LTC4069EDC#TRMPBF

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PMIC (Power Management Integrated Circuit) or DC-DC converter, AC-DC converters, or switch mode converters are the devices which are widely used in the control the power supply of the system or device. Battery chargers are one of the most important application of PMIC. The LTC4069EDC#TRMPBF is one such device which is designed to charge the high power and rechargeable Li-Ion and Li-Polymer batteries. It is also applicable for other rechargeable/secondary battery types.

In this article, we will discuss about the application field, features and the working principle of the LTC4069EDC#TRMPBF. This application note is meant to provide a more detailed understanding of the device and how it is used in the design of power management systems.

Application Field

The LTC4069EDC#TRMPBF is ideal for applications such as portable battery-powered systems, portable devices like mobile phones and tablet PCs, as well as DC-DC converters and AC-DC converters being used in industrial, military or medical applications. It is also suitable for use in applications needing high conversion efficiency and low heat dissipation, such as power adapters and replaceable batteries.

The LTC4069EDC#TRMPBF provides excellent load and line regulation, low power quiescent current, low output ripple and noise, and low output voltage dropout. In addition, it has wide input voltage range, wide output current range and flexible charging current control, making it very well suited for battery charging applications.

Features

The LTC4069EDC#TRMPBF provides an integrated solution for charging Li-Ion and Li-Polymer batteries with different capacity, voltage, and current. It supports a wide input voltage range of 2.2V to 12.5V, and a wide output voltage range of 2.5V to 10V. The nominal charging voltage can be adjustable over the range of 2.8V to 10V with a minimum resolution of 0.1V.

The device supports both fast-charging and slow-charging modes. In fast-charging mode, the charge current can be set from 500mA to 2000mA, and in slow-charging mode, the charge current can be set from 50mA to 1000mA. The charge current can be adjusted with the external resistor. The device also provides output overvoltage protection.

Working Principle

The LTC4069EDC#TRMPBF contains an input voltage loop with an overvoltage protection circuit, a voltage regulator, and a charge current-setting circuit. The input voltage is monitored by the overvoltage protection circuit to make sure that it is within the specified operating voltage. The voltage regulator monitors the battery voltage and supplies the required charging current based on the selected charge current setting. The device also containsa charge current setting circuit which sets the current according to the value set on a resistive divider network. The device also offers thermal protection.

The device also contains an external monitoring circuit that can be used to monitor the battery current, battery voltage, and charger output voltage. The device provides indicators to indicate charging status and fault conditions. The status can be monitored and the control terminal can be used to control the charging process.

By utilizing the LTC4069EDC#TRMPBF, developers can generate a very efficient and low-cost battery charger with high power conversion efficiency and low heat dissipation. This makes it a great choice for applications such as mobile devices and industrial/military applications.

The LTC4069EDC#TRMPBF is an excellent choice for battery charging applications. It offers a wide input voltage range, wide output current range and flexible charging current control, ensuring a very efficient and low-cost charging solution.

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