DS2788E+T&R

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The DS2788 is a dual-channel linear lithium-ion battery fuel gauge that accurately measures the remaining capacity of a battery. It is a system-on-chip solution that integrates multiple functions for battery management, providing a low-cost, high-accuracy solution for fuel gauging. This chip is intended for use in cell-phone, digital camera, and portable device applications.

The DS2788E+T&R provide users with key advantages over competing fuel gauging solutions, including a Mean Time to Empty metric that gives an estimate of remaining battery time. The chip also integrates diagnostic and control functions, such as over temperature and over-voltage protection, that protect the battery from out-of-range conditions. This greatly reduces the need for external components and simplifies board layout.

The measuring accuracy of the DS2788 is supported by extensive diagnosis and auto-calibration features. The monitoring architecture of the chip tracks and records detailed battery performance, enabling users to identify and correct issues with the battery. This makes the DS2788E+T&R well-suited for use in applications where the capacity of the battery must be within tight tolerances.

The DS2788E+T&R measure the capacity of rechargeable batteries by monitoring their coulombic efficiency. The chip uses this measure to calculate the amount of charge that is present in the battery. The DS2788 can read the battery SOC (State of Charge) through a combination of coulomb counting, open circuit voltage, and a timestamp of when the battery data was taken. This allows the battery fuel gauge to accurately measure the capacity of the battery, even after long periods of storage.

The DS2788E+T&R measure current and record constants, like the internal voltage and temperature of the battery, allowing the chip to support numerous safety and system performance enhancements. The chip can detect when the battery is overheating or being incorrectly charged, helping protect the battery from damage. It can also execute a “trickle” charge for safe storage, so that the battery will not be damaged by long periods of inactivity. The chip can also initiate other power management operations, like low-voltage protection, to help ensure the operating specifications of the device.

The DS2788E+T&R is an excellent choice for use in portable and powered device applications where battery fuel gauging accuracy and safety are of utmost importance. The chip can greatly reduce the need for external components and simplify board layout, while providing users with reliable battery monitoring and performance analysis.

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