Texas Instruments has 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 ICshave a high input voltage range of up to 30 V, and 6,6 V over-voltage protection to support 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. Charging accuracy is 1% charge voltage and 10% current accuracy using the single-output channel.
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