LT3651EUHE-8.2#TRPBF

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The LT3651EUHE-8.2#TRPBF is a comprehensive Power Management IC (PMIC) designed for the battery charging needs of portable electronic devices, such as cellular phones and other hand-held communication devices. It integrates multiple linear (DC/DC) and switch-mode power conversion stages, and provides the necessary power conversion and control functions to enable the battery charging from USB or other sources. The LT3651EUHE-8.2#TRPBF also incorporates an LED driver for LED backlighting and a system reset circuit for a total 6.2-Bottle Lipo/Li-ion 3A Battery Charger with Pre-Charge and Charge Error Detection.

Overview

The LT3651EUHE-8.2#TRPBF makes it possible to charge the battery with a constant current/constant voltage (CC/CV) method over a wide range of input voltage levels, allowing the system to charge batteries of various types quickly and efficiently. It also features input protection, battery protection, and thermal protection features to maximize safety and reliability during battery charging operations. The LT3651EUHE-8.2#TRPBF also provides several pre-defined sequences to simplify user-defined settings, as well as programmable charge settings to meet various application needs.

Features & Benefits

The LT3651EUHE-8.2#TRPBF comes with a host of features designed to make the charging process easier and more efficient. It has a charge monitor pin for inhibiting battery charging once a certain threshold is reached, and it can also be used to schedule charging based on time or other operating conditions. The built-in constant current/constant voltage (CC/CV) chargers with overvoltage protection support Li-Ion and Li-Polymer batteries without the need for an external MOSFET. A wide input voltage range of 7 V to 24 V offers flexible design options, while an internal soft-start control helps reduce charging inrush current. The integrated ESR meter of the LT3651EUHE-8.2#TRPBF can be used for determining the cell-to-cell balance of Li-Ion batteries, so users can ensure that their batteries are properly balanced for optimal charge and discharge cycles.

Applications

The LT3651EUHE-8.2#TRPBF is ideally suited for use in a wide range of battery-powered portable applications, including cell phones, laptop computers, PDAs, digital cameras, media players, and other consumer electronics. It is also suitable for industrial and automotive applications.

Working Principle

The LT3651EUHE-8.2#TRPBF is a stand-alone PMIC with an embedded charge pump and power management IC. It is capable of adapting to a wide range of input voltages (7 V to 24 V) and providing an output voltage that meets the user’s application requirements. The device also incorporates an internal linear regulator and current source for charging Li-Ion/Li-Polymer batteries with both constant current and constant voltage. An internal ESR meter allows for cell-to-cell balance of Li-Ion batteries, and programmable charge settings enable the user to create a custom charging profile to suit their specific application needs.

Conclusion

The LT3651EUHE-8.2#TRPBF is a comprehensive power management IC designed specifically for battery charging solutions targeting portable electronic devices. It combines several linear and switch-mode power conversion stages with a dedicated programmable charge cycles, an integrated LED driver, and an ESR meter for Li-Ion/Li-Polymer battery charging. Wide input voltage range, protection features, and flexible charge settings make the LT3651EUHE-8.2#TRPBF a top choice for battery charging requirements and applications.

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