LTC4071EMS8E#TRPBF

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Today, portable electronics, such as laptops, smart phones, tablets, and wearables, are becoming ubiquitous. These devices rely on miniature and portable rechargeable batteries, which in turn require an efficient and reliable power management integrated circuit (PMIC). The LTC4071EMS8E#TRPBF is an advanced, small footprint power management IC (PMIC) that provides efficient charging for one-cell, Li-ion and Li-polymer rechargeable batteries. It is an adjustable, monolithic, high-performance battery charger ideal for space-constrained portable applications.

Overview of LTC4071EMS8E#TRPBF

The LTC4071EMS8E#TRPBF is a monolithic PMIC that integrates a synchronous boost converter and a Li-ion/Li-polymer battery charger. The device’s small footprint enables space-constrained designs, yet its wide input voltage range allows it to accept USB and DC wall adapter power sources. An additional benefit of the LTC4071EMS8E#TRPBF is its very low operating current (<2.5 μA) and no-load quiescent current (<300 μA). In addition, unlike other battery chargers, the LTC4071EMS8E#TRPBF has a fast reaction time between charging sources, allowing it to draw the appropriate current in milliseconds.

Power Sources

The LTC4071EMS8E#TRPBF can be powered by either a DC wall adapter or a USB source. It can operate with any wall adapter with a DC voltage between 6V and 16V, and a USB source with an input voltage between 4.5V and 6V. It also has a power path function for managing dual power sources, allowing it to draw power from one of the sources and simultaneously charge the battery from the other. The power path feature eliminates the need for manual switching between different power sources, providing flexible power supply options.

Charger Control and Protection

The LTC4071EMS8E#TRPBF features a high-accuracy voltage regulation and adjustable current regulation, allowing it to charge Li-ion and Li-polymer batteries efficiently and safely. Its low operating current and quiescent current minimizes the total system power consumption and maximizes battery life. The LTC4071EMS8E#TRPBF also provides a wide range of protection functions, including input over-voltage protection, battery over-voltage protection, battery under-voltage protection, thermal protection, and short-circuit protection.

LED Indicator

The LTC4071EMS8E#TRPBF is designed to indicate the status of the charger with a tri-color LED indicator. When the charger is in pre-charge mode, the green LED will be lit. During float charging, the blue LED will be lit. If the battery becomes too hot, the red LED will be lit to indicate the thermal protection state.

Conclusion

The LTC4071EMS8E#TRPBF is an advanced PMIC solution for efficient Li-ion/Li-polymer battery charging in space-constrained portable applications. It can accept both DC and USB power sources and draw the appropriate current quickly, while its low operating and quiescent current minimizes power consumption. Additionally, it provides high-accuracy voltage and adjustable current regulation, as well as a wide range of protection functions. The LTC4071EMS8E#TRPBF is ideal for applications that require reliable, low-power battery charging.

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