New Industry Products

TI Introduces 800mA, 30V Linear Battery Chargers With Automatic USB Detection

October 12, 2009 by Jeff Shepard

Texas Instruments Inc. (TI) introduced two families of 800mA 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 30V, and 6.6V 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 include: a charging accuracy of 1% charge voltage and 10% current accuracy using a single-output channel; USB current limiting and input voltage dynamic power management; complies with JEITA guidelines; 30V input rating and overvoltage protection and includes a 10-hour safety timer; and system flexibility: bq2405x has automatic input source detection of USB port or a dedicated power adapter.

TI’s bq24040, bq24041, bq24050, bq24052 and bq24055 come in two small package options: a 10-pin, 2 x 2mm, or 12-pin, 2 x 3mm SON package. Suggested resale pricing is $1.15 to $1.45 in 1,000-unit quantities. Samples, evaluation modules and application notes on TI’s battery chargers are available.