BQ2057TS

Battery Chargers Overview

The BQ2057TS is a low dropout linear charge controller manufactured by Texas Instruments, designed for single-cell lithium-ion and lithium-polymer batteries. It operates with a supply voltage range of 4.5 V to 15 V and provides a regulated output voltage of 4.2 V. The device supports a maximum output current of 2 A and is housed in an 8-pin TSSOP package. It functions within a temperature range of -20 °C to +70 °C.

Battery Chargers Feature Summary

• Integrates AutoComp technology for automatic compensation of sense resistor voltage drops
• Provides programmable constant-current charging via an external resistor
• Includes thermal regulation to reduce charging current during high-temperature operation

Battery Chargers Applications

• Single-cell lithium-ion battery charging systems
• Lithium-polymer battery management circuits
• Portable electronic devices requiring linear charge management

Battery Chargers Procurement Notes

Verify the manufacturer designation on the component marking, as Benchmarq is not the producer of this part. Confirm the suffix 'TS' corresponds to the TSSOP-8 package variant. Ensure compatibility with the required 4.2 V output specification for the target battery chemistry before procurement.

Battery Chargers Selection Notes

Select this component when designing for single-cell Li-Ion or Li-Po applications requiring a simple linear charging solution. It is suitable for systems where power dissipation allows for linear regulation and where the 4.5 V to 15 V input range matches the available supply rails. Consider the TSSOP-8 footprint constraints during PCB layout.

Battery Chargers Part Context

This component belongs to the BQ2057 series of battery chargers from Texas Instruments. The series includes variants for different cell counts and voltages, such as the BQ2057W for two-cell applications. The BQ2057TS specifically addresses single-cell requirements with a 4.2 V set point.

Battery Chargers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications against any potential alternative components to ensure functional equivalence.