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