BQ2057SNTR

Battery Chargers Overview

The BQ2057SNTR is a low-dropout linear charge controller designed for single-cell lithium-ion and lithium-polymer batteries. It operates from a supply voltage range of 4.5 V to 15 V and provides a regulated output voltage of 4.1 V with an output current capability of 2 A. The device utilizes AutoComp technology to compensate for system voltage drops, ensuring accurate charging termination. It is housed in an 8-pin SOIC package and supports surface-mount installation. The component functions within a temperature range of -20 °C to +70 °C.

Battery Chargers Feature Summary

• Integrates AutoComp technology to automatically compensate for system voltage drops during the charging process.
• Provides precise constant-current/constant-voltage charging control for single-cell lithium-ion and lithium-polymer chemistries.
• Features a low dropout regulator architecture allowing operation from standard power sources up to 15 V.

Battery Chargers Applications

• Portable electronic devices requiring single-cell battery management
• Consumer electronics utilizing lithium-ion or lithium-polymer power sources
• Industrial equipment with 4.5 V to 15 V input power constraints

Battery Chargers Procurement Notes

Verify the specific suffix 'SNTR' corresponds to the tape-and-reel packaging format rather than tube packaging when sourcing. Confirm that the 4.1 V output variant matches the application requirements, as other variants may offer different voltage settings. Ensure the SOIC-8 footprint aligns with the PCB design guidelines provided in the official datasheet.

Battery Chargers Selection Notes

Select this component for applications requiring a simple linear charging solution for single-cell Li-Ion or Li-Po batteries. The choice depends on the need for AutoComp functionality to maintain accuracy despite system resistance. Consider the thermal performance limits associated with the SOIC-8 package under maximum load conditions.

Battery Chargers Part Context

This part belongs to the BQ2057 family of battery chargers from Texas Instruments. It shares functional similarities with other members like the BQ2057CTS but differs in package type and specific electrical characteristics such as output voltage tolerance. The SNTR designation indicates a specific reel configuration for automated assembly processes.

Battery Chargers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative components from the same manufacturer or third-party suppliers.

Battery Chargers FAQ

What is the purpose of AutoComp technology in the BQ2057SNTR?

AutoComp technology compensates for voltage drops across system traces and connectors, ensuring accurate charging termination by monitoring the actual voltage at the battery terminals.

Can the BQ2057SNTR charge lithium-polymer batteries?

Yes, the device is designed to support both lithium-ion and lithium-polymer battery chemistries.