Texas Instruments recommends a compact layout with the device placed close to the battery, and the power paths should be short and wide to minimize resistance and inductance. A 4-layer PCB is recommended, with the top layer for signals, the second layer for power, the third layer for ground, and the bottom layer for signals.
The sense resistor value depends on the maximum charge current and the desired accuracy. A lower sense resistor value provides better accuracy but increases power loss. A higher sense resistor value reduces power loss but decreases accuracy. TI recommends using the calculation tool provided in the datasheet to determine the optimal sense resistor value.
The EN (enable) pin is used to enable or disable the charger. When EN is high, the charger is enabled, and when EN is low, the charger is disabled. This pin can be used to implement a power-saving feature or to disable the charger during fault conditions.
The BQ296213DSGT has built-in OVP and UVP features. OVP is set to 4.35V, and UVP is set to 2.5V. If the input voltage exceeds the OVP threshold, the charger will shut down. If the input voltage falls below the UVP threshold, the charger will also shut down. These thresholds can be adjusted using external resistors.
The BQ296213DSGT is rated for operation from -40°C to 85°C. However, the device's performance and accuracy may degrade at extreme temperatures. It's essential to ensure proper thermal design and heat dissipation to maintain reliable operation.
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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.
