BQ2057TTSG4

Battery Chargers Overview

The BQ2057TTSG4 is a low dropout linear charge controller designed for two-cell lithium-ion or lithium-polymer battery packs. It features an integrated AutoComp algorithm to compensate for cell imbalance during charging, ensuring accurate termination and maximizing pack capacity. The device supports a maximum battery voltage of 8.2V and operates within a supply voltage range of 4.5V to 15V. It utilizes an 8-pin TSSOP package and functions across an industrial temperature range from -20°C to +70°C.

Battery Chargers Feature Summary

• Integrates AutoComp technology to detect and correct cell imbalance during the charging cycle
• Provides low dropout linear regulation for efficient charging of dual-cell lithium-based batteries
• Supports programmable constant current charging with automatic termination capabilities

Battery Chargers Applications

• Portable electronic devices utilizing dual-cell lithium-ion battery configurations
• Lithium-polymer battery management systems requiring compact power solutions
• Industrial equipment operating in extended temperature environments

Battery Chargers Procurement Notes

Verify the specific suffix G4 indicates lead-free compliance and RoHS certification status prior to ordering. Confirm that the 8-TSSOP package dimensions match the target PCB footprint requirements. Ensure the design accommodates the specified thermal dissipation limits for the intended application environment.

Battery Chargers Selection Notes

Select this component when designing for two-series lithium cells requiring precise balancing without complex digital interfaces. Consider the low dropout characteristic for applications where input voltage headroom is limited relative to the battery stack voltage. Evaluate the thermal performance within the 8-TSSOP package against the expected continuous charging current.

Battery Chargers Part Context

This part belongs to the Texas Instruments BQ2057 family of linear charge controllers. The BQ2057 series is engineered for simple, cost-effective charging solutions for multi-cell lithium batteries. The TTSG4 designation specifies the tape-and-reel packaging variant with enhanced environmental compliance compared to standard tube packages.

Battery Chargers Replacement Considerations

The BQ2057TTS is listed as a parameter-equivalent alternative. Verify pin compatibility and functional equivalence before substitution. Note that the base model may differ in packaging format or specific manufacturing revisions.