BQ24023DRCRG4

The BQ24023DRCRG4 from Texas Instruments is a highly integrated, flexible Li-Ion linear charge and system power management device designed for space-limited applications. This single monolithic device offers integrated USB-port and AC-adapter supply management with autonomous power-source selection.

Key features include selectable 100mA and 500mA charge rates for USB input, and an external resistor to set charge current for AC adapter input, supporting up to 1A. It is ideal for low-dropout charger designs for single-cell Li-Ion or Li-polymer packs. The device operates within a temperature range of -40°C to 125°C (TJ) and comes in a compact 10-VSON (3x3) package.

The charger operates in three phases: preconditioning, constant current, and constant voltage, with termination based on minimum current. An internal charge timer provides backup safety. The BQ24023DRCRG4 automatically restarts charging if battery voltage falls below a threshold and enters sleep mode when both supplies are removed. It also includes over-temperature fault protection.

This IC is suitable for portable applications such as PDAs, MP3 players, digital cameras, internet appliances, and smartphones. It is supplied in a 10-VFDFN Exposed Pad package and requires surface mount.