BQ24103

(ACTIVE) 采用 QFN 封装具有 2A FET 的 bqSWITCHER(TM) 同步开关模式锂离子充电器，1 节或 2 节独立版本

说明

The bqSWITCHER? series are highly integrated Li-ion and Li-polymer switch-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 system-controlLED version provides additional inputs for full charge management under system control.

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 V_CC supply is removed.

特性

• Ideal For Highly Efficient Charger Designs For Single-, 
  Two- or Three-Cell Li-Ion and Li-Polymer Battery Packs
• bq24105 Also for LiFePO₄ Battery 
  (see Using bq24105 to Charge the LiFePO₄ Battery)
• Integrated Synchronous Fixed-Frequency PWM Controller 
  Operating at 1.1 MHz With 0% to 100% Duty Cycle
• Integrated Power FETs For Up To 2-A Charge Rate
• High-Accuracy Voltage and Current Regulation
• Available In Both Stand-Alone (Built-In Charge Management and Control) 
  and System-Controlled (Under System Command) Versions
• Status Outputs For LED or Host Processor Interface Indicates 
  Charge-In-Progress, Charge Completion, Fault, and AC-Adapter 
  Present Conditions
• 20-V Maximum Voltage Rating on IN and OUT Pins
• High-Side Battery Current Sensing
• Battery Temperature Monitoring
• Automatic Sleep Mode for Low Power Consumption
• System-Controlled Version Can Be Used In NiMH and NiCd Applications
• Reverse Leakage Protection Prevents Battery Drainage
• Thermal Shutdown and Protection
• Built-In Battery Detection
• Available in 20-Pin, 3,5 mm × 4,5 mm QFN Package
• APPLICATIONS
  • Handheld Products
  • Portable Media Players
  • Industrial and Medical Equipment
  • Portable Equipment

bqSWITCHER, PowerPAD are trademarks of Texas Instruments. 
All other trademarks are the property of their respective owners.