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Part Name

BQ24630 Datasheet

Part Name Description Manufacturer
BQ24630 Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger With System Power Selector and Low Iq TI
Texas Instruments TI
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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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