S-8254AAFFT-TB-G Integrated Circuits (ICs)

PMIC - Battery Management: S-8254AAFFT-TB-G Application Field and Working Principle

The S-8254AAFFT-TB-G, a 3A single Li-ion/ Li-polymer battery charger and power supply for mobile phones, digital cameras and portable devices, is a commonly used battery management system in the PMIC (Power Management Integrated Circuit) industry. It approaches a complete power solution for single cell Li-ion/ Li-polymer batteries, providing an ultimate efficiency and an excellent cost-performance ratio. As an Advanced Power Management, the S-8254AAFFT-TB-G, with its high-efficiency step up/step down Li-ion/ Li-polymer battery charger, can drastically reduce power dissipation and lower battery charging times.

Features and Specifications

• High-efficiency step-up/ step-down Li-ion/Li-polymer battery charger
• Input voltage: 4.4V~6.0V
• Charging current: 0.1A~3A
• Charging voltage: 4.2V~4.3V
• Thermal shutdown temperature: 145°C±5°C
• Extremely small form factor: 70LQFP
• JIS-C-8254 compliant
• Excellent cost-performance ratio

Application Fields

The S-8254AAFFT-TB-G is suitable for Li-ion/ Li-polymer battery applications, such as mobile phones, digital cameras and portable devices. Its high-efficiency step up/step down Li-ion/ Li-polymer battery charger enables drastic power dissipation reduction and provides fast battery charging.

Working Principle

The working principle of the S-8254AAFFT-TB-G is quite straightforward: it utilizes a combination of step-up and step-down voltage conversion techniques to provide an efficient charging of Li-ion/ Li-polymer batteries. The S-8254AAFFT-TB-G provides an input voltage range of 4.4V~6.0V and charging current of 0.1A~3A. The charge voltage is set at the factory to 4.2V~4.3V and the thermal shutdown temperature is set to 145°C±5°C. During battery charging, the device repeatedly steps up and steps down the voltage to provide an efficient charging of the Li-ion/ Li-polymer batteries.

To prevent the device from overheating, it utilizes a thermal shutdown circuit to detect any abnormal temperature increase and has its own internal soft start function to avoid overshoot or undershoot during start-up. Moreover, a voltage trimming function is also provided to adjust the output voltage accurately in order to provide precise battery charging.

Conclusion

The S-8254AAFFT-TB-G is an important PMIC system widely used in Li-ion/ Li-polymer battery applications, such as mobile phones, digital cameras and portable devices. Its features include the input voltage range of 4.4V~6.0V and the charging current of 0.1A-3A. Moreover, the thermal shutdown temperature is set to 145°C±5°C, and a voltage trimming function is also provided. It utilizes a combination of step-up and step-down voltage conversion techniques to realize Li-ion/ Li-polymer battery charging.