Date: 15/04/2009

2mm x 3mm battery charger IC supporting both USB and AC adapter

Texas Instruments has released to market a new small size battery charger measuring 2mmx3mm for charging 1.1 A Lithium Ion batteries. This device has built-in 50-mA LDO to power mobile phones and other portable gadgets directly from external supply. The new bq25040 offers a voltage regulation of within one-percent accuracy from a USB port or AC adapter.

The bq25040 also saves manufacturing time and cost by eliminating the need for battery setup during production test phase. The charger's single-input interface selects the appropriate charge current and places the device into production test mode.

Key features and benefits:
1. 30-V input with overvoltage protection enables safe charging with unregulated or aftermarket adapters
2. Up to 1.1-A charge rate
3. Integrated 50-mA LDO supplies power to external circuits, such as a USB transceiver
4. Production test mode regulates 4.2-V output without battery connection, and supplies up to 2.3 A
5. Selectable 100-mA or 500-mA USB current limit complies with USB standards
6. Input voltage dynamic power management provides protection against poor USB sources