Home Power management Battery management ICs Battery charger ICs

BQ24031-Q1

LAST TIME BUY

Automotive Standalone 1-cell 2-A linear battery charger with Dual input and 4.1-V charge Voltage

BQ24031-Q1 is in the process of being discontinued
Consider one of these alternates:
open-in-new Compare alternates
Similar functionality to the compared device
BQ24075-Q1 ACTIVE Automotive Qualified Standalone 1-cell 1.5-A linear battery charger, Power Path and 4.2-V VBAT This product is an automotive qualified, single input, 1.5-A, standalone, single-cell Li-Ion battery charger with power path
BQ25171-Q1 ACTIVE Automotive, 800-mA linear battery charger for 1- to 2-cell Li-ion, LiFePO4, and 1- to 6-cell NiMH This product is an automotive 800-mA Linear Battery Charger for single and multicell Li-ion, LiFePO4 and NiMH

Product details

Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 16 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.1 Battery charge voltage (max) (V) 4.1 Absolute max Vin (max) (V) 18 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), Integrated LDO, Power Path Vin (min) (V) 4.35 Rating Automotive Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 16 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.1 Battery charge voltage (max) (V) 4.1 Absolute max Vin (max) (V) 18 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), Integrated LDO, Power Path Vin (min) (V) 4.35 Rating Automotive Operating temperature range (°C) -40 to 85
VQFN (RHL) 20 15.75 mm² 4.5 x 3.5
  • Qualified for Automotive Applications
  • Small 3.5-mm × 4.5-mm QFN Package
  • Designed for Single-Cell Li-Ion or Li-Polymer-Based Portable Applications
  • Integrated Dynamic Power-Path Management (DPPM) Feature Allowing AC Adapter or USB Port to Simultaneously Power the System and Charge the Battery
  • Power Supplement Mode Allows Battery to Supplement USB or AC Input Current
  • Autonomous Power Source Selection (AC Adapter or USB)
  • Integrated USB Charge Control With Selectable 100-mA and 500-mA Maximum Input Current Regulation Limits
  • Dynamic Total Current Management for USB
  • Supports up to 2-A Total Current
  • 3.3-V Integrated LDO Output
  • Thermal Regulation for Charge Control
  • Charge Status Outputs for LED or System Interface Indicates Charge and Fault Conditions
  • Reverse Current, Short-Circuit, and Thermal Protection
  • Power Good (AC Adapter and USB Port Present) Status Outputs
  • Charge Voltage: 4.1 V or 4.2 V
  • APPLICATIONS
    • Smart Phones and PDAs
    • MP3 Players
    • Digital Cameras
    • Handheld Devices
    • Internet Appliances
  • Qualified for Automotive Applications
  • Small 3.5-mm × 4.5-mm QFN Package
  • Designed for Single-Cell Li-Ion or Li-Polymer-Based Portable Applications
  • Integrated Dynamic Power-Path Management (DPPM) Feature Allowing AC Adapter or USB Port to Simultaneously Power the System and Charge the Battery
  • Power Supplement Mode Allows Battery to Supplement USB or AC Input Current
  • Autonomous Power Source Selection (AC Adapter or USB)
  • Integrated USB Charge Control With Selectable 100-mA and 500-mA Maximum Input Current Regulation Limits
  • Dynamic Total Current Management for USB
  • Supports up to 2-A Total Current
  • 3.3-V Integrated LDO Output
  • Thermal Regulation for Charge Control
  • Charge Status Outputs for LED or System Interface Indicates Charge and Fault Conditions
  • Reverse Current, Short-Circuit, and Thermal Protection
  • Power Good (AC Adapter and USB Port Present) Status Outputs
  • Charge Voltage: 4.1 V or 4.2 V
  • APPLICATIONS
    • Smart Phones and PDAs
    • MP3 Players
    • Digital Cameras
    • Handheld Devices
    • Internet Appliances

The bqTINY™ III series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The bqTINY III series offer integrated USB-port and dc supply (AC adapter), power-path management with autonomous power-source selection, power FETs and current sensors, high accuracy current and voltage regulation, charge status, and charge termination in a single monolithic device.

The bqTINY III series powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination, and allows the system to run with an absent or defective battery pack. This feature also allows for the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. The IC design is focused on supplying continuous power to the system when available from the AC, USB, or battery sources.

The power select pin (PSEL) defines which input source is to be used first (primary source is either AC or USB). If the primary source is not available, then the IC automatically switches over to the secondary source (if available) or the battery as the last option. If the PSEL is set low, the USB input is selected first and (if not available) the AC line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature allows the use of one input connector, where the host programs the PSEL pin according to what source is connected (AC adapter or USB port).

The ISET1 pin programs the battery's fast-charge constant current level with a resistor. During normal AC operation, the input supply provides power to both the OUT (system) and BAT pins. For peak or excessive loads (typically when operating from the USB power, PSEL = low) that would cause the input source to enter current limit (or Q3 – USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in system voltage. This feature allows the selection of a lower current rated adapter based on the average load (ISYS-AVG + IBAT-PGM), rather than a high peak transient load.

The bqTINY™ III series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The bqTINY III series offer integrated USB-port and dc supply (AC adapter), power-path management with autonomous power-source selection, power FETs and current sensors, high accuracy current and voltage regulation, charge status, and charge termination in a single monolithic device.

The bqTINY III series powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination, and allows the system to run with an absent or defective battery pack. This feature also allows for the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. The IC design is focused on supplying continuous power to the system when available from the AC, USB, or battery sources.

The power select pin (PSEL) defines which input source is to be used first (primary source is either AC or USB). If the primary source is not available, then the IC automatically switches over to the secondary source (if available) or the battery as the last option. If the PSEL is set low, the USB input is selected first and (if not available) the AC line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature allows the use of one input connector, where the host programs the PSEL pin according to what source is connected (AC adapter or USB port).

The ISET1 pin programs the battery's fast-charge constant current level with a resistor. During normal AC operation, the input supply provides power to both the OUT (system) and BAT pins. For peak or excessive loads (typically when operating from the USB power, PSEL = low) that would cause the input source to enter current limit (or Q3 – USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in system voltage. This feature allows the selection of a lower current rated adapter based on the average load (ISYS-AVG + IBAT-PGM), rather than a high peak transient load.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet Single-Chip Charge and System Power-Path Management IC datasheet (Rev. B) 06 Oct 2009
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 01 May 2018

Design & development

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

Evaluation board

BQ24031EVM — BQ24031 Evaluation Module regulated for a 6V Battery

The EVM provides a convenient method for evaluating the performance of a charge managementand system power solution for portable applications using the bq24031. A fully designed and tested module is presented. The bq24030/1 has a LDO 6 V regulator connected to the OUT pin. The intent of this (...)

User guide: PDF
Not available on TI.com
Package Pins Download
VQFN (RHL) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos