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Single-chip buck-boost controller for USB Type-C uses new algorithm

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By Nick Flaherty

The bq25703A and bq25700A synchronous charge controllers support efficient charging through USB Type-C and other USB ports in end equipment ranging from notebooks and tablets to power banks, drones and smart home applications. 

Supporting both I2C and SMBus interfaces, the controllers use a new battery algorithm enabling full power output by adding intelligence to battery charging through maximum power point tracking technology. The input current optimization (ICO) algorithm automatically detects the full capacity of input power to optimize current, while maintaining consistent system and charging current to safely maximise input power.

The USB Power Delivery compatibility offers an input voltage range from 3.5 V to 24 V, which designers can use in multiple ports including USB 2.0, USB 3.0 and the newest standard, USB Type-C, and supports input-ready devices from 5 V to 20 V and adjustable output for USB OTG with programmable current regulation.

The battery-charging algorithm and intelligent detection features enable the battery charge controllers to support wide input and output voltage ranges and more compact adaptor designs, supporting 1S to 4S batteries and an efficient transition between buck and boost operation without any dead zone.

Designers can use the bq25700A evaluation module (EVM) to easily evaluate device features and performance and speed time to market. The bq25703A EVM and the bq25700A EVM  are available for US$149.00 and designers can use the WEBENCH Battery Charger Designer to calculate the efficiency of the battery charge controller.

The bq25703A and bq25700A charge controllers are offered in a 4-mm-by-4-mm, 32-pin quad flat no-lead (QFN) package and priced at US$2.20 in 1,000-unit quantities.
www.ti.com
 


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