BQ24123 同期スイッチモード・リチウムイオン充電IC、EMI 性能改善、1/2 セル | TIJ.co.jp

BQ24123
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同期スイッチモード・リチウムイオン充電IC、EMI 性能改善、1/2 セル

 

概要

The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switched-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced QFN package.

The bqSWITCHER charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user-selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER automatically enters sleep mode when VCC supply is removed.

特長

  • Enhanced EMI Performance
  • Integrated Power FETs For Up To 2-A Charge
    Rate
  • Suitable For 1-, 2-, or 3-Cell Li-Ion and Li-Polymer
    Battery Packs
  • Synchronous Fixed-Frequency PWM Controller
    Operating at 1.1 MHz With 0% to 100% Duty
    Cycle
  • High-Accuracy Voltage and Current Regulation
  • Status Outputs For LED or Host Processor
    Interface Indicates Charge-In-Progress, Charge
    Completion, Fault, and AC-Adapter Present
    Conditions
  • 20-V Absolute Maximum Voltage Rating on IN and
    OUT Pins
  • Accurate High-Side Battery Current Sensing
  • Battery Temperature Monitoring
  • Automatic Sleep Mode for Low Power
    Consumption
  • Reverse Leakage Protection Prevents Battery
    Drainage
  • Thermal Shutdown and Protection
  • Built-In Battery Detection
  • Available in 20-pin 3.5-mm × 4.5-mm VQFN
    Package

機能一覧

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Part number オーダー・オプション Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ24123 ご注文 1
2
3    
Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2
8.4    
4.2
8.4    
Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24120 ご注文 1     Charger     Li-Ion/Li-Polymer     2     4.35     16     20     4.2     4.2     Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 85     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)    
BQ24125 ご注文 1
2
3    
Charger     Li-Ion/Li-Polymer     2     4.35     16     20     2.1     15.5     Integrated FET
OVP
Temp Monitoring (Thermistor Pin)    
Standalone (RC-Settable)     Switch-Mode Buck     Catalog     -40 to 125     VQFN | 20     20VQFN: 16 mm2: 3.5 x 4.5 (VQFN | 20)