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Product Details

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 VQFN 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 VCC supply is removed.

Products Features

* 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, 3.50 mm × 4.50 mm VQFN
  Package
* APPLICATIONS * Handheld Products
   * Portable Media Players
   * Industrial and Medical Equipment
   * Portable Equipment

Specifications

Actual product photos

Product Data Book：

For more product information, please download the PDF

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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