The bq24300 and bq24304 are highly integrated circuits designed to provide protection to Li-ion batteries from failures of the charging circuit. The IC continuously monitors the input voltage, the input current, and the battery voltage. The device operates like a linear regulator: for voltages up to the Input Overvoltage threshold, the output is held at 5.5V (bq24300), 5.0V (bq24305) or 4.5V (bq24304). In case of an input overvoltage condition, if the overvoltage condition persists for more than a few microseconds, the IC removes power from the charging circuit by turning off an internal switch. In the case of an overcurrent condition, it limits the current to a safe value for a blanking duration before turning the switch off. Additionally, the IC also monitors its own die temperature and switches off if it becomes too hot.
The IC also offers optional protection against reverse voltage at the input with an external P-channel MOSFET.
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection IC datasheet (Rev. C) | 04 Dec 2009 |
| User guide | bq2430x/1x DSG EVM (HPA245) for Li+ Charger Front End Protection IC (Rev. B) | 04 Nov 2016 | |
| Analog design journal | Battery-charger front-end IC improves charging-system safety | 16 May 2008 | |
| Application note | How to Meet 24V Hot Plug-In Test for Charge Front-End bq243xx | 02 Jan 2008 | |
| Application note | High Voltage Pulse Transient Safety Design fro bq243xx | 04 Dec 2007 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | Download |
|---|---|---|
| WSON (DSG) | 8 | View options |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.
