The new BC3770 meets market demands for fast charging speeds, long battery life, and extended portable use, while also incorporating features that allow OEMs and system designers to prevent device overcharging and overheating. The BC3770 charger and boost regulator circuits switch at 1.5 MHz, improving efficiency and saving space and costs by minimizing the size of external passive components. Additionally, the product's charging parameters and operating modes are fully programmable via an I²C interface operating at up to 400 kHz, enabling the implementation of highly optimized solutions.

“As the number and variety of connected battery-powered devices increase due to IoT, charging has become a more challenging task,” said James Bates, Vice President and General Manager of Freescale’s Analog Sensor Group. “Freescale’s new BC3770 provides the programming capabilities, integration, and efficiency that OEMs need to keep pace with the demand for new IoT applications such as wearable devices, wireless game controllers, and mobile POS terminals.” “Perfect integration with Freescale’s portfolio of power management, MCUs, and application processors provides a complete solution that accelerates and simplifies the production of increasingly complex battery-powered IoT devices,” he said.

Freescale's new battery charger uses a single 20V withstand input, charges batteries with a maximum current of 2.0A, and supports simultaneous charging and application use. To increase the efficiency of system development, you can use the BC3770 Freescale Freedom board equipped with the Kinetis KL25Z microcontroller and including example interface software and GUI.

Additional features

• Dual-path output simultaneously charges the battery and supplies power to the system

• 25-bump 2.27mm x 2.17mm Wafer Level Chip Scale Package (WLCSP)

• 900mA boost mode charging for USB OTG

• Supports single-cell lithium-ion and lithium-polymer batteries

• High-efficiency synchronous switching regulator

• 1.5MHz switching frequency

• Programmable interface for monitoring various charging modes

Software and development support

Freescale enables customers to streamline product development and fully utilize their semiconductorsIt supports highly customized development technology. The evaluation board compatible with the Freescale Freedom development board (FRDM-BC3770EVB) is currently available at a price of $149 (USD).

Supply situation and prices

The BC3770 battery charger is currently being supplied in mass production quantities by Freescale (www.freecale.co.kr) and official distributors worldwide. The recommended resale price for the charger is $1.04 (USD) per 10,000 units. Further details can be found at http://www.freescale.com/Battery.