HomedatasheetBQ24105RHLR

BQ24105RHLR Datasheet

SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT IC WITH INTEGRATED POWER FETs (bqSWITCHER™)
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Description

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.

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

Features

Parameters


Manufacturer information

TEXAS INSTRUMENTS

Texas Instruments introduction - Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world's brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today.

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