BQ27500DRZT-V120

Series:	Impedance Track™
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Function:	Battery Monitor
Battery Chemistry:	Lithium-Ion
Number of Cells:	1
Fault Protection:	Over Temperature
Interface:	I²C
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	12-VFDFN Exposed Pad
Supplier Device Package:	12-SON (2.5x4)
Base Part Number:	BQ27500

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Introduction

The BQ27500DRZT-V120 is a family of Battery Management Integrated Circuits (ICs) designed to optimize the operation of a lithium-ion cell pack by aggregating and communicating critical information, such as cell voltage, temperature, and state of charge. They are intended for mobile, wearable, and consumer applications. The devices are capable of measuring cell voltages and providing real time information regarding the pack’s capacity and state of health.

Overview

The BQ27500DRZT-V120 is designed to connect to a digital signal processor (DSP) to provide real time information regarding the pack’s capacity and state of health. The ICs measure cell voltages, temperature, and other bi-directional information from a number of lithium-ion cells within a battery pack. This enables the system to monitor and adjust the pack’s charge/discharge cycles to ensure the greatest capacity and life for all the cells contained in the pack.This process helps users make the most efficient use of the power from their battery pack. Additionally, the ICs are also intended to protect the cells contained in the pack from damaging conditions such as overcharging, over discharging, and/or thermal runaway.

Component

The BQ27500DRZT-V120 is a low-power Battery Management IC (BMIC). It consists of an analog interface, a control and logic section, an embedded microcontroller, a power management circuit and a variety of communication protocols.The analog interface features high voltage inputs, temperature sensors, and low voltage input transducers. The temperature sensors detect the temperature of each cell in the battery pack and the overvoltage detector triggers when a cell reaches its maximum voltage. The controller/logic section integrates a microcontroller, high voltage input gate driver, diagnostic circuitry, status register, and register files. This section enables the user to monitor and control the cells in the battery pack.

Applications

The BQ27500DRZT-V120 is intended for use in mobile, wearable, and consumer applications that require efficient power management and enhanced safety. It is suited for applications with multiple cells and requires streaming of cell voltage and temperature data, or data on the state of battery charge from one device to another.The ICs are also well-suited for applications that require monitoring for protection against overcharge, over discharge, and/or thermal runaway. This helps ensure the safety of the cells contained in the battery pack.

Working Principle

The BQ27500DRZT-V120 operates by measuring cell voltages and temperature, and communicating the information to a controlling system. This system aggregates the data and adjusts the pack’s charge/discharge cycles to optimize the capacity and life of all the cells in the pack.The ICs also use protection circuitry to keep the cells in the pack safe by detecting overcharging, over discharging, and/or thermal runaway conditions. If a protection circuit is triggered, the ICs will shut off the power supply or take other corrective measures to keep the cells in safe operating conditions.

Conclusion

The BQ27500DRZT-V120 is a family of Battery Management Integrated Circuits (ICs) designed to optimize the operation of a lithium-ion cell pack. The ICs measure cell voltages and temperature, and provide real time information regarding the pack’s capacity and state of health. Additionally, the ICs are also intended to protect the cells contained in the pack from damaging conditions such as overcharging, over discharging, and/or thermal runaway. This helps ensure the safety of the cells contained in the battery pack. The ICs are ideal for use in mobile, wearable, and consumer applications that require efficient power management and enhanced safety.

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