BQ771803DPJR

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion
Number of Cells:	2 ~ 5
Fault Protection:	Over Voltage
Interface:	--
Operating Temperature:	-40°C ~ 110°C (TA)
Package / Case:	8-WDFN Exposed Pad
Supplier Device Package:	8-WSON (3x4)
Base Part Number:	BQ771803

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Introduction

The BQ771803DPJR is a high-performance, low power, 8-channel configuration and protection circuit implementing 1-Wire communication protocol. It is a cost-effective solution for automotive and industrial applications that require high current battery cell protection. This device provides a battery management solution with protection of each cell, configuring and monitoring different system parameters and providing protection levels that conform to the strict standards of the automotive and industrial markets.

Application Field

The BQ771803DPJR is ideal for use in applications such as battery cell charging, current balancing, over- and under-voltage protection, over-temperature protection and safe handling and storage of battery cells. It is particularly suitable for use in the automotive industry, because it meets the stringent standards for battery cells, as mandated by automotive regulations.The BQ771803DPJR can be used in various applications, such as automotive and industrial batteries, portable medical devices, aeronautical communication systems, and unmanned aerial vehicles (UAVs). In addition, the device is suitable for use in applications profiting from the 1-Wire communication protocol such as industrial automation, gas and oil pipelines, and environmental monitoring systems for air and water quality.

Features

The BQ771803DPJR provides a wide range of features that make it a versatile and easy-to-use device. Some of the device’s most important characteristics include:- Automotive and industrial standard compliant protection- High-current protection, up to 11A- 1-Wire communication protocol for monitoring and configuration- Serial peripherals for programming and communicating- Adjustable discharge, charge, and temperature thresholds- Enhanced LED indicator for status information-Diagnostic and fault protection -Programmable SMBus alerts

Working Principle

The BQ771803DPJR operates as a 1-Wire interfaced multi-channel battery protection circuit. Using 1-Wire communication protocol, the device can be configured and monitored by the master device. Each of its 8-channel configuration isolates the battery cells to protect them against over-discharge, over-charge and over-temperature. The device can detect over-discharge, over-charge and over-temperature conditions, and offer different types of protection, such as latchoff, need-reset, or delay-off. The adjustable charge, discharge, and temperature thresholds allow the battery to operate at the optimal level for its application. In order to configure the device, the master issues a series of commands and data through the 1-Wire bus. These commands are translated by the Protection Circuit into action. The device can also be monitored by the master through the 1-Wire bus, which gives it the ability to monitor battery cell voltages and temperatures, check alarm conditions, and monitor the status of the battery cells. Once the device has been configured and the fault conditions determined, it will enable the alarms and protection levels as necessary, while providing visual status information by means of a LED. Furthermore, the device includes protection against short circuit, reverse-battery and cell reversal. Finally, the device features a serial peripheral interface to program and communicate with the protection circuit. The interface also allows the master to query the device for information regarding the status of the cells, configuration and programming commands, and fault status.

Conclusion

The BQ771803DPJR is an advanced and cost-effective protection circuit for industrial and automotive applications requiring 1-Wire communication protocol. It features configuring and monitoring different system parameters and provides protection levels that conform to the strict standards of the automotive and industrial markets. The device protects battery cells from overcharge, discharge and over-temperature conditions and offers adjustable charge, discharge and temperature thresholds. The device can be monitored and configured via the 1-Wire communication protocol, and provides a serial peripheral interface for easy communication and programming with the master device.

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