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Product details

Parameters

Function Charger Front-End Protection Number of series cells (Min) 1 Number of series cells (Max) 1 Features Over-voltage (OV), Overcurrent protection (OCP) Typical operating current (Typ) (uA) 340 Rating Catalog Vin (Max) (V) 30 open-in-new Find other Battery protectors

Package | Pins | Size

WSON (DSG) 8 4 mm² 2 x 2 open-in-new Find other Battery protectors

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
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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.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection IC datasheet (Rev. C) Dec. 04, 2009
User guides bq2430x/1x DSG EVM (HPA245) for Li+ Charger Front End Protection IC (Rev. B) Nov. 04, 2016
Application notes Battery-charger front-end IC improves charging-system safety May 16, 2008
Application notes How to Meet 24V Hot Plug-In Test for Charge Front-End bq243xx Jan. 02, 2008
Application notes 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

REFERENCE DESIGNS Download
Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection IC Reference Design
TIDA-00034 This reference design, using bq24300 and bq24304, is a highly integrated design that provides 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 design operates like a linear regulator (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Contactless Charger 30mA Single Li-Ion
PMP4651 — Complete wireless charger set for small Li-Ion battery charging system. The nominal output curent is 30mA on a single cell battery, while the intput comes from an USB source.
Design files
REFERENCE DESIGNS Download
Contactless Battery Charger
PMP2562 This reference design is a very small resonant Flyback converter coupled via air (few millimeter distance) from a "receiver". ~ 250mW is wirelessly transferred with an efficiency of 65%.
Design files

CAD/CAE symbols

Package Pins Download
WSON (DSG) 8 View options

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