BQ296228DSGR

Battery Management Overview

The BQ296228DSGR is a secondary battery protection integrated circuit from Texas Instruments, designed for overvoltage protection in lithium-ion battery packs. It supports configurations for two, three, or four series-connected cells. The device features a fixed delay timer that triggers an output pin upon detecting an overvoltage condition on any individual cell. It includes a regulated power supply output capable of delivering up to 2 mA to drive always-on circuits such as real-time clock oscillators. The component operates within a voltage range of 3 V to 20 V and functions across a temperature range of -40°C to +110°C.

Battery Management Feature Summary

• Provides independent overvoltage monitoring for each cell in 2-, 3-, or 4-series lithium-ion battery configurations.
• Includes a fixed delay timer to prevent false triggering during transient voltage spikes before activating the protection output.
• Offers a regulated output supply with a maximum current of 2 mA to support always-on system components like RTCs.
• Features self-disable functionality to cut off the regulated output when battery voltage drops below a specific threshold.

Battery Management Applications

• Laptop computers
• Ultrabooks
• Medical devices
• Uninterruptible Power Supply (UPS) systems

Battery Management Procurement Notes

Verify the suffix 'GR' indicates tape-and-reel packaging rather than cut tape. Confirm the specific overvoltage threshold matches the design requirements, as the BQ2962 series offers multiple threshold options. Ensure the application board layout adheres to the thermal and electrical specifications for the 8-WSON package to maintain reliability under high-temperature operating conditions.

Battery Management Selection Notes

Select this component when precise overvoltage protection is required for multi-cell lithium-ion packs without active balancing. The fixed delay timer helps distinguish between actual faults and temporary surges. Consider the low quiescent current if battery life preservation is critical. Verify that the 2 mA output current is sufficient for the connected always-on loads.

Battery Management Part Context

This part belongs to the BQ2962 family of overvoltage protectors. It serves as a secondary protection layer, complementing primary protection mechanisms. The device is manufactured by Texas Instruments and is part of their broader portfolio of power management solutions for portable electronics and industrial applications requiring robust battery safety.

Battery Management Replacement Considerations

Check for other BQ2962 variants with different overvoltage thresholds or delay times. Ensure any substitute maintains compatibility with the 8-WSON package and supports the same number of series cells.