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 VQFN 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, 3.50 mm × 4.50 mm VQFN
    Package
  • APPLICATIONS
    • Handheld Products
    • Portable Media Players
    • Industrial and Medical Equipment
    • Portable Equipment

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Parametrics Compare all products in Battery Charger IC

 
# Series Cells
Function
Cell Chemistry
Vin (Max) (V)
Special Features
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
1
2    
1
2    
1
2    
1
2
3    
1
2
3    
1     1
2
3    
1
2
3    
1    
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    
16     16     16     16     16     16     16     16     16    
Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)     Temp Monitoring (Thermistor Pin)    
4.2 (Fixed)     4.2 (Fixed)     4.2 (Fixed)     4.2 (Fixed)     Adjustable     4.2 (Fixed)     4.2 (Fixed)     4.2 (Fixed)     Adjustable    
2     2     2     2     2     2     2     2     2    
Switching Charger     Switching Charger     Switching Charger     Switching Charger     Switching Charger     Switching Charger     Switching Charger     Switching Charger     Switching Charger    
Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)     Standalone (RC-Settable)    
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     2.10 | 1ku     2.00 | 1ku     2.00 | 1ku     3.50 | 1ku    

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