Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the high-current paths short and wide, using a solid ground plane, and placing the device near the battery. Additionally, ensure the PCB is designed to handle the high currents and voltages involved.
The sense resistor value depends on the desired current sensing range and the accuracy required. A smaller sense resistor value provides a higher current sensing range but may reduce accuracy. TI provides a sense resistor calculation tool to help with selection. Typically, a 1-10 mΩ sense resistor is used for most applications.
The EN (enable) pin is used to enable or disable the device. When EN is high, the device is enabled, and when EN is low, the device is disabled. This pin can be used to implement a low-power shutdown mode or to control the device's operation based on system requirements.
The BQ29729DSER has built-in OCP and SCP features. To handle these events, connect the OCP and SCP pins to a microcontroller or a dedicated fault handler. When an overcurrent or short-circuit event occurs, the device will assert the OCP or SCP pin, and the system can respond accordingly, such as by shutting down the device or alerting the user.
The BQ29729DSER has a high-power rating, and thermal management is crucial. Ensure good airflow, use a heat sink if necessary, and follow TI's thermal design guidelines. Monitor the device's junction temperature (TJ) and ensure it stays within the recommended operating range (–40°C to 125°C).
Trust Checks
This model has been provided by community users.
Community Provided
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
BQ29729DSER Overview
Use the download button to access the BQ29729DSER schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like BQ297,
or try a keyword search, such as Power Management Circuits
About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
