BQ77908ADBT Allicdata Electronics
Allicdata Part #:

296-31359-ND

Manufacturer Part#:

BQ77908ADBT

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Texas Instruments
Short Description: IC BATT PROT LI-ION/POLY 38TSSOP
More Detail: Battery Multi-Function Controller IC Lithium-Ion/P...
DataSheet: BQ77908ADBT datasheetBQ77908ADBT Datasheet/PDF
Quantity: 1000
Stock 1000Can Ship Immediately
Specifications
Series: --
Packaging: Tube 
Part Status: Not For New Designs
Function: Multi-Function Controller
Battery Chemistry: Lithium-Ion/Polymer
Number of Cells: 4 ~ 8
Fault Protection: Over Current, Over Temperature, Over/Under Voltage, Short Circuit
Interface: I²C
Operating Temperature: -25°C ~ 85°C (TA)
Package / Case: 38-TFSOP (0.173", 4.40mm Width)
Supplier Device Package: 38-TSSOP
Base Part Number: BQ77908
Description

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Introduction

Texas Instruments’ BQ77908ADBT PMIC (Power Management IC) is a battery management solution that is specifically designed for today’s mobile device batteries. This integrated circuit (IC) delivers high rating performance and superior functionalities in portable device applications. In comparison to other power management integrated solutions, BQ77908ADBT PMIC provides comprehensive battery protection while reducing circuit board real estate and component count – making it an attractive, cost-effective solution for mobile device designs.

Application Fields

The BQ77908ADBT PMIC is ideal for various applications. This integrated circuit is optimized for most all kinds of mobile devices, such as tablets, laptops, smartphones and other applications that require reliable battery protection for on-board battery packs. BQ77908ADBT PMIC optimizes performance by utilizing active monitoring, cell balancing and protection.

Battery Management & Protection

BQ77908ADBT PMIC battery protection feature provides adjustable overcharge, overdischarge, overcurrent and short circuit protections to ensure the safety of the device, its battery and its users. The integrated circuit also provides active safety monitoring to ensure maximum safety. Moreover, the battery management system can be configured to charge to a desired maximum voltage level or to fixed levels based on the cell manufacturer’s specifications.

Power Management & Optimization

BQ77908ADBT PMIC power management design is an efficient solution that optimizes multiple power supplies. The IC monitors and manages battery discharge, charging, usage and other parameters during system operation and maintains power balances to deliver optimal performance. This device also provides Li-Ion battery local safety protection and overcharge protection, as well as overvoltage/undervoltage battery shutdown and overvoltage/undervoltage latch protection.

Comparison to Other ICs

BQ77908ADBT PMIC offer improvements compared to traditional isolated power management ICs, such as higher performance, lower system cost and better integration. This IC is also more suitable for mobile device designs under tight size constraints, due to its small size. Furthermore, BQ77908ADBT PMIC has lower power consumption, provides greater flexibility and can be used around the world due to its wide operating temperature range.

Working Principle

BQ77908ADBT PMIC is designed to efficiently monitor and control a wide range of power voltages and currents. The power input of the integrated circuit is composed of a high-efficiency buck converter, charge current source and battery discharge source.The buck converter is used to convert the output of the power source (e.g. USB or wall charger) to the desired battery charging voltage. The charge current source is used to limit the charging current to the desired level. When the integrated circuit is driven with the power source, it functions as a charger, allowing the battery to charge up to the battery overcharge protection (BOP) threshold. When the battery is fully-charged, the device switches to battery discharge mode, in which the battery discharge source limits the discharge current from the battery. In addition, BQ77908ADBT PMIC monitors the battery temperature and adjust the charging and discharging currents accordingly in order to maintain the battery’s safe operating temperature. It also regulates the charge regulator voltage and supports a wide range of battery cell types, such as Li-Ion, Li-Polymer, LiFePO4 and Ni-MH.

Conclusion

Texas Instruments’ BQ77908ADBT PMIC is an integrated solution designed to provide efficient and cost-effective battery management and protection. This device optimizes power management, reduces power consumption and offers numerous additional functionalities to ensure maximum safety of on-board battery packs. With its wide range of operating temperature and various other protective functionalities, BQ77908ADBT PMIC is suitable for most all kinds of mobile device applications.

The specific data is subject to PDF, and the above content is for reference

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