BQ24156YFFT

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Power management integrated circuits (PMICs) are primarily responsible for ensuring system power efficiency and management. They also provide flexible supply solutions that allow electronic systems to perform as expected. PMICs offer a wide range of solutions, but battery chargers are perhaps one of the most commonly used categories and are found in a variety of applications. The BQ24156YFFT is a fully-featured PMIC battery charger, optimized for space-constrained applications where there is an existing source of power. In this article, the application field of the BQ24156YFFT and its working principle will be discussed.

Introduction to the BQ24156YFFT Battery Charger

The BQ24156YFFT is a single, switch-mode battery charger designed for lead-acid and lithium-ion batteries. It integrates two separate charge paths for single-cell Li-ion battery and two-cell lead-acid battery charging. The BQ24156YFFT provides two switch-mode charge paths for optimized Li-ion and lead-acid battery charging, along with other features such as current and voltage monitoring, fuel gauge charger, AC adapter current monitoring, and programmable charge current limit. The device is offered in a SOP-8 package, giving it a low power dissipation and makes it ideal for a variety of space-constrained applications.

BQ24156YFFT Application Field

The BQ24156YFFT is well-suited for a wide range of applications, thanks to its excellent package size, along with its flexible charge current limit and battery management. The PMIC battery charger can be utilized in applications such as mobile phones, tablets, remote control units, and other handheld devices, making it ideally suited for space-constrained applications. It can also be used for lead-acid batteries for automotive applications like electric vehicles, where space is at a premium.

BQ24156YFFT Working Principle

The BQ24156YFFT utilizes a two-stage charging process to ensure efficient and safe charging. The first stage is constant-current/constant-voltage (CC/CV) where the battery is charged by applying a constant current, allowing the battery to charge at a maximum rate. In this stage, the voltage is ramped up until it reaches the setpoint, at which point the charging current begins to reduce. In the second stage, the charge current is reduced to a maintenance level in order to slow the rate of battery aging. If the battery voltage or temperature exceeds its setpoints, the device will suspend charging in order to prevent damage to the battery.

Additional Features

The BQ24156YFFT provides additional features to guarantee efficient and safe charging, such as:

• AC Adapter Detection: The device is capable of detecting the presence of an AC adapter and can adjust the charging parameters accordingly.
• Input Current Monitoring: The device is able to monitor the input current, allowing it to detect any abnormalities.
• Programmable Charge Current Limit: The device is able to limit the charge current to ensure safe charging.
• Thermal Shutdown: The device is able to detect any overheating and shut down the charging process.

Conclusion

The BQ24156YFFT is a versatile and highly efficient PMIC battery charger, designed for lead-acid and lithium-ion batteries. The device has two switch-mode charge paths for optimized Li-ion and lead-acid battery charging, and comes in an SOP-8 package. The device also provides a wide range of features such as current and voltage monitoring, fuel gauge charger, AC adapter current monitoring, and programmable charge current limit. The BQ24156YFFT is well-suited for a wide range of applications, and is ideally suited for space-constrained applications such as mobile phones, tablets, remote control units, and other handheld devices.

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