BQ24050 1A, Single-Input, Single Cell Li-Ion Battery Charger with Automatic AC/USB Detection. | Linear | TI.com

BQ24050 (ACTIVE) 1A, Single-Input, Single Cell Li-Ion Battery Charger with Automatic AC/USB Detection. | Linear

 

Description

The bq2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq2405x has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.

Features

  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Pin Selectable USB 100-mA and 500-mA
      Maximum Input Current Limit
    • Programmable Termination and Precharge
      Threshold
  • Protection
    • 30-V Input Rating; With 6.6-V Input
      Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C
      Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISETShort
      Detection
    • Operation Over JEITA Range Through Battery
      NTC – \xBD Fast-Charge-Current at Cold,
      4.06 V at Hot
    • Fixed 10-Hour Safety Timer
  • System
    • Auto Input Source Detection (D+, D– Pins)
      No Device Transceiver Required USB Friendly
    • Automatic Termination and Timer Disable Mode
      (TTDM) for Absent Battery Pack With Thermistor
    • Status Indication – Charging/Done
    • Available in Small 2-mm × 2-mm or
      2-mm × 3-mm Package
  • APPLICATIONS
    • Smart Phones
    • PDAs
    • MP3 Players
    • Low-Power Handheld Devices

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Parametrics

Compare all products in Battery charger ICs Email Download to Excel
Part number Order Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ24050 Order now 1     Charger     Li-Ion/Li-Polymer     1     3.5     6.45     30     4.2     4.2     JEITA BAT Temp Monitoring (Thermistor Pin)
OVP
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO
VINDPM
USB D+/D-/BC1.2    
Standalone (RC-Settable)     Linear     Catalog       WSON | 10     See datasheet (WSON)    
BQ21040 Order now 1     Charger     Li-Ion/Li-Polymer     0.8     3.5     6.45     30     4.2     4.2     OVP
Temp Monitoring (Thermistor Pin)
UVLO    
Standalone (RC-Settable)     Linear     Catalog     0 to 125     SOT-23 | 6     6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)    
BQ24040 Order now 1     Charger     Li-Ion/Li-Polymer     1     3.5     6.5     30     4.2     4.2     JEITA BAT Temp Monitoring (Thermistor Pin)
OVP
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO
VINDPM    
Standalone (RC-Settable)     Linear     Catalog     0 to 125     WSON | 10     See datasheet (WSON)    
BQ24045 Order now 1     Charger     Li-Ion/Li-Polymer     1     3.5     6.5     30     4.35     4.35     JEITA BAT Temp Monitoring (Thermistor Pin)
OVP
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO
VINDPM    
Standalone (RC-Settable)     Linear     Catalog       WSON | 10     See datasheet (WSON)    
BQ24052 Samples not available 1     Charger     Li-Ion/Li-Polymer     1     3.5     6.45     30     4.2     4.2     JEITA BAT Temp Monitoring (Thermistor Pin)
OVP
Temp Monitoring (Thermistor Pin)
Thermal Regulation
UVLO
VINDPM
USB D+/D-/BC1.2    
Standalone (RC-Settable)     Linear     Catalog       WSON | 10     See datasheet (WSON)