BQ2057TSN

Battery Chargers Overview

The BQ2057TSN is a low dropout linear charge controller designed for lithium-ion and lithium-polymer battery systems. It supports single-cell (4.1V or 4.2V) and dual-cell (8.2V or 8.4V) configurations depending on the specific suffix variant within the BQ2057 family. The device operates with a supply voltage range of 4.5V to 15V and utilizes an 8-pin SOIC package. It features programmable charging current via an external resistor and includes thermal regulation capabilities to manage heat dissipation during the charging process.

Battery Chargers Feature Summary

• Integrates AutoComp technology for automatic compensation of input voltage variations
• Provides programmable constant-current and constant-voltage charging profiles
• Includes thermal regulation to reduce charging current when die temperature reaches a limit
• Offers status indication through a dedicated STAT pin

Battery Chargers Applications

• Portable electronic devices requiring Li-Ion battery management
• Dual-cell lithium polymer battery packs
• Consumer electronics with limited space constraints
• Medical equipment utilizing rechargeable battery systems

Battery Chargers Procurement Notes

Verify the exact voltage specification corresponding to the suffix, as the base model number covers multiple voltage variants. Confirm the package type matches the design requirements, noting that some sources associate this part with SOIC while others may list TSSOP. Ensure compatibility with the target battery chemistry and check for any end-of-life notices or obsolescence warnings from the manufacturer before finalizing procurement plans.

Battery Chargers Selection Notes

Select this component based on the required battery cell count and nominal voltage. The choice between variants depends on whether the application requires 4.1V, 4.2V, 8.2V, or 8.4V output. Consider the available board space for the 8-pin package and the need for external components such as sense resistors and thermistors. Evaluate the thermal performance requirements relative to the expected charging current and ambient operating conditions.

Battery Chargers Part Context

This component belongs to the BQ2057 series of linear charge controllers manufactured by Texas Instruments. The series is designed to simplify battery charging circuitry for portable applications. While the brand in the query is listed as Benchmarq, the primary manufacturer associated with the BQ2057 part number is Texas Instruments. Benchmarq Microelectronics Inc is listed in some databases for similar power support circuits but typically under different part numbers like BQ2056TPN.

Battery Chargers Replacement Considerations

BQ2057TTSTR is identified as a parameter-equivalent replacement for discontinued variants in the series. Other compatible parts include BQ2057CTS and BQ2057TTS, depending on the specific voltage and package requirements. Verify electrical parameters and pinout compatibility before substituting.