LTC4090EDJC#PBF

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The LTC4090EDJC#PBF is an integrated controller and ideal for cost-effective battery pack management. It maximizes run time with a feature set that includes an integrated safety timer, programmable charge current limit, input current monitor, battery gas gauge, and three-state charger output. The device also monitors cell temperature and provides LED indication. Furthermore, its operating temperature range of -40°C to +85°C combined with its low standby current of 5µA makes it well suited for a wide range of portable applications using rechargeable batteries.

Application Field

The LTC4090EDJC#PBF is suitable for portable battery-powered devices, such as mobile phones, tablets, portable gaming systems, notebook computers, and consumer and security electronics. It is also suitable for electric vehicles, medical equipment, and consumer robotics.

Working Principle

The LTC4090EDJC#PBF is a safety timer-controlled, 2S/3S Li-Ion battery charger with current monitoring, cell temperature monitoring, and LED indication. It automatically adjusts charge current depending on voltage, temperature, and current. Additionally, the device is designed to protect against improper battery connections and to detect overvoltage and thermal runaway conditions.

The LTC4090EDJC#PBF functions as follows: When the device is connected to an AC power source, a wall adaptor or power supply, the application’s battery is charged up to its maximum capacity. During this process, the device automatically adjusts charge current depending on voltage, temperature, and current. Furthermore, it monitors cell temperature and provides LED indication for fault, pass, and done states. Finally, when the application’s battery is fully charged, the device stops charging. Once the device is disconnected from the AC power source, the battery is discharged in a controlled manner to protect it from over-discharge.

Additionally, the LTC4090EDJC#PBF features a programmable charge current limit, input current monitor and three-state charger output. Moreover, it includes a safety timer and various safety features, such as an over-voltage and an over-temperature comparator and timer, a reverse polarity protection switch, and an input current monitor circuit. It also includes an input current detection circuit, which can detect the overloaded and open power sources and abort the charging process, providing protection against improper battery connections.

Conclusion

The LTC4090EDJC#PBF is an integrated controller and ideal for cost-effective battery pack management. It maximizes run time with feature set that includes an integrated safety timer, programmable charge current limit, input current monitor, battery gas gauge, and three-state charger output. The device is well suited for a wide range of portable applications using rechargeable batteries. Furthermore, its protection features, such as an overvoltage and an overtemperature comparator and timer, a reverse polarity protection switch, and an input current monitor circuit provide protection against improper battery connections and detect overvoltage and thermal runaway conditions.

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