Top

Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 2 Operating Vin (Max) (V) 16 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 4.2 Battery charge voltage (Max) (V) 4.2 Absolute Vin (safety rating) (Max) ((V)) 20 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features Input OVP, BAT temp thermistor monitoring (hot/cold profile) Operating Vin (Min) (V) 4.35 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RHL) 20 16 mm² 3.5 x 4.5 open-in-new Find other Battery charger ICs

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

All other trademarks are the property of their respective owners

open-in-new Find other Battery charger ICs

Description

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.

open-in-new Find other Battery charger ICs
Download

Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

SUPPORT SOFTWARE Download
Temp Sense Designer Software
TEMPSENSE-SW The TempSense Designer software allows the user to easily design temperature sensing circuits for many of the Texas Instruments battery charger devices. A full listing of the supported devices is included under the "Support" menu in the program. The user can use the thermisters included in the (...)
Features

The program gives the user:

  • Worse-case limits of the resistance
  • Trip voltages
  • Temperatures of the design

CAD/CAE symbols

Package Pins Download
VQFN (RHL) 20 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​