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BQ24618 - 产品图解:
BQ24618-独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器
BQ24618-电池充电器IC-电池管理产品-电源管理
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TI产品 - BQ24618介绍
BQ24618 - 独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器

BQ24618是TI公司的一款电池充电器IC产品,BQ24618是独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器,本页介绍了BQ24618的产品说明、应用、特性等,并给出了与BQ24618相关的TI元器件型号供参考。

BQ24618 - 独立 USB 供能的同步开关模式锂离子或锂聚合物电池充电器 - 电池充电器IC - 电池管理产品 - TI公司(Texas Instruments,德州仪器)

产品特性
  • USB-Friendly 4.7-V to 28-V Input Operating Range
  • Stand-Alone Charge Controller to Support 1 to 6 Li-Ion or Li-Polymer Battery Cells
  • Up to 10-A Charge Current and Adapter Current
  • 600-kHz NMOS-NMOS Synchronous Buck Converter
  • 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% Maximum Effective Duty Cycle
  • Energy Star Low Quiescent Current Iq
    • < 15-µA Off-State Battery Discharge Current
    • < 1.5-mA Off-State Input Quiescent Current
产品应用
  • Tablet PCs
  • Smart Phones
  • Portable Media Players, Navigation Devices, Notebooks and Ultra-Mobile PCs
  • Personal Digital Assistants
  • Handheld Terminals
  • Industrial and Medical Equipment
产品说明

The bq24618 device is highly integrated Li-ion or Li-polymer switched-mode battery-charge controller. The bq24618 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 bq24618 operates from either a USB port or AC adapter and supports charge currents up to 10 A. The device 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 for charge termination. The bq24618 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.

产品器件信息
PART NUMBERPACKAGEBODY SIZE (NOM)
bq24618VQFN (24)4.00 mm × 4.00 mm
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