Power

Buck-boost battery charge controllers enable USB Type-C support

26th July 2017
Alice Matthews
Datasheets

A pair of highly flexible, single-chip buck-boost battery charge controllers for one- to four-cell (1S to 4S) designs has been introduced by Texas Instruments (TI). 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 bq25703A and bq25700A feature a new advanced battery algorithm enabling full power output by adding intelligence to battery charging through maximum power point tracking technology. The algorithm, referred to as input current optimisation (ICO), automatically detects the full capacity of input power to optimise current, while maintaining consistent system and charging current to ensure the utilisation of maximum input power.

Key features:

  • Input source flexibility: The device’s USB Power Delivery compatibility offers an input voltage range from 3.5-24V, which designers can use in multiple ports including USB 2.0, USB 3.0 and the newest standard, USB Type-C.
  • Wide USB On-the-Go (OTG) output compatibility: The new charge controllers support input-ready devices from 5-20V and adjustable output for USB OTG with programmable current regulation.
  • Compact configurations: TI’s new 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.
  • Seamless transition between different modes : The devices support 1-4S batteries and an efficient transition between buck and boost operation without any dead zone.

The bq25703A and bq25700A expand TI’s portfolio of battery-charger solutions, offering switch-mode fast chargers and linear chargers for a broad variety of applications and power levels.

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