BQ24703

The BQ24703 from Texas Instruments is a highly integrated battery charge controller and system power selector. It is specifically tailored for notebook and sub-notebook PC applications, offering a robust solution for managing battery charging.

This device supports multi-chemistry batteries, including Li-Ion and Li-Polymer, and can handle 2, 3, or 4 series cells. It features a maximum charge current of 10A and operates within an input voltage range of 7V to 28V, with an absolute maximum rating of 30V. The charger utilizes a switch-mode buck control topology and provides precise battery charge voltage control, with a minimum of 8.4V and a maximum of 16.8V.

Key features include dynamic power management (DPM) to minimize battery charge time by maximizing the use of available wall-adapter power. It also supports battery conditioning, smart battery learn cycles, and zero-volt operation. The control interface is standalone and RC-settable. The BQ24703 operates across a wide temperature range of -40°C to 125°C.

Available in a 24-pin TSSOP package and a 28-pin VQFN package, the BQ24703 is designed for efficiency and reliability in power management systems. Its integrated 300-kHz PWM controller ensures high-efficiency buck regulation, while features like depleted battery detection and a low 20µA sleep mode current contribute to overall system performance and battery longevity.