BQ771817DPJT

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)

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Introduction

BQ771817DPJT is a power management IC (PMIC) designed specifically for battery management applications. It is specifically optimized for providing a high accuracy, wide range of current sensing and battery diagnostics. This PMIC provides a total of thirty-one precision discharge and charge current paths, with greatly enhanced signal to noise ratios, making it suitable for 10C to 20C current detection. Furthermore, the BQ771817DPJT also provides several additional features such as battery voltage monitoring and accurate active power calculations for estimating remaining capacity.

Features

The BQ771817DPJT is a single-chip, power management IC containing several features specifically designed for battery management. Some of its features include:

• High accuracy, wide range of current sensing
• 30+ precision discharge and charge current paths
• Outstanding signal-to-noise characteristics
• High accuracy active power calculation
• Battery voltage monitoring
• Temperature monitoring
• Low power operation
• Enhanced diagnostics for easily detecting fault conditions

The BQ771817DPJT is capable of supporting a wide range of battery chemistries, including Li-ion, Li-polymer, NiMH and NiCd.

Application Fields

The BQ771817DPJT is primarily designed for use in a variety of portable battery management applications, such as laptops, mobile phones, and portable media players. Its features make it suitable for use in both fixed-rate and stepped-rate battery charge systems. The PMIC can also be used in secondary battery packs, battery chargers, and uninterruptible power supplies (UPSs).

Working Principle

The BQ771817DPJT is a precision controller and diagnostics device specifically designed for battery management applications. It uses an advanced, digital signal processor (DSP) based control system, which provides high accuracy current sensing and voltage monitoring.The BQ771817DPJT is capable of accurately detecting and measuring a range of important battery parameters, including voltage, current, and temperature. The device is also capable of monitoring internal power and output limits, providing outstanding signal-to-noise characteristics. The PMIC also contains comprehensive diagnostics for detecting unusual battery and charging system faults.The PMIC can be used for both non-stepped and stepped-rate battery charging. Non-stepped charging is for low-current applications and is ideal for maintaining battery capacity within its specified range. Stepped-rate charging is used in high-current applications and is useful for rapidly charging a battery when it is running low.

Conclusion

The BQ771817DPJT is an integrated power management IC specifically designed for battery management applications. It is optimized for providing a high accuracy, wide range of current sensing and battery diagnostics. The PMIC can be used in a variety of portable battery management applications, such as laptops, mobile phones and portable media players. Additionally, the device contains comprehensive diagnostics for detecting unusual battery and charging system faults. The BQ771817DPJT is capable of supporting a wide range of battery chemistries, including Li-ion, Li-polymer, NiMH and NiCd.

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