LTC4098EUDC-1#TRPBF

PMIC - Battery Management

The LTC4098EUDC-1#TRPBF is a members of the power management integrated circuit (PMIC) family. It is a combination battery charger and system load switch that can maintain two or three rechargeable Li-ion cells in any combination of series, parallel and/or stackable configuration. This PMIC has a top-level feature-set specifically designed to meet the growing demand for a power management solution with maximum flexibility and minimum board space.

Application Field

The LTC4098EUDC-1#TRPBF is typically used in battery-powered miniature products and mobile devices. It is a fully featured power source for portable electronics that require a widest range of input voltage. Typical applications include Wireless Sensor Networks (WSN), sensor applications, wearable medical devices, and other ultra low power, low voltage systems that require a highest efficiency and lowest heat dissipation power source.

Features

• Flexible Charge Profile with Accurate Voltage Regulation
• 3 Cell (3 Configuration) Charge Algorithm
• Standard 10 mA Control Input
• Integrated 2.5 A Load Switch
• Automatic selection between 3x2.5A and 1X7.5A
• Charge up to 4.2V, max voltage 4.35V
• Improved EMI Shielding to Reduce Conducted and Radiated Noise
• Battery Temperature Monitor Output
• Input Voltage Range of 4.0V to 20.5V

Working Principle

The LTC4098EUDC-1#TRPBF is designed for use in portable applications. It provides system level support for powering rechargeable Li-ion batteries of various combination configurations. The PMIC is capable of controlling the charging process, operating a load switch, monitoring the battery temperature, monitoring battery voltage, and protecting the battery from overcharge, overcurrent and overvoltage.

The PMIC uses a sophisticated battery charging algorithm to detect when charging of each individual cell can be safely initiated. The current or voltage parameter of each cell is monitored and adjusted to ensure safe charging. During charging, the PMIC monitors and checks the voltage and temperature levels of the cell. If an overvoltage, overcurrent, over temperature, or short circuit is detected, the PMIC will cease charging and alert the system accordingly.

Once charging of each cell is complete, the PMIC will turn off the battery charging to avoid overcharging. After that the PMIC will switch between its two operating modes (standby and run) depending on the signal from the control input. If the voltage on the control input is high, the PMIC will operate in the run mode and make a connection between the battery and the circuit. If the voltage is low, the PMIC will operate in the standby mode and disconnect the battery from the circuit to conserve battery life.

Conclusion

The LTC4098EUDC-1#TRPBF is a highly versatile PMIC that can provide a system power management solution for a variety of applications. Its combination of battery charger, system load switch, and protection circuitry provide a high level of flexibility for a wide range of low voltage, portable applications. It is designed to provide a safe, efficient, and reliable power source for a wide range of ultra low power and low voltage applications.