S-8213AAE-M6T1U

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The S-8213AAE-M6T1U is a single-cell lithium-ion battery monitor IC with a high level of accuracy, safety, and low power consumption. It is designed for applications such as mobile phones and digital cameras, where extended protection and precision are required. This article covers the application field and working principle of the S-8213AAE-M6T1U.

Application Field

The S-8213AAE-M6T1U is most applicable to single-cell lithium-ion batteries ranging from 3.2V to 4.4V in voltage. It offers internal solutions for overcharging, discharging, and overcurrent protection for Li-ion batteries. The device features a built-in timer to switch off between 0 and 600 seconds when an overcurrent or overcharging situation is detected.

The device is suitable for both in-circuit and stand-alone solutions and requires minimal external circuitry. It can be used in portable equipment such as cell phones, digital cameras, and notebook PCs, as well as medical and other industrial applications. The S-8213AAE-M6T1U also includes a key-lock feature (activated by a pin) which, when activated, disables the built-in charging and discharging switches, preventing damage to the battery and enabling the charger to start charging.

Working Principle

The S-8213AAE-M6T1U PMIC monitors and controls the voltage, current, and temperature of single-cell Li-ion batteries. It has eight major components, which when combined enable the device to precisely monitor and control the battery by eliminating the risk of overcharging, discharging, or overheating. These components include:

• Battery voltage and current sensing circuits, to detect overvoltage and overcurrent conditions.
• A comparator, to handle voltage and current threshold detection.
• A voltage feedback control, to maintain the battery voltage at a predetermined level.
• An internal charging switch, to provide charging current control.
• An internal high-side MOSFET switch, to provide current control.
• A timer, to switch off the charging circuit in case of overcharge and to switch off the high-side MOSFET switch in case of overcurrent.
• A temperature monitor, to detect temperatures above the predetermined value.
• A monitor reset circuit, to reset the device in case of overcharge and overcurrent.

The S-8213AAE-M6T1U also integrates a non-volatile memory, which stores its charging profile and allows for different charging/discharge schemes or multiple periods of charging. Furthermore, the device can set the Start/Stop charge voltage, the maximum level of charging current, and the maximum charging time.

Conclusion

The S-8213AAE-M6T1U PMIC is an integrated solution for single-cell Li-ion battery monitoring and control. It offers internal solutions for overcharging, discharging, and overcurrent protection, as well as an integrated non-volatile memory for storing charging profiles. The device has a high level of accuracy, safety, and low power consumption, making it ideal for applications such as mobile phones and digital cameras, where extended protection and precision are required.

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