S-8261ACKMD-G4KT2G

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Power management integrated circuits (PMICs) are the core components in power systems. Generally speaking, PMICs play the role of intelligent system controllers and feature safety, high efficiency, and high integration. Battery management is one of the main application fields of PMICs. The S-8261ACKMD-G4KT2G is a PMIC designed for battery management.

The S-8261ACKMD-G4KT2G is a 2-channel/4-cell battery protection PMIC with a low on-resistance MOSFET and OVP. It features high accuracy cell balancing, low stand-by current, and low power dissipation. The device uses a highly integrated power over-current protection system to prevent damage to the entire battery system caused by an excessive current. This PMIC is capable of supporting various battery chemistries, making it applicable to different types of rechargeable batteries such as lithium polymer, lithium cobalt oxide, nickel-metal hydride, and lithium iron phosphate.

The S-8261ACKMD-G4KT2G consists of two over-charging protection circuits, four under-voltage protection circuits, and a circuit to balance the battery cells. Each protection circuit is provided with an independent input pin, allowing for compatibility with various battery chemistries. The device supports a wide range of operating voltages from 2.5V to 6.0V, and is able to operate in an ambient temperature range of -40°C to 125°C.

In terms of practical application, the S-8261ACKMD-G4KT2G can be used to protect Li-ion batteries from over-charging, over-discharging and short circuit protection. Its cell balancing feature is able to prevent the battery cells from being overcharged and ensure the safety of the battery pack. Additionally, the device’s high integration and low power dissipation makes it suitable for use in compact mobile and portable devices.

Coming to the working principle of S-8261ACKMD-G4KT2G, the device uses the voltage detection circuit to detect the voltage of each cell in the battery pack. The value is then compared with a specified voltage threshold and an over voltage protection (OVP) circuit is activated when the voltage of the cell exceeds the threshold. Similarly, an over-discharge protection (ODP) circuit is triggered when the cell voltage drops below a certain level.

In addition, the device also features a low on-resistance MOSFET, which is connected to the output pins of the OVP and ODP circuits. When either one of the circuits is activated, the MOSFET is turned off, thus blocking the current flow within the system and protecting the cells from further damage. To adjust the balancing process of the battery cells, there is also a cell balancing circuit. This circuit is designed to monitor the voltage of all cells in the battery pack and adjust the current flow between the cells to ensure they are all balanced.

In conclusion, the S-8261ACKMD-G4KT2G is a PMIC designed specifically for battery management applications. Its high accuracy cell balancing, low stand-by current, and low power dissipation makes it suitable for both portable and mobile devices. The device is also capable of supporting various battery chemistries, allowing for a wide range of applications. With its integrated protection circuits, the device can protect the battery cells from over-charging, over-discharging and short circuit, making it an ideal choice for battery management.

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