BQ24271YFFR

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BQ24271YFFR Application Field and Working Principle

The BQ24271YFFR is a single-chip high score Li-Ion/Li-Polymer Battery Charger and can handle complicated activities such as system management, IC compatibility and the monitoring of Li-Ion/Li-Polymer batteries. This device is an ideal choice for battery-powered consumer, consumer electronics, portable and communication devices that require good battery life expectancy and a safe usage experience. It can be put to use within 24V 8 cells battery programs and offers a variety of charging options and charging current levels.

The BQ24271YFFR is categorized as a PMIC (Power Management Integrated Circuit) and fits into the battery chargers class. This type of integrated circuit devise can be used as a standalone unit or as part of an application-specific management or monitoring system. It usually consists of several closely associated components, each with its own dedicated function. Some of the components used in PMICs include voltage regulators, power converters and power switches.

Application Fields of BQ24271YFFR

The BQ24271YFFR is a highly efficient Li-Ion/Li-Polymer Battery Charger ideal for battery-powered consumer, consumer electronics, portable and communication devices. It is especially suited for high-end smart phone applications due to its high efficiency, low-charge current levels and high-precision battery management.

This device can also be used in 24V 8 cells battery programs, allowing the design engineer to tailor the charger to the exact application requirements, in order to meet all the necessary needs of a battery-powered device. These include the optimization of battery life expectancy and the assurance of a safe user experience.

Working Principle of BQ24271YFFR

The BQ24271YFFR is a single switch with charge and discharge features. It is powered by an external power supply and has an internal DC/DC converter for conversion of voltage for charging the Li-Ion/Li-Polymer battery. The charger also offers a variety of charging profiles as well as automatic current and voltage control.

To charge the battery, the device integrates a power MOSFET switch and current source block, control logic, safety timers, battery temperature monitoring and ADC, among others. The power MOSFET switch is turned on and off at a predetermined frequency, which effectively allows current to flow through the battery. This process is used to charge the battery and is referred to as “pulsed current charging”. The relationship between the on and off times of the current source helps to regulate the current going through the battery.

The BQ24271YFFR also has a built-in charge and discharge control circuit along with a voltage control circuit to ensure that the battery does not overcharge or over-discharge. The voltage control circuit can be configured to set the desired current and voltage level for the battery and the integrated safety timers will ensure that the charging process does not take place for longer than necessary. The charger also features temperature monitoring with an ADC acquisition circuit to measure the internal temperature of the battery.

The BQ24271YFFR also offers an autonomous power down state or an enable state which allows the user to select between a standby mode that allows the device to achieve low quiescent current consumption or an active mode where the device can perform active battery charging. This device also supports several communication interfaces, such as serial I2C, allowing users to control the charger and monitor its activity.

Conclusion

The BQ24271YFFR is a PMIC (Power Management Integrated Circuit) categorized as a battery charger. It is highly efficient and suitable for battery-powered consumer, consumer electronics, portable and communication devices. The device operates by turning on and off its power MOSFET switch at predetermined frequencies, in order to pulse current through the battery and charge it. It also offers several voltage and current levels, temperature monitoring and communication interfaces in order to optimize the charging process.

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