BQ2057WTSG4

Battery Chargers Overview

The BQ2057WTSG4 is a low dropout linear charge controller designed for two-cell lithium-ion or lithium-polymer battery packs. It operates from a supply voltage range of 4.5V to 15V and provides a regulated output voltage of 8.4V. The device features programmable constant-current charging with an AutoComp feature that adjusts the charge current based on input source impedance. It utilizes an 8-TSSOP surface-mount package and supports operation within a temperature range of -20°C to +70°C.

Battery Chargers Feature Summary

• Integrates AutoComp technology to dynamically adjust charge current according to available input power
• Supports constant-current/constant-voltage charging profiles for two-series cell configurations
• Includes thermal regulation to manage die temperature during high-power charging cycles

Battery Chargers Applications

• Portable electronic devices requiring two-cell lithium-ion battery management
• Laptop and notebook computer battery packs
• Medical equipment utilizing rechargeable lithium-based power sources

Battery Chargers Procurement Notes

Verify component authenticity through authorized distribution channels, as this part number may be subject to obsolescence notices. Confirm RoHS3 compliance status and moisture sensitivity level prior to assembly. Ensure storage conditions adhere to JESD22-A113 standards to prevent lead frame oxidation before soldering.

Battery Chargers Selection Notes

Select this component when designing systems with dual-cell lithium architectures requiring precise voltage regulation. Consider the 8.4V output target specifically for series-connected cells. Evaluate input voltage headroom against the 15V maximum limit to ensure stable linear regulation without excessive heat dissipation under varying load conditions.

Battery Chargers Part Context

This device belongs to the BQ2057 family of battery chargers from Texas Instruments. It serves as a specialized solution for applications needing reliable charging control without complex switching regulator topologies. The G4 suffix indicates lead-free construction compliant with specific environmental directives.

Battery Chargers Replacement Considerations

Public confirmed substitute part numbers include BQ2057WTSTR and BQ2057WTS.