LTC4162EUFD-LAD#TRPBF

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Integrated circuits (ICs) of power management ICs (PMICs) provide precise voltage regulation for batteries and loads. The LTC4162EUFD-LAD#TRPBF from Linear Technology is a PMIC – Battery Management IC which combines a 500mA primary-side power path manager and buck regulator, an I2C interface and daisy-chainable secondary-side PowerPath battery chargers/boost converters with individually programmable charging/converting profiles. This makes the LTC4162EUFD-LAD#TRPBF suitable for applications like charging multiple Li-Ion cells in parallel, in battery-powered systems where precision control and an I2C control interface are required. In this article we investigate the applications of the LTC4162EUFD-LAD#TRPBF and its working principle.

Applications

The LTC4162EUFD-LAD#TRPBF is designed for powered systems with primary-side DC-DC power conversion and multiple Li-Ion cells in parallel. This IC integrates a main 500mA power path manager and buck regulator and several daisy-chainable battery chargers/boost converters with individually programmable charging/converting profiles. This allows for precise voltage regulation, current margin and protection control within the system. Typical applications for the LTC4162EUFD-LAD#TRPBF include portable designs for medical diagnostics equipment, wireless sensor nodes, smart indoor lighting and fitness technology, USB-powered charging solutions, portable instrumentation and many other battery-powered applications.

Working Principle

The LTC4162EUFD-LAD#TRPBF battery management system consists of a microcontroller, an I2C analog interface, a power path manager, a buck DC-DC converter, and multiple, individually programmable daisy-chainable battery charger/boost converters. The main function of the IC is to control the charging of multiple Li-Ion cells in parallel, providing precision current margin, voltage regulation and protection to each of the cells.

The microcontroller provides an I2C interface, which is used to program the current margin, the protection and conversion features of the daisy-chainable battery chargers/boost converters. The microcontroller monitors the system and adjusts the voltage, current and other parameters of the connected Li-Ion cells accordingly.

The buck DC-DC converter is used to manage the primary power source, which powers the entire system. The converter provides precise voltage regulation and current limiting, and is monitored by the microcontroller.

The LTC4162EUFD-LAD#TRPBF also includes protection features to secure against reverse current, overvoltage and short-circuit conditions. The main input under-voltage lockout feature prevents the system from operating when the supplied voltage is too low, thus protecting against unexpected high or low battery voltages.

Conclusion

The LTC4162EUFD-LAD#TRPBF from Linear Technology is a PMIC – Battery Management IC, designed for applications like charging multiple Li-Ion cells in parallel, where precise voltage regulation and an I2C control interface is required. This integrated circuit includes a 500mA primary-side power path manager and buck regulator and daisy-chainable secondary-side PowerPath battery chargers/boost converter with individually programmable charging/converting profiles. The LTC4162EUFD-LAD#TRPBF provides protection against reverse current, overvoltage and short-circuit conditions, and is suitable for a variety of portable and battery-powered applications.

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