BQ2050HSN-A508

Power management integrated circuits (PMICs) are a fundamental component in the design of most electronic devices, managing a range of power supplies, such as batteries, and providing power to many components, such as microcontrollers and displays. PMICs are used to optimize energy consumption and reliability in these devices while providing better performance. Battery management systems (BMSs) are an important part of PMICs. The BQ2050HSN-A508 is a battery management PMIC designed for a wide range of primary battery applications. This article will discuss the application field and working principle of the BQ2050HSN-A508.

Application Field

The BQ2050HSN-A508 PMIC is designed for applications where a single cell Li-ion or Li-polymer battery is used as the primary power source. It is ideal for any electronic device with a battery, including laptops, power tools, MP3 and CD players, digital cameras, and other portable electronics. It can also be used in general industrial and commercial applications.

The BQ2050HSN-A508 offers a range of features that make it suitable for a wide range of applications. These features include a maximum charging voltage of 4.2V, a total current protection of 6A, a USB input current of 2A, and an internal resistor in series with the battery to provide over-current protection. The integrated circuit also offers over-voltage, over-temperature, and over-current protection for the battery, ensuring its safety at all times.

The BQ2050HSN-A508 also offers a low standby current consumption, which helps to maintain extended battery life in applications where the device is powered off for long periods of time. The integrated circuit is also equipped with an automatic power-off feature that turns the device off when the battery voltage drops below a predetermined threshold. This ensures that the battery will not be over-discharged, which can lead to permanent damage.

Working Principle

The working principle of the BQ2050HSN-A508 PMIC is based on the application of pulse-width modulation (PWM) to manage battery voltage and current. It uses four main components to achieve this: the power switch; the current sense circuit; the voltage window comparator; and the onboard microcontroller. The power switch is used to control the flow of current to or from the battery, depending on the voltage and current input. The current sense circuit is used to measure the amount of current flowing through the power switch and calculates the correct duty cycle for the PWM signal.

The voltage window comparator is used to compare the actual battery voltage to the programmed maximum charging voltage. If the voltage falls outside of the preset window, the microcontroller will be notified and will issue a signal to the power switch, shutting it off. This prevents the battery from overcharging, which can lead to damage.

Finally, the onboard microcontroller is used to manage the overall system operation. It monitors the battery voltage and current and triggers the power switch to adjust the voltage and current levels, ensuring that the battery is charged correctly and efficiently.

The BQ2050HSN-A508 PMIC is a versatile, reliable, and cost-effective battery management PMIC that can be used in a range of applications. It offers a wide range of features that make it suitable for many primary battery applications, and provides efficient and reliable power management.