Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector - BQ24630

BQ24630 (ACTIVE)

Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector

Description

The bq24630 is a highly integrated switch-mode battery charge controller designed specifically for lithium phosphate batteries. It offers a constant-frequency synchronous PWM controller with high-accuracy current and voltage regulation, charge preconditioning, termination, adapter current regulation, and charge status monitoring.

The bq24630 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 bq24630 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.

Features

  • 300-kHz NMOS-NMOS Synchronous Buck Converter
  • Stand-Alone Charger Specifically for Lithium Phosphate
  • 5-V–28-V VCC Input Operating Range, Supports 1–7 Battery Cells
  • 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 (DPM)
  • Safety Protection
    • Input Overvoltage Protection
    • Battery Thermistor Sense Suspend Charge at Hot/Cold and
      Automatically ICHARGE/8 at Hot/Cold or Warm/Cool
    • 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 99.95% 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
    • Power Tool and Portable Equipment
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Netbook, Mobile Internet Device, and Ultra-Mobile PC

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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
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
BQ24630 BQ24600 BQ24610 BQ24617 BQ24620 BQ24640
Charger     Charger     Charger     Charger     Charger     Charger    
LiFePO4     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     Li-Ion/Li-Polymer     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    
 
28     28     28     24     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     Standard BAT Temp Monitoring    
Adjustable     Adjustable     Adjustable     Adjustable     Adjustable     Adjustable    
10     10     10     10     10     10    
  Switchmode Buck     Switchmode Buck     Switchmode Buck       Switchmode Buck    
Standalone     Standalone     Standalone     Standalone     Standalone     Standalone    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
24VQFN     16VQFN     24VQFN     24VQFN     16VQFN     16VQFN    
2.00 | 1ku     2.75 | 1ku     2.75 | 1ku     2.75 | 1ku     2.00 | 1ku     2.00 | 1ku    

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