LTC4098EPDC#TRPBF

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Introduction

PMIC (Power Management IC) Battery Management enables engineers to provide consistent power supply to electronic components, leading to a more reliable system. The LTC4098EPDC#TRPBF (LTC4098) battery management IC from Linear Technology Corporation is a feature-rich IC specifically designed to provide additional protection and features for Li-Ion/LiMn2O4 batteries.

Application Field

The LTC4098 is particularly useful for applications wherein reliable power management is required. It is designed to be compatible with two-cell, three-cell, or four-cell Li-Ion/LiMn2O4 batteries. Some of the applications that benefit from the LTC4098 are:

• Automotive accessories
• Portable medical equipment
• Wireless data communications
• Consumer electronics products

Features

The LTC4098 has numerous protection and default settings that ensure that the connected battery has reliable power at all times. Featured among them are:

• Active Cell Balancing: Active cell balancing keeps all cells in the Li-Ion/LiMn2O4 battery stack in balance, thus extending the life of the system by preventing the over or undercharging of individual cells.
• Charger Scan: The LTC4098 performs a combination of both temperature and charge rate scanning to detect rapid changes in the environment, such as faulty chargers or over/undervoltage.
• Interrupt Request Output: This feature gives the user a notification when certain critical conditions have been met, such as when the charging voltage is below the set threshold.
• Charger Control Register: This register has several settings that enable the user to control the charging process for optimal efficiency.
• Intelligent Discharge Control: This feature allows the battery to be discharged at any current level, up to the maximum rated current.

Working Principle

The LTC4098 is an autonomous IC with integrated power management functions. It integrates a pack voltage monitor, five battery channels (each with a cell balancer), a supply voltage monitor, two active discharge control, and two charger control registers. The LTC4098 operates by continually monitoring the cells in a Li-Ion/LiMn2O4 battery pack and balancing the cells in order to maintain voltage and temperature balance. The cell balancer attenuates the gradient between cells, thereby extending the life of the pack.

The LTC4098 also has an integrated active discharge controller which monitors the pack voltage and discharges the pack at a rate chosen by the user. The user can adjust the discharge rate by selecting the discharge protection current that is suitable for the particular application. Finally, the integrated charger control register enables the user to control the charging parameters, such as charging current, charging voltage, and charging time.

Conclusion

The LTC4098EPDC#TRPBF (LTC4098) is a feature-rich PMIC that is specifically designed for Li-Ion/LiMn2O4 batteries. It offers a variety of advanced protection and default settings, including active cell balancing, charger scan, interrupt request output, charger control register, and intelligent discharge control. By incorporating these features, the user can ensure reliable power delivery and a longer battery life.

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