Produktdetails

Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), Input OVP, Power Path Vin (min) (V) 4.2 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), Input OVP, Power Path Vin (min) (V) 4.2 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YFF) 49 9 mm² 3 x 3 VQFN (RGE) 24 16 mm² 4 x 4
  • High-Efficiency Switch Mode Charger with Separate Power Path Control
    • Make a GSM Call with a Deeply Discharged Battery or No Battery
    • Instantly Start up the System from a Deeply Discharged Battery or No Battery
  • Highly Integrated Battery N-Channel MOSFET Controller for Power Path Management
    • 20 V input rating, with 6.5 V Overvoltage Protection (OVP)
    • Integrated FETs for Up to 1.5 A Charge Rate
  • Safe and Accurate Battery Management Functions
    • 0.5% Battery Regulation Accuracy
    • 10% Charge Current Accuracy
  • Charge Parameters Programmed Using I2C Interface
    • Charge Voltage, Current, Termination Threshold, Input Current Limit,
      VINDPM Threshold
  • Voltage-based, NTC Monitoring Input
    • JEITA Compatible
  • Thermal Regulation Protection for Output Current Control
  • BAT Short-Circuit Protection
  • Soft-Start Feature to Reduce Inrush Current
  • Thermal Shutdown and Protection
  • Available in Small 2.8 mm x 2.8 mm 49-ball WCSP or
    4 mm × 4 mm QFN-24 Packages
  • High-Efficiency Switch Mode Charger with Separate Power Path Control
    • Make a GSM Call with a Deeply Discharged Battery or No Battery
    • Instantly Start up the System from a Deeply Discharged Battery or No Battery
  • Highly Integrated Battery N-Channel MOSFET Controller for Power Path Management
    • 20 V input rating, with 6.5 V Overvoltage Protection (OVP)
    • Integrated FETs for Up to 1.5 A Charge Rate
  • Safe and Accurate Battery Management Functions
    • 0.5% Battery Regulation Accuracy
    • 10% Charge Current Accuracy
  • Charge Parameters Programmed Using I2C Interface
    • Charge Voltage, Current, Termination Threshold, Input Current Limit,
      VINDPM Threshold
  • Voltage-based, NTC Monitoring Input
    • JEITA Compatible
  • Thermal Regulation Protection for Output Current Control
  • BAT Short-Circuit Protection
  • Soft-Start Feature to Reduce Inrush Current
  • Thermal Shutdown and Protection
  • Available in Small 2.8 mm x 2.8 mm 49-ball WCSP or
    4 mm × 4 mm QFN-24 Packages

The bq24270 and bq24271 are highly integrated single cell Li-Ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The single cell charger has several input current limits which allow operation from either a USB port or higher power input supply (i.e. AC adapter or wireless charging input) for a versatile solution.

The power path management feature allows the bq24270 and bq24271 to power the system from a high efficiency DC to DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This allows for proper charge termination and timer operation. The system voltage is regulated to the battery voltage but will not drop below 3.5 V. This minimum system voltage support enables the system to run with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter. The charge parameters are programmable using the I2C interface

The battery is charged in three phases: precharge, fast charge constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging The TS function for bq24270 and bq24271 are JEITA compatible.

The bq24270 and bq24271 are highly integrated single cell Li-Ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The single cell charger has several input current limits which allow operation from either a USB port or higher power input supply (i.e. AC adapter or wireless charging input) for a versatile solution.

The power path management feature allows the bq24270 and bq24271 to power the system from a high efficiency DC to DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This allows for proper charge termination and timer operation. The system voltage is regulated to the battery voltage but will not drop below 3.5 V. This minimum system voltage support enables the system to run with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter. The charge parameters are programmable using the I2C interface

The battery is charged in three phases: precharge, fast charge constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging The TS function for bq24270 and bq24271 are JEITA compatible.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet 1.5A, Single-Input, Single Cell Switchmode Li-Ion Battery Charger datasheet 31 Mai 2012

Design und Entwicklung

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Support-Software

SLUC345 bq2427xEVM_SW_V0001.zip

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Batterielader-ICs
BQ24270 I2C-geregeltes Abwärtsladegerät mit 1 Zelle, 1,5 A, Power Path Management und D+/D-Erkennung BQ24271 I2C-geregeltes Abwärtsladegerät mit 1 Zelle, 1,5 A und Power Path Management BQ24272 Switchmode-BATTERIELADER für 1 Li-Ion-Zelle, 2,5 A, ein Eingang, mit Power-Path-Management
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
DSBGA (YFF) 49 Ultra Librarian
VQFN (RGE) 24 Ultra Librarian

Bestellen & Qualität

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  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
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