BQ29729DSER

Battery Management Overview

The BQ29729DSER is a single-cell battery protection IC from Texas Instruments designed for lithium-ion and lithium-polymer batteries. It provides advanced protection against over-discharge, over-charge, and over-current conditions by monitoring external power FETs. The device operates within a supply voltage range up to 8 V and features a low operating current of 4 uA. Packaged in a compact 6-WSON (1.5x1.5 mm) footprint, it supports surface-mount installation and functions reliably across an extended temperature range of -40°C to +85°C.

Battery Management Feature Summary

• Provides precise monitoring and triggering thresholds for over-current protection during high discharge or charge operations.
• Monitors external power FETs to protect the device from faults caused by charging and discharging currents.
• Includes dedicated functions to monitor and protect against over-charge and deep discharge (battery depletion) states.

Battery Management Applications

• Protection circuits for single-cell lithium-ion battery packs
• Safety management for lithium-polymer battery systems
• Medical devices requiring reliable battery protection

Battery Management Procurement Notes

Verify the specific output voltage rating required for your application, as the BQ297xx series includes variants with different thresholds (e.g., 4.28 V, 4.35 V). Confirm that the 6-WSON package dimensions match your PCB layout constraints. Ensure compatibility with the external MOSFETs selected for current handling. Check the latest datasheet for any process change notifications or material updates.

Battery Management Selection Notes

Select this component when a compact, low-power solution is needed for single-cell Li-ion or Li-Po protection. Compare output voltage specifications against other BQ297xx variants to ensure correct threshold alignment. Consider the WSON-6 package size relative to available board space. Verify that the operating temperature range meets the environmental requirements of the end product.

Battery Management Part Context

This part belongs to the BQ297xx family of single-cell battery protection ICs from Texas Instruments. These devices are engineered to offer precise fault detection for lithium-based chemistries. The family shares common interface characteristics but varies in specific voltage thresholds and feature sets to accommodate diverse battery management requirements.

Battery Management Replacement Considerations

Other members of the BQ297xx series, such as BQ29700, BQ29701, BQ29702, BQ29729, and BQ29732, share similar pinouts and functionality. Substitution requires verifying that the replacement part's output voltage threshold matches the system design requirements.

Battery Management FAQ

What types of batteries does the BQ29729DSER support?

It is designed for use with Lithium-ion and Lithium Polymer batteries.

How does the device handle over-current protection?

It provides precise monitoring and triggering thresholds for over-current protection, functioning during higher discharge/charge rates or fault conditions.

What is the operating supply voltage range?

The device operates with a supply voltage up to 8 V.