TI Home > News Releases

News Releases

TI Introduces 1-A bqTINY™ Li-Ion Battery Charger with LDO Mode and Thermal Management

26-V, Single-Cell Li-Ion Linear Charger with Over-Voltage Protection Provides Safer, Faster Charging in Portable Electronics

Jul 5, 2006

DALLAS (July 5, 2006) -- Texas Instruments (TI) (NYSE: TXN) introduced today a new 1-A, bqTINYTM single-cell lithium-ion (Li-Ion) linear charger with enhanced thermal fold-back regulation and low dropout power management. The new 3 mm x 3 mm device will enable personal digital assistants (PDAs), cell phones, digital cameras and wireless headsets to charge more safely and efficiently from a battery charge cradle or AC adapter. See: www.ti.com/sc06124

The bq24060 battery charger with integrated 1-A power FET and current sensor can withstand an input voltage of up to 26-V. Designed to extend battery life, the device offers complete charge management capability with unique safety and low-dropout features. The bq24060 charges the battery in three phases required by battery cell manufacturers, including pre-charge conditioning, constant or thermally regulated current and accurate constant voltage. The charger's algorithm reduces charge times, maximizes total charge and protects the battery from thermal and electrical dangers. The bq24060 re-starts the charge when the battery voltage falls below an internal threshold, and it enters a low-power sleep mode when the external input supply is removed.
The high-performance linear charger integrates a reverse-blocking protection scheme to prevent battery drainage in the absence of the DC supply. In addition, the bq24060 can be configured to operate in LDO mode to allow the system to fully operate without the battery. The LDO mode feature is also useful for board test before complete system test during the end-equipment manufacturing process.

High-Input Over-voltage and Thermal Protection

The bq24060 also has an over-voltage protection feature that protects the charger and the system during high-voltage conditions by quickly disconnecting them from the adapter. In addition, the bq24060's enhanced thermal fold-back regulation feature allows it to run continuously in harsh environments where the ambient temperature is high, such as in an automobile during the summer, or when connected to an incorrect adaptor with a higher input voltage.

Key Technical Features of the bq24060:

  • Thermal regulation maximizes charge rate 
  • LDO mode operation when timer pin left float 
  • Maximum input voltage of 26-V with over-voltage protection 
  • Integrated power FET and current sensor for up to 1-A charge applications 
  • Reverse leakage protection prevents battery drainage 
  • +/- 0.5 percent voltage regulation accuracy 
  • Charge termination by minimum current 
  • Pre-charge conditioning with safety timer 
  • Status outputs for LED or system interface to indicate charge, fault and power good options 
  • Short-circuit and thermal protection

Pricing and Availability

The bq24060 charger is available today in volume from TI and its authorized distributors. The device comes in a 10-pin, 3 mm x 3 mm MLP package. Suggested retail pricing in 1,000-piece quantities is $1.20. Evaluation modules of the bq24060, design application notes and TI's easy-to-use online power management selection tool are available through power.ti.com.