Buck-boost battery charge controllers boost USB Type-C and USB PD support
Single-chip, buck-boost battery charge controllers from Texas Instruments are designed for one- to four-cell designs. The bq25703A and bq25700A synchronous charge controllers support efficient charging through universal serial bus (USB) Type-C and other USB ports in notebooks and tablets and equipment such as power banks, drones and smart home applications.
Supporting both inter integrated circuit (I2C) and SMBus interfaces, the bq25703Aand bq25700A feature an 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 use of maximum input power.
The device’s USB Power Delivery compatibility offers an input voltage range from 3.5 to 24V, which designers can use in multiple ports including USB 2.0, USB 3.0 and the newest standard, USB Type-C.
The bq25703Aand bq25700A charge controllers support input-ready devices from 5.0 to 20V and adjustable output for USB on-the-go (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 adapter designs. The devices support one- to four-cell batteries and an efficient transition between buck and boost operation without any dead zone, claims Texas Instruments.
The bq25703A and bq25700A expand Texas Instrument’s portfolio of battery-chargers, offering switch-mode fast chargers and linear chargers for a variety of applications and power levels.
Designers can use the bq25700A evaluation module (EVM) to assses device features and performance, to speed time to market. The bq25703A EVM and the bq25700A EVM are available from Texas Instruments and authorised distributors.
The bq25703A and bq25700A charge controllers are available in a 4.0 x 4.0mm, 32-pin quad flat no-lead (QFN) package.
