S-8211CDS-I6T1U

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Power management integrated circuits (PMICs) are key electronic components used in wiring industrial and consumer applications. They play a vital role in controlling, optimizing and converting energy between different power sources. In particular, battery management is a crucial part of PMICs. This article aims to elaborate on the application field and working principle of one such PMIC model - the S-8211CDS-I6T1U.

Applications of S-8211CDS-I6T1U

The S-8211CDS-I6T1U is a lithium battery charge/discharge protection IC that provides protection for one-cell lithium-ion and lithium-polymer battery. It is specifically used in a wide range of products such as portable devices like portable media players, digital cameras, smart phones, etc. and industrial applications including robots, drones, radio control toys, etc.

Moreover, the S-8211CDS-I6T1U includes a number of features to ensure reliable system operation and safety. These features have been tailored to meet typical safety requirements set forth by several different bodies including EN60950-1, UL 60950-1, EN50121-1, etc.

The S-8211CDS-I6T1U has a charge/discharge detection circuit and short circuit and over-current/over-voltage protection circuit to prevent damage to lithium batteries. Additionally, it has charge current mode, discharge current mode and short circuit protection mode to ensure safe charging, discharging and short circuit detection, respectively.

Working Principle of S-8211CDS-I6T1U

The S-8211CDS-I6T1U includes an N-channel MOSFET and a bipolar transistor (FET and BJT) in addition to a bunch of integrated resistors and capacitors. The FET and BJT are key components in the circuit operation.

When a battery is connected to the charge/discharge terminal, a voltage difference is generated between the junction of the FET and BJT, which helps to trigger the IC to enable charging or discharging. During normal operation, the FET and BJT capacitors generally remain in a non-conductive, high resistance state.

The FET and BJT capacitors can sense the voltage between their respective junctions and adjust their conductivity accordingly. When the voltage between junctions exceeds a predetermined threshold, the FET and BJT operation will change to conductive, low resistance state in order to prevent any further damage. This changes the charge/discharge current to a safe level so that the battery is protected from overcharging or over-discharging.

In addition to that, the S-8211CDS-I6T1U also includes current detection circuit and temperature detection circuit to ensure further safety. The current detection circuit monitors the input current and output current and sends signals to the IC when it exceeds a set threshold. The temperature detection circuit monitors the battery temperature and sends signals to the IC to enable shutdown when it reaches a high temperature.

Conclusion

In conclusion, the S-8211CDS-I6T1U PMIC enables battery protection by providing charge/discharge detection, current detection, and temperature detection circuit. This simplifies designing products that use batteries and ensures the safety of the battery is maintained. It is suitable for portable and industrial applications and has been tailored to meet typical safety requirements of several different bodies including EN60950-1, UL 60950-1, EN50121-1, etc.

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