BQ24140YFFR

The Texas Instruments BQ24140YFFR is an active battery charger IC designed for single-cell Lithium Ion and Lithium Polymer battery packs. This device features a dual-input switchmode design, allowing it to charge from multiple sources efficiently. It supports USB-OTG (On-The-Go) functionality, enabling the device to provide power back to a USB bus.

Key electrical specifications include a maximum charge current of 1.5A, an input voltage range of 4V to 9V (with an absolute maximum of 20V), and a battery charge voltage range of 3.5V to 4.44V. The control interface is I2C, allowing for programmable charge parameters such as input current, fast-charge/termination current, and charge voltage. It operates within a temperature range of -40°C to 85°C.

The BQ24140YFFR offers high-accuracy voltage and current regulation, with input current regulation accuracy of ±5% and charge voltage regulation accuracy of ±0.5% at 25°C. It includes robust protection features such as input over-voltage protection (OVP), over-temperature protection, and bad adapter detection. The charger also incorporates BAT temperature thermistor monitoring for hot/cold profile charging.

Packaged in a 30-pin DSBGA (30-UFBGA), this surface-mount component is suitable for compact designs. Its integrated power FETs and synchronous fixed-frequency PWM controller operating at 3 MHz contribute to its high efficiency, making it a suitable choice for portable electronics requiring reliable battery charging and USB-OTG support.