TI introduces industry's first 800-mA, 30-V linear battery chargers
with automatic USB detection
Tiny single-input, single-cell Li-Ion chargers simplify charging in portable designs

Texas Instruments Incorporated (TI) today introduced two families of 800-mA USB battery chargers with automatic USB detection for single-cell, lithium-ion (Li-Ion) battery-powered electronics. The bq2404x and bq2405x battery charger integrated circuits have a high input-voltage range of up to 30 V, and 6.6-V overvoltage protection to support handheld devices, from entry-level feature phones to smartphones, and other low-power handheld devices, that may use low-cost adapters.

The bq2405x's automatic USB detection feature can intelligently detect if a power source is a dedicated power adapter or USB port. This allows a system to start immediate fast charging if a USB transceiver is unavailable due to a discharged battery.

Key features of the bq2404x and bq2405x battery chargers:
● Charging accuracy: one percent charge voltage and 10 percent current accuracy using single-output channel.
● USB compliance: USB current limiting and input voltage dynamic power management.
● System safety: complies with JEITA guidelines; 30-V input rating and overvoltage protection and includes a
　10-hour safety timer.
● System flexibility: bq2405x has automatic input source detection of USB port or a dedicated power adapter.

Availability and pricing
TI's bq24040, bq24041, bq24050, bq24052 and bq24055 are available in volume now from TI and its authorized distributors. The devices come in two small package options: a 10-pin, 2 mm x 2 mm, or 12-pin, 2 mm x 3 mm SON package.
New battery charger selection tool helps speed selection process
TI provides a broad range of battery charger ICs that support single-cell and multi-cell battery packs used in handheld, portable medical and portable industrial equipment. Designers can select recommended products using TI's new Battery charger selector tool, where one can choose criteria based on battery chemistry, number of cells, topology needed and battery voltage levels.