BQ29400ADCT3

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion
Number of Cells:	2 ~ 4
Fault Protection:	Over Voltage
Interface:	--
Operating Temperature:	-25°C ~ 85°C (TA)
Package / Case:	8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
Supplier Device Package:	SM8 (SSOP)
Base Part Number:	BQ29400

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PMIC (power management integrated circuits) are essential components when it comes to the design and management of modern electronics, and Battery Management is one area to benefit especially from the advantages of using PMICs. The BQ29400ADCT3 is a powerful PMIC from Texas Instruments specifically designed for battery management. By combining features such as pack protection, control, sense and diagnostics, it facilitates the safe and efficient performance of battery operated devices.The BQ29400ADCT3 is extremely versatile and capable of managing and balancing single, double and triple cell battery packs with up to 4.20V nominal charge voltage. This PMIC provides for over-voltage, over-current and over-temperature protection, helping to prevent damage to batteries and their electronic application. Additionally, two independent 4-bit DACs can be used to control the charge current, while each cell is monitored separately and feedback is provided on their charge status.The BQ29400ADCT3 is mainly used in battery powered consumer electronics. These include consumer LED lighting systems, electronic toothbrushes, cordless tools, consumer medical electronic equipment and a variety of other battery operated applications.As far as the working principle of the BQ29400ADCT3 goes, it basically revolves around monitoring, controlling, balancing and protecting the embedded batteries in consumer devices. By using its integrated cell protection features, this PMIC can protect the pack from overvoltage, undervoltage, overcurrent and overtemperature conditions. Its high accuracy monitoring, diagnostics, and control techniques make sure that the battery pack is receiving the correct amount of charge and is well protected from adverse conditions.On the monitoring side, the built-in 12-bit ADC allows for cell voltage measurements and independent cell temperature sensing. It also integrates a 4-bit DAC for controlling the charge current, allowing for charging from 0.05mA to 1.5A.When it comes to the balancing of batteries, the BQ29400ADCT3 integrates an advanced cell balancing technique of utilizing a passive cell balancing algorithm. This ensures the individual cells remain balanced in the pack, even during periods of low charge-currents. The cell balancing is achieved through a series of individual N-MOS switches that are employed to balance cells in the presence of a very low PV charge current.Finally, the protection features of this PMIC include an overtemperature and overcharge protection, among other things. When an overcharge condition is detected, the device shuts off the charge current to the battery and enters a safe shutdown state. This prevents damage to the battery by overcharging, overheating, or other abnormalities.In conclusion, the BQ29400ADCT3 is an incredibly versatile and powerful PMIC that is specifically designed for battery management applications. This PMIC helps to protect the batteries and their electronic applications by providing overvoltage, overcurrent and overtemperature protection. Additionally, it allows for the monitoring and balancing of battery cells and provides accurate control of the charge current. All these features make the BQ29400ADCT3 the ideal choice for battery powered consumer electronics such as LED lighting systems, electronic toothbrushes, and cordless tools, among others.

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