DS2770AE+025

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The DS2770AE+025 is a Lithium-Ion battery monitor with a built-in one-cell pack for high capacity safety and operation. It is designed for battery management systems responsible for monitoring and managing Li-Ion cells. The chip’s onboard linear charge current controller performs load-sharing and cell balancing to ensure that the pack maintains its rated capacity over the life of the battery.

Application Field and Working Principle

The DS2770AE+025 is designed as a power management integrated circuit (PMIC) battery management solution IC specifically for Li-Ion/LiPo battery application. It features an innovative 20-bit-accurate analog-to-digital converter (ADC) temperature sensing system, over-discharge, over-current and short-circuit protection, and an embedded charge control algorithm that saves components and board space and simplifies system design.

This particular PMIC is ideal for battery-operated applications such as those found in medical and fitness equipment, handheld devices, industrial, telecom and automotive applications. This device has internal safety features to ensure optimal system performance for all operating conditions.

The DS2770AE+025 device can be used for single cell and multiple battery cell packs up to 8-cell in series. The device also incorporates multiple battery system on-chip protection, low-power operation and low component count. The on-chip charge control algorithm manages battery charge and discharge cycles and eliminates the need for external coulomb counters, battery packs and other components.

The PMIC works by monitoring the voltage and current of the battery. It then measures the cell temperature and decides whether to allow charging, discharging or resting, depending on the battery status. The device also monitors over-discharge, over-current and short-circuit conditions.

The on-chip advanced charge controller helps maximize the lifespan of the battery. It features external battery cell balancing while charging. The charge controller will reduce peak charge currents during the life of the battery, ultimately reducing temperature rise.

Lastly, the device helps in providing a unified power system design, by incorporating voltage and current monitoring, and battery protection on a single chip. This helps ease the PCB layout and assembly requirements, reduce electrical noise, and simplify the software complexity.

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