BQ2057SNG4

Battery Chargers Overview

The BQ2057SNG4 is a low dropout linear charge controller designed for two-cell lithium-ion or lithium-polymer battery packs. It provides an 8.4V regulated output and operates within a supply voltage range of 4.5V to 15V. The device supports programmable charging current and features AutoComp technology for accurate cell balancing. It is housed in an 8-pin SOIC package and functions reliably across an operating temperature range of -20°C to +70°C.

Battery Chargers Feature Summary

• Integrates AutoComp technology to ensure precise balancing between series-connected cells during the charging cycle.
• Utilizes a low dropout linear architecture to efficiently manage power dissipation while regulating the charge process.
• Supports configurable charging parameters, allowing adjustment of the constant current limit to suit specific battery requirements.

Battery Chargers Applications

• Portable electronic devices utilizing dual-cell lithium-ion battery configurations
• Medical equipment requiring reliable and safe battery charging management
• Industrial control systems with sealed lead-acid or lithium-based backup power sources

Battery Chargers Procurement Notes

Verify the component authenticity by checking the manufacturer's marking and datasheet specifications against official Texas Instruments documentation. Confirm that the package type matches the required 8-SOIC footprint and that the temperature rating aligns with the operational environment. Ensure compliance with relevant environmental standards such as RoHS before finalizing procurement decisions.

Battery Chargers Selection Notes

Select this component when designing circuits for two-series lithium-ion batteries requiring simple linear regulation. It is suitable for applications where board space is limited and high-frequency switching noise must be avoided. Consider the thermal performance of the SOIC package under maximum load conditions to ensure stable operation within the specified temperature range.

Battery Chargers Part Context

This part belongs to the BQ2057 family of battery chargers from Texas Instruments. It serves as a dedicated solution for managing the charging profile of 2-cell lithium-ion packs. The device simplifies system design by integrating necessary control logic and power stages into a single compact package, reducing the overall bill of materials for portable electronics.

Battery Chargers Replacement Considerations

Consult the official Texas Instruments product selection guide for verified alternatives. Cross-reference pinouts and electrical characteristics with similar models in the BQ2057 series to ensure functional compatibility without modifying the existing circuit layout.

Battery Chargers FAQ

What is the maximum input voltage supported by the BQ2057SNG4?

The device supports a maximum operating supply voltage of 15V.

Does the BQ2057SNG4 support programmable charging current?

Yes, the charging current can be programmed using external components connected to the appropriate pins.