Standalone Synchronous Switch-mode Li-Ion Charger with 2A FET - BQ24103A

BQ24103A (ACTIVE)

Standalone Synchronous Switch-mode Li-Ion Charger with 2A FET

Description

The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced QFN package. The system-controlled version provides additional inputs for full charge management under system control.

The bqSWITCHER charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user- selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER automatically enters sleep mode when VCC supply is removed.

Features

  • Ideal For Highly Efficient Charger Designs For Single-,
    Two- or Three-Cell Li-Ion and Li-Polymer Battery Packs
  • bq24105 Also for LiFePO4 Battery
    (see Using bq24105 to Charge the LiFePO4 Battery)
  • Integrated Synchronous Fixed-Frequency PWM Controller
    Operating at 1.1 MHz With 0% to 100% Duty Cycle
  • Integrated Power FETs For Up To 2-A Charge Rate
  • High-Accuracy Voltage and Current Regulation
  • Available In Both Stand-Alone (Built-In Charge Management and Control)
    and System-Controlled (Under System Command) Versions
  • Status Outputs For LED or Host Processor Interface Indicates
    Charge-In-Progress, Charge Completion, Fault, and AC-Adapter
    Present Conditions
  • 20-V Maximum Voltage Rating on IN and OUT Pins
  • High-Side Battery Current Sensing
  • Battery Temperature Monitoring
  • Automatic Sleep Mode for Low Power Consumption
  • System-Controlled Version Can Be Used In NiMH and NiCd Applications
  • Reverse Leakage Protection Prevents Battery Drainage
  • Thermal Shutdown and Protection
  • Built-In Battery Detection
  • Available in 20-Pin, 3,5 mm × 4,5 mm QFN Package
  • APPLICATIONS
    • Handheld Products
    • Portable Media Players
    • Industrial and Medical Equipment
    • Portable Equipment

bqSWITCHER, PowerPAD are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.

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Parametrics Compare all products in Battery Chargers and Front-End Solutions

 
Function
Cell Chemistry
# Series Cells
Vin (Max) (V)
Battery Charge Voltage (V)
Charge Current (Max) (A)
Charging Control Topology
Control Interface
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ24103A BQ24100 BQ24103 BQ24104 BQ24105 BQ24108 BQ24113 BQ24113A BQ24115
Charger     Charger     Charger     Charger     Charger     Charger     Charger     Charger     Charger    
Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer    
  Single Cell       2-4 Cells
Single Cell    
2-4 Cells
Single Cell    
Single Cell     2-4 Cells
Single Cell    
2-4 Cells
Single Cell    
2-4 Cells
Single Cell    
16     16     16     16     16     16     16     16     16    
4.2     4.2     4.2     4.2     Adjustable     4.2     4.2     4.2     Adjustable    
2     2     2     2     2     2     2     2     2    
Switchmode Buck     Switchmode Buck       Switchmode Buck     Switchmode Buck     Switchmode Buck     Switchmode Buck     Switchmode Buck     Switchmode Buck    
Standalone     Standalone       Standalone     Standalone       Standalone     Standalone     Standalone    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
20VQFN     20VQFN     20VQFN     20VQFN     20VQFN     20VQFN     20VQFN     20VQFN     20VQFN    
2.00 | 1ku     2.00 | 1ku     2.00 | 1ku     2.00 | 1ku     3.00 | 1ku     2.00 | 1ku     2.00 | 1ku     2.00 | 1ku     3.50 | 1ku    

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