BQ24314ADSGT

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BQ24314ADSGT, which is a high-efficiency, high-power battery charging switch-mode power supply controller, is widely used as inedependent battery management system and/or battery pack management system, especially in applications of mobile devices. This paper will describe the application fields, how it works and some tips of using this device.

Application fields

BQ24314ADSGT is used in various application fields and systems, the include but not limited to mobile phone, tablet and other mobile devices, portable devices, handheld devices, wearable devices, electric vehicles, and so on. Main applications include:

• Battery and power management system for mobile devices
• Battery charger for lithium ion batteries and related chemistries, such as lithium polymer, polymer chained and many others
• Energy saving management systems for electric vehicles, including charging and discharging control of battery packs, battery packs temperature sensing and power limit control for safe operation
• USB charging port charging control
• Last time charging control systems
• Wide operating temperature range from -40℃ to +85℃ support.

Working principle

The BQ24314ADSGT device includes a high-efficiency power switch-mode power supply controller and provides a complete charging solution. It also includes an integrated low on-resistance switch with low loss at low-current operation. In battery charging applications, BQ24314ADSGT is able to accurately track and control the charging current and voltage while monitoring the ambient temperature of the battery pack. It ensures a safe charging environment with the help of overvoltage, over-temperature and short-circuit protections. This device also supports an integrated thermal setting, a simple thermal management solution. When the battery pack temperature gets too high, the thermal setting will turn off the device and suspend the charging process until the battery pack temperature goes back to an acceptable level, providing a safe operation.

Using Tips

When using the BQ24314ADSGT device, there are several tips to keep in mind:

• Always check the functioning voltage and current of the device. The device is designed to safely operate at upper and lower limits of voltage and current.
• Use an external loop compensator or a temperature compensation circuit for better performance.
• Use the integrated thermal setting to avoid over-temperature conditions.
• Choose the suitable interface for optimised performance. The device supports I2C, GPIO and HVCO interface.
• Connect the device with a high-efficiency power switch-mode power supply controller.
• Make sure external components like capacitor and resistor are selected correctly.

Conclusion

BQ24314ADSGT is a high-efficiency, high-power battery charging switch-mode power supply controller that is widely adopted in various application fields and systems. It provides a complete charging solution with integrated low on-resistance switch and overvoltage, over-temperature, and short-circuit protections. This device also supports an integrated thermal setting, which is able to turn off the device and suspend the charging process when the battery pack temperature gets too high. When using it, always check the functioning voltage and current of the device, use an external loop compensator and temperature compensation circuit for better performance, and choose the suitable interface for optimized performance.

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