BQ24300 Charger front end protection IC with 30V max Vin and 5.5V LDO output | TI.com

BQ24300 (ACTIVE) Charger front end protection IC with 30V max Vin and 5.5V LDO output

 

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.

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

Parametrics

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Part number Order Function Number of series cells (Min) Number of series cells (Max) Communication interface Features Typical operating current (Typ) (uA) Rating Vin (Max) (V) Package Group Approx. price (US$)
BQ24300 Order now Charger Front-End Protection     1     1     No Communication     Over-voltage (OV)     340     Catalog     30     WSON | 8     0.30 | 1ku    
BQ24305 Samples not available Charger Front-End Protection     1     1     No Communication     Over-voltage (OV)     410     Catalog     30     WSON | 8     0.30 | 1ku