BQ27510DRZR-G2 Integrated Circuits (ICs)

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BQ27510DRZR-G2 Application Field and Working Principle

Power management integrated circuits (PMIC) are becoming an increasingly important part of modern electronics, providing an optimized and efficient way to distribute, regulate and control power flows. Battery management (BMS) provides system level monitoring, safety, and control for a variety of battery powered devices. The primary purpose for a BMS is to protect the battery from physical and electrical damage by providing overcharge, overdischarge and overcurrent protection.

The interface between a BMS and the system was designed to keep the system informed of the state of charge (SoC), state of health (SoH), battery temperature and other data while actively providing system level protection. Texas Instruments’ BQ27510DRZR-G2 is a fuel gauge and Protector IC specifically designed to provide these key functions in a single device.

The BQ27510DRZR-G2 Application Field

The BQ27510DRZR-G2 IC is a highly integrated device that is perfect for single-cell, multi-cell and multi-state battery packs from 3.6V to 40V. It also incorporates a proprietary guard fence and other deep discharge protection algorithms to ensure more reliable performance of the fuel gauge. This IC simplifies the integration of system components and decreases cost for the user.

Texas Instruments’ BQ27510DRZR-G2 is a very versatile IC that can be used with a plethora of battery applications such as:

• Portable Medical Equipment
• Portable Consumer Electronics
• Power Tools
• Industrial Equipment
• Automotive and other Transportation Applications
• Remote Monitoring and Control Equipment
• Back Up Power Systems

The BQ27510DRZR-G2 Working Principle

The BQ27510DRZR-G2 is designed to accurately measure and report battery parameters, such as SoC, SoH and temperature. This IC also allows for end-of-charge indication, over-voltage indication, low battery indication, and system reset indication. It also features the popular ΔQ algorithm and two proprietary algorithms, such as Flexible Memory Algorithm (FMA) and Battery Rate Adaptor (BRA), that are used to accurately measure and track battery state-of-charge (SoC).

The BQ27510DRZR-G2 IC features a proprietary protection circuit which is explicitly designed to monitor and protect the battery. It works by monitoring the cell voltage as well as the temperature of the cell. If either of these conditions is outside of the allowable tolerance range, the protection circuit will rapidly shut off the battery to protect it from damage. This protection circuit can also be used in conjunction with an external over current protection circuit to protect the battery from excessive current.

In addition to its safety features, the BQ27510DRZR-G2 also offers an efficient communications interface which allows the system to communicate with the fuel gauge. This communication interface is used to read and write parameters to the IC, as well as monitor various status information about the system. It use a Serial Peripheral Interface (SPI) capable of both 3- or 4-wire control. That includes the SDIN, SDOUT, SCLK and CS# signals. The SDOUT and CS# signals can be shared with the external protection circuit, allowing for quicker data updates with less wasted time.

Conclusion

The BQ27510DRZR-G2 is an ideal IC for a wide range of battery powered applications such as portable medical devices, consumer electronics, automotive and other transportation applications, remote monitoring and control systems, and back up power systems. Not only does it offer a very efficient communications interface in the form of Serial Peripheral Interface (SPI), but it also features a proprietary protection circuit which is designed to monitor and protect the battery from overvoltage and overtemp conditions. As such, this IC is a perfect choice for any battery powered application that requires accurate fuel gauge measurements and system level protection.

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