Charger front end protection IC with 30V max Vin and 5.5V LDO output
Product details
Parameters
Package | Pins | Size
Features
- Provides Protection for Three Variables:
- Input Overvoltage
- Input Overcurrent with Current Limiting
- Battery Overvoltage
- 30V Maximum Input Voltage
- Optional Input Reverse Polarity Protection
- High Immunity Against False Triggering Due to Voltage Spikes
- Robust Against False Triggering Due to Current Transients
- Thermal Shutdown
- Enable Function
- Small 2 mm × 2 mm 8-Pin SON Package
- LDO Mode Voltage Regulation Options:
- 5.5V on bq24300
- 4.5V on bq24304
- 5.0V on bq24305
- APPLICATIONS
- Bluetooth Headsets
- Low-Power Handheld Devices
Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection IC datasheet (Rev. C) | Dec. 04, 2009 |
User guide | bq2430x/1x DSG EVM (HPA245) for Li+ Charger Front End Protection IC (Rev. B) | Nov. 04, 2016 | |
Application note | Battery-charger front-end IC improves charging-system safety | May 16, 2008 | |
Application note | How to Meet 24V Hot Plug-In Test for Charge Front-End bq243xx | Jan. 02, 2008 | |
Application note | High Voltage Pulse Transient Safety Design fro bq243xx | Dec. 04, 2007 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Reference designs
Design files
-
download TIDA-00034 BOM.pdf (54KB) -
download TIDA-00034 PCB.pdf (115KB)
Design files
-
download PMP4651 BOM.pdf (29KB)
Design files
-
download PMP2562 BOM.pdf (29KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WSON (DSG) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
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- Qualification summary
- Ongoing reliability monitoring
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