BQ24018 Status: ACTIVE

Product Information

Features

• Small 3 mm × 3 mm MLP (QFN) Package
• Ideal for Low-Dropout Designs for Single-Cell Li-Ion or Li-Pol Packs in Space LimitedApplications
• Integrated Power FET and Current Sensor for Up to 1-A Charge Applications
• Reverse Leakage Protection Prevents Battery Drainage
• Integrated Current and Voltage Regulation
• ±0.5% Voltage Regulation Accuracy
• Charge Termination by Minimum Current and Time
• Precharge Conditioning With Safety Timer
• Status Outputs for LED or System Interface Indicates Charge and Fault Conditions
• Battery Insertion and Removal Detection
• Works With Regulated and Unregulated Supplies
• Short-Circuit Protection
• Charge Voltage Options: 4.2 V and 4.36 V
• APPLICATIONS
  • Cellular Phones
  • PDAs, MP3 Players
  • Digital Cameras
  • Internet Appliances

bqTINY is a trademark of Texas Instruments.

Description

The bqTINY™ series are highly integrated Li-Ion and Li-Pol linear charge management devices targeted at space limited portable applications. The bqTINY™ series offer integrated powerFET and current sensor, reverse blocking protection, high accuracy current and voltage regulation, charge status, and charge termination, in a small package.

The bqTINY™ charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety feature for charge termination. The bqTINY™ automatically re-starts the charge if the battery voltage falls below an internal threshold. The bqTINY™ automatically enters sleep mode when V_CC supply is removed.

In addition to the standard features, different versions of the bqTINY™ offer a multitude of additional features. These include temperature sensing input for detecting hot or cold battery packs; power good (PG) output indicating the presence of valid input power; a TTL-level charge-enable input (CE) used to disable or enable the charge process; and a TTL-level timer and termination enable (TTE) input used to disable or enable the fast-charge timer and charge termination.