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Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 7 Operating Vin (Max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 4.2 Battery charge voltage (Max) (V) 4.975 Absolute Vin (safety rating) (Max) ((V)) 22 Control topology Flash Charger Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), Input OVP, Integrated ADC Operating Vin (Min) (V) 2.8 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

DSBGA (YFF) 42 7 mm² 2.498 x 3.178 open-in-new Find other Battery charger ICs

Features

  • Adapter Input Voltage Range: 3 V to 14 V
    • Allow up to 14-V Adaptor Voltage
  • Highly Integrated 7-A Battery Switch
    • Integrated MOSFETs and Current Sensing
    • Low RDS(on) (13-mΩ) MOSFETs for High Current Operation
  • Integrated High Accuracy ADC for System Monitor
    • VBUS, VBAT, VOUT, VDROP Voltage
    • Input and Battery Current
    • Battery and VBUS Connector Temperature
  • Linear Regulation (LDO) Mode Operation
    • Four Linear Regulation Loops: IBUS, IBAT, VBAT and VOUT
    • Programmable Linear Regulation Thresholds
  • Programmable Safety Protections
    • VBUS, VOUT, and VBAT Over Voltage Protections (OVP)
    • IBUS and IBAT Over Current Protection (OCP)
    • IBUS Reverse Current Protection (RCP)
    • VDROP (VBUS-VOUT) OVP
    • VBUS Connector and Battery Thermal Protection
    • Thermal Shutdown
  • Interrupt Status Output For Host Processor Alert
  • Up To 1-MHz I2C Read and Write Speed
  • Low Battery Leakage Current in Battery Only Mode
  • WCSP Package for Small Footprint
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Description

The device is a 7-A battery switch charger with an integrated 10-bit ADC. The high-current battery switch charger is a 13-mΩ MOSFET with reverse current blocking designed for high efficiency and minimal voltage drop. The high-charge current capability of the device makes it ideal for smartphones, tablets, and other portable devices with large battery capacity.

The integrated 10-bit ADC can measure input voltage and current, battery voltage and current, as well as battery temperature and input connector temperature. This allows the user application to continuously monitor the power input and battery charging parameters to ensure the safety of the battery charging. The flexible OVP and OCP thresholds for VBUS, VOUT, and battery can be modified via I2C registers as the battery goes through constant current (CC) and constant voltage (CV) mode.

The I2C serial interface of the device can operate at speeds up to 1 MHz and allows access to the ADC’s measurements of the different charging parameters and also allows for flexible software control of the device. The INT pin provides instantaneous feedback to the host in case of a fault condition. I2C status registers allow the host to read the current status of all faults and events.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet bq25871 14-V, 7-A, Battery Switch Charger with Integrated 10-bit ADC datasheet Sep. 01, 2016
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application note Flash Battery Charging Pushes the Boundary of Charging Current Mar. 15, 2017
User guide bq25871 and bq25872 PWR813 Evaluation Module User Guide Sep. 27, 2016
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015
Technical articles Summertime and the livin' is easy Jun. 20, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description
The bq25871 evaluation module (EVM) is a complete charger module for evaluating the highly-integrated battery switch in WCSP package for 1 cell Li-Ion and Li-polymer battery in a wide range of smartphone and tablet applications.
Features
  • Input voltage range of 3V to 14V and charge current up to 7A
  • Highly integrated 7A battery switch and high accuracy ADC
  • Programmable protection and safety features
  • Test points for all signals available for testing purposes
  • Jumpers for different circuit configuration

CAD/CAE symbols

Package Pins Download
DSBGA (YFF) 42 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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