reduces the application footprint and simplifies the design, leading to lower cost and faster time-to-market for wearable products across the spectrum of healthcare, fitness, and messaging and socialization applications.

All the STBC02 functions are simply controlled via the SWIRE protocol that requires only one microcontroller I/O pin, while the 10nA shutdown current drawn from the battery during normal operations enables longer battery life.

An integrated Protection Circuit Module allows the device to be used with Li-ion batteries without any other protection chip, while an integrated power path allows the battery to be charged and the overall system to be powered at the same time. The chip includes embedded Smart Reset/Watchdog functions to enhance system reliability by providing full recoverability in case of software failure, and the adjustable Vbatt floating voltage allows the use of different Li-ion chemistries and also offers the possibility to implement customized charging strategies.

The STBC02 is available now in volume at a price of US$1.10 for 1,000 units.

More information is available at www.st.com

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