BQ294708DSGT

PMIC - Battery Management

Power Management IC (PMIC) is an integrated circuit (IC) that integrates power management functional blocks into a single chip solution. It is designed to simplify system power-up procedures, improve system performance, and reduce power consumption. It is especially important when power is limited or used consistently in mobile applications. Battery Management (BQ) is one type of PMIC, used to accurately measure and control the current flow in and out of a battery. The BQ294708DSGT is a Battery Management IC from TI that features economical accuracy, robust safety, and low-cost integration.

Application Field

The BQ294708DSGT can be considered a one-chip solution for monitoring, regulating and protecting the charging system in portable devices that use single-cell lithium-ion battery packs. It integrates a power MOSFET, current sense amplifier, battery voltage and temperature monitor, voltage and current measurement, and load current sensing circuit in a single package. It can be used to monitor battery pack charge and discharge current and voltages, as well as the temperature and resistance of the cell. It also offers protection features to help ensure safety of the device.

Working Principle

At its most basic level, the BQ294708DSGT monitors and compares actual cell voltage and current to reference values, allowing for a high degree of accuracy. It constantly measures the voltage, current and temperature of the battery and uses the values to determine its state of charge, temperature and health. Special algorithms are used to power the device on, adjust the battery charge rate, and detect overcharging, overdischarging and other fault conditions. Additionally, the BQ294708DSGT is equipped with protective circuits that can be used to shut off charge and discharge paths when certain thresholds are exceeded. It also helps optimize battery performance over time by adjusting the charging and discharging parameters depending on the cell state.

Conclusion

The BQ294708DSGT is a powerful and efficient device that adds battery protection, monitoring and safety to any system. Its versatility and simplicity make it an excellent choice for any portable system that uses single-cell lithium-ion batteries. Its ability to measure and control the voltage, current and temperature of a cell also makes it a valuable tool for optimizing performance and life of the battery. The highly accurate and robust algorithms, combined with its integrated protection features make the BQ294708DSGT a reliable and cost-effective solution for any battery-powered application.