BQ2004HSNG4

BQ2004HSNG4 is a battery selector and charger IC from Texas Instruments, which is incorporated in power management integrated circuits (PMIC) for battery chargers. It allows the selection of one of two rechargeable battery packs from a single charging source. The device is highly integrated, requiring few external components for operation. It also provides a full feature set to enable rapid charging times and optionally charge a fully depleted battery pack.

The BQ2004HSNG4 chip is built around a synchronous buck regulator, which is designed to support a wide range of battery chemistries including NiMH and Li-Ion. It is highly efficient to offer a low operating temperature, long operating life and long battery life. The buck regulator can operate with input voltage from as low as 2.6V to as high as 18V. It can deliver up to 6A of charge current, thus powering a wide range of applications.

The BQ2004HSNG4 features an array of protection features to make sure the battery does not overcharge or over-discharge which can reduce performance and time of life. It offers an output voltage sense that measures the battery voltage in real-time and adjusts the current and voltage outputs accordingly. Additionally, it also comes with active cell balancing which balances the cells in the battery to ensure optimal charge and discharge. It also comes with an internal timer ensuring a safe termination of the charge cycle.

The BQ2004HSNG4 provides robust over-voltage protection, including over-current and under-voltage protection. These safety measures ensure that the battery is not subjected to excessive charge or discharge conditions. The device is also capable of detecting the NTC thermistor temperature sensor in the battery pack. Thepackage is operated through an I2C interface, allowing users to program the level of power output, charge current, and other parameters.

In conclusion, the BQ2004HSNG4 is an unbeatable choice for battery pack selection and charging applications. It has an integrated stepping buck converter, a full array of features for safe charging conditions, and a wide range of voltage and current ratings. This powerful PMIC device is a versatile solution for designing multi-cell battery charger and selector applications.