BQ24314DSGR

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion
Number of Cells:	--
Fault Protection:	Over Current, Over Temperature, Over/Under Voltage
Interface:	--
Operating Temperature:	0°C ~ 125°C (TJ)
Package / Case:	8-WFDFN Exposed Pad
Supplier Device Package:	8-WSON (2x2)
Base Part Number:	BQ24314

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IntroductionPower Management Integrated Circuit (PMIC) devices are defined as integrated circuits that are used for managing power for various applications. PMICs are classified into several categories based on their functionalities such as power supplies, voltage regulators, voltage references, protection circuits, etc. In this article, we will focus on Battery Management PMICs and discuss the application fields and working principle of one such PMIC – the BQ24314DSGR from Texas Instruments.BQ24314DSGR Overview The BQ24314DSGR is an advanced battery management integrated circuit (PMIC) from Texas Instruments. It is a fully-integrated non-synchronous boost converter designed specifically to provide fast charging cycles to Li/Ion cell battery packs. The PMIC provides maximum flexibility and enables the product designers to create the most efficient designs in terms of size, cost, and performance.The BQ24314DSGR is a synchronous boost converter with a high-precision adjustable voltage output from as low as 1.8V to as high as 7.0V. The device also provides two independent current measurement inputs for multi-cell configurations. The user can select the output voltage and charging current levels via I2C interface.Application FieldsThe BQ24314DSGR PMIC is ideal for applications such as:• Portable electronic devices such as smartphones and tablets.• Consumer electronics such as cameras and gaming consoles.• Industrial and medical equipment.• Automotive lithium-ion battery packs.• Robotic applications.Working PrincipleThe BQ24314DSGR PMIC operates as a synchronous boost converter. It uses a buck or boost switching topology to step up or step down the input voltage to the desired output voltage. The user can select the output voltage and charging current levels via I2C interface.When the input power source is lower than the output voltage, the boost converter circuit is put into action. The PMIC takes in the input power from the external power source and boosts it up to generate the output voltage needed for charging the battery.When the input power source is higher than the output, the buck converter circuit is used instead. The PMIC takes in the input power from the external power source and steps down the voltage to generate the output voltage needed for charging the battery.This integrated circuit also provides two independent current measurement inputs for monitoring the current of each cell in a multi-cell battery. The PMIC provides overvoltage protection, short-circuit protection, and thermal overload protection for the battery, thus ensuring its safe maximum use.ConclusionThe BQ24314DSGR PMIC from Texas Instruments is designed to provide fast charging and current monitoring capabilities for lithium ion cell battery packs. The PMIC is an ideal choice for a wide range of applications including portable electronic devices, consumer electronics, automotive, industrial, medical, and robotic applications. It works as a synchronous boost or buck converter depending on the input power source and the output voltage. The PMIC also provides two independent current measurement inputs for multi-cell configurations and overvoltage, short-circuit, and thermal overload protection for the battery.

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