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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