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 lithium phosphate switched-mode battery charge controller. The device 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 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 Charger IC

 
# Series Cells
Function
Cell Chemistry
Special Features
Battery Charge Voltage (V)
Charge Current (Max) (A)
Control Interface
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
BQ24630 BQ24600 BQ24610 BQ24616 BQ24617 BQ24618 BQ24620 BQ24640
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Charger    Charger    Charger    Charger    Charger    Charger    Charger    Charger   
LiFePO4    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    LiFePO4    SuperCap   
Temp Monitoring (Thermistor Pin)    Power Path
Temp Monitoring (Thermistor Pin)   
Power Path
Standard BAT Temp Monitoring   
JEITA BAT Temp Monitoring (Thermistor Pin)
Power Path   
Power Path
Standard BAT Temp Monitoring   
Power Path
Standard BAT Temp Monitoring   
Temp Monitoring (Thermistor Pin)    Temp Monitoring (Thermistor Pin)   
Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable    Adjustable   
10    10    10    10    10    10    10    10   
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   
-40 to 85    -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    24VQFN    24VQFN    16VQFN    16VQFN   
2.00 | 1ku    2.75 | 1ku    2.75 | 1ku    2.75 | 1ku    2.75 | 1ku    2.75 | 1ku    2.00 | 1ku    2.00 | 1ku   
28    28    28    28    24    28    28    28   
33    33    33    33    33    33    33    33