ISL78610ANZ

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The ISL78610ANZ is an automotive qualified, high current, integrated lithium-ion battery management IC supporting up to 10 cells in series. It consists of a powerful analog front end with a high precision coulomb counter, a sophisticated protector block and a slave interface which can be configured to support SMBus or I2C communication. The controller on the IC includes limited flexibility programming features, to enable the design of the battery management electronics to the desired system requirements.

Application Area

The ISL78610ANZ is ideally suited for automotive, industrial, energy storage and office automation applications such as electric vehicles, forklifts and UPS systems. The wide voltage range of this IC allows it to be used in battery stacks of various sizes, from lowest cell three-series all the way up to 10-cell. The ISL78610ANZ has multiple programmable over-current, over-voltage and under voltage protection levels and also provides open wire and short circuit detection, making it suitable for a variety of safety critical battery applications. It also features programmable fast/slow voltage, temperature and current slopes providing additional flexibility in terms of charge and balancing selection.

Working Principle

At the core of the device is the analog front-end, which constantly monitors the stack’s voltage. Using an integrated voltage divider, it sends the cell status information to a controller via the I2C interface. The controller then processes the information to decide whether the pack is too overcharged or too discharged and command the appropriate protection action.

An internal coulomb counter stores the amount of charge or discharge current, and it is also used to measure the cell imbalance. The coulomb counter reset pin is used to periodically reset the counter, with the reset signal being generated either by a microcontroller or by a signal from the charge or discharge circuit.

The ISL78610ANZ has a wide voltage range, making it ideal for automotive or industrial applications. The analog front-end of the device can be configured to detect over-voltage, under-voltage, and over current conditions. Furthermore, it has fast and slow slope current control as well as a programmable gain setting, allowing the device to be used in applications requiring a wide range of conditions.

Summary

The ISL78610ANZ is an integrated, automotive qualified, high-current lithium-ion battery management IC that supports up to 10 cells in series. Its sophisticated protector block, precision coulomb counter, and slave interface make it suitable for a variety of safety critical battery applications. The device has multiple programmable over-current, over-voltage and under voltage protection levels, and can be configured with fast/slow voltage, temperature and current slopes, making it an attractive solution for automotive and industrial applications.

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