DS2790G+T&R

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The integration of improved power management integrated circuits has expanded the use of battery applications in a variety of devices. The use of PMICs takes advantage of their wide range of functions and low cost. In particular, Texas Instruments\' DS2790G+T&R combines a battery fuel gauge and a thermistor interface in a monolithic package to provide an optimal design solution for battery-powered applications. This article will discuss the applications and working principles of the DS2790G+T&R.

The Texas Instruments\' DS2790G+T&R PMIC provides reliable battery capacity monitoring and temperature sensing at the same time. The device integrates a fuel gauge, a thermistor interface, and an application processor, all in a single package. This makes it particularly suitable for space-constrained applications, such as mobile devices and wearable electronics. The device is highly efficient, consuming only 0.4 mA when all the blocks are active. In addition, the device can be interfaced with a wide variety of batteries, including lithium-ion, nickel-metal hydride, and lead-acid.

The DS2790G+T&R has many functions and features, including an easy-to-use I2C digital interface, programmable active discharge control and current limit, an impedance tracking voltage monitor, a millisecond-level monitor update time, a thermistor monitor, and a wide temperature range of -40°C to +125°C. In addition, the device also offers a number of safety features, including a low battery indicator, over-voltage protection, and a power-good indicator.

The DS2790G+T&R\'s fuel gauge is based on a patented algorithmic architecture from Texas Instruments. The architecture accurately determines the battery\'s state of health and state of charge. It also calculates remaining capacity and remaining time-to-charge. The fuel gauge also provides advanced safety features by monitoring the battery\'s voltage and temperature. The thermistor monitors enable the device to measure temperature inside of the battery, providing real-time temperature monitoring and over-temperature protection capabilities.

The DS2790G+T&R operates using an 8-bit microcontroller core. The internal program memory stores the application code and configuration data, while the on-chip EEPROM stores user data such as battery profile data, voltage and temperature thresholds, delta voltage thresholds, alarms and alerts, etc. The I2C interface allows the device to exchange data with the external host processors or application processor, allowing the device to be configured, calibrated, monitored, and controlled.

In addition to its fuel gauge and thermistor monitor, the device also provides a Flexible Discharge Path/Active Discharge Control feature. This feature allows users to program the device to discharge safely based on pre-defined parameters. The device also includes an external discharge switch, allowing for manual discharge control. It can be used to switch between the two external terminals of the battery safely and quickly, thereby extending its lifespan.

The DS2790G+T&R is a versatile device that offers a wide range of features and functions. Its integration of a fuel gauge, thermistor interface, and application processor makes it an ideal solution for battery-powered applications. Its high efficiency and wide temperature range make it suitable for a variety of applications. Its Flexible Discharge Path/Active Discharge Control feature and safety features make it a great choice for designers who are looking for a reliable, cost-effective battery management solution.

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