Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V–28V VCC Input - BQ24610

BQ24610 (ACTIVE)

Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V–28V VCC Input

Description

The bq24610/7 is a highly integrated Li-ion or Li-polymer switch-mode battery charge controller. It offers a constant-frequency synchronous switching PWM controller with high-accuracy charge-current and voltage regulation, charge preconditioning, termination, adapter current regulation and charge status monitoring.

The bq24610/7 charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The bq24610/7 automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent-current sleep mode when the input voltage falls below the battery voltage.

The bq24610/7 controls external switches to prevent battery discharge back to the input, to connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. The bq24610/7 features Dynamic Power Management (DPM). These features reduce battery charge current when the input power limit is reached to avoid overloading the ac adapter when supplying the load and the battery charger simultaneously. A highly accurate current-sense amplifier enables precise measurement of input current from the ac adapter to monitor the overall system power.

Features

  • 600-kHz NMOS-NMOS Synchronous Buck Converter
  • Stand-Alone Charger Support for Li-Ion or Li-Polymer
  • 5-V–28-V VCC Input Operating Range and
    Supports 1–6 Battery Cells (bq24610)
  • 5-V–24-V VCC Input Operating Range and
    Supports 1–5 Battery Cells (bq24617)
  • Up to 10A Charge Current and Adapter Current
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
  • Integration
    • Automatic System Power Selection From Adapter or Battery
    • Internal Loop Compensation
    • Internal Soft Start
    • Dynamic Power Management
  • Safety Protection
    • Input Overvoltage Protection
    • Battery Thermistor Sense Hot/Cold Charge Suspend
    • Battery Detection
    • Reverse Protection Input FET
    • Programmable Safety Timer
    • Charge Overcurrent Protection
    • Battery Short Protection
    • Battery Overvoltage Protection
    • Thermal Shutdown
  • Status Outputs
    • Adapter Present
    • Charger Operation Status
  • Charge Enable Pin
  • 6-V Gate Drive for Synchronous Buck Converter
  • 30-ns Driver Dead-Time and 99.5% Max. Effective Duty
    Cycle
  • 24-Pin, 4-mm × 4-mm QFN package
  • Energy Star Low Quiescent Current Iq
    • < 15-µA Off-State Battery Discharge Current
    • < 1.5-mA Off-State Input Quiescent Current
  • APPLICATIONS
    • Netbook, Mobile Internet Device and Ultra-Mobile PC
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

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

 
Function
Cell Chemistry
# Series Cells
Vin (Max) (V)
Special Features
Battery Charge Voltage (V)
Charge Current (Max) (A)
Charging Control Topology
Control Interface
USB Feature
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ24610 BQ24600 BQ24617 BQ24618 BQ24620 BQ24630 BQ24640
Charger     Charger     Charger     Charger     Charger     Charger     Charger    
Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     LiFePO4     LiFePO4      
2-4 Cells
>4 Cells
Single Cell    
2-4 Cells
>4 Cells
Single Cell    
2-4 Cells
>4 Cells
Single Cell    
2-4 Cells
>4 Cells
Single Cell    
2-4 Cells
>4 Cells
Single Cell    
   
28     28     24     28     28     28     28    
Power Path
Standard BAT Temp Monitoring    
Standard BAT Temp Monitoring     Power Path
Standard BAT Temp Monitoring    
Power Path
Standard BAT Temp Monitoring    
Standard BAT Temp Monitoring     Power Path
Standard BAT Temp Monitoring    
Standard BAT Temp Monitoring    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
10     10     10     10     10     10     10    
Switchmode Buck     Switchmode Buck     Switchmode Buck     Switchmode Buck         Switchmode Buck    
Standalone     Standalone     Standalone     Standalone     Standalone     Standalone     Standalone    
      USB-Friendly          
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    
24VQFN     16VQFN     24VQFN     24VQFN     16VQFN     24VQFN     16VQFN    
2.75 | 1ku     2.75 | 1ku     2.75 | 1ku     2.75 | 1ku     2.00 | 1ku     2.00 | 1ku     2.00 | 1ku    
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