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Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 1.5 Operating Vin (Max) (V) 16 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (Min) (V) 4.2 Battery charge voltage (Max) (V) 4.2 Absolute Vin (safety rating) (Max) ((V)) 18 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Power Path Operating Vin (Min) (V) 4.35 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

VQFN (RHL) 20 16 mm² 4.5 x 3.5 VQFN (RHL) 20 16 mm² 3.5 x 4.5 open-in-new Find other Battery charger ICs

Features

  • Small 3.5-mm × 4.5-mm VQFN Package
  • Designed for Single-Cell Li-Ion- or Li-Polymer-
    Based Portable Applications
  • Integrated Dynamic Power-Path Management (DPPM)
    Feature Allowing the AC Adapter to Simultaneously
    Power the System and Charge the Battery
  • Power Supplement Mode Allows Battery to Supplement
    the AC Input Current
  • Autonomous Power Source Selection (AC Adapter
    or BAT)
  • Supports Up to 2 A Total Current
  • 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 Status Outputs
  • 4.4-V and 6-V Options for System Output Regulation
    Voltage
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Description

The bq24070 and bq24071 are highly integrated Li-ion linear charger and system power-path management devices targeted at space-limited portable applications. The bq2407x devices offer 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 bq2407x devices power 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 adapter or battery sources.

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Similar but not functionally equivalent to the compared device:
BQ24072 ACTIVE Standalone 1-cell 1.5-A linear charger, Power Path, 4.2-V VBAT and VOUT=VBAT + 225mV This product is a 1.5-A, standalone, single-cell Li-Ion battery charger with power path in a 3x3mm package.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet bq2407x Single-Chip Li-Ion Charge and System Power-Path Management IC datasheet (Rev. G) Dec. 23, 2014
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application notes Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) May 01, 2018
Application notes 2Q 2016 Analog Applications Journal Issue Apr. 26, 2016
Application notes Battery-charging considerations for low-power applications Apr. 26, 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
Application notes Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application Nov. 08, 2012
Application notes Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps Mar. 11, 2009
Application notes Q1 2009 Issue Analog Applications Journal Mar. 11, 2009
User guides Power-Path Li-Ion Charger Selection Oct. 17, 2008
User guides bq24070 1.5-A Single-Chip Li-Ion & Li-Pol Charge Mgmt IC (Rev. A) Aug. 30, 2006

Design & development

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

Hardware development

EVALUATION BOARDS Download
49
Description

The Texas Instruments bq24070EVM is the evaluation module (EVM) for the bq24070 Single-Chip Charge and Dynamic Power-Path Management IC in 3.5x4.5 mm2 QFN package. The EVM is a complete bq24070 based circuit and provides a convenient method to evaluate the operation and performance of the IC.

The (...)

Features
  • Typical input voltage: 5 V
  • Charge current limit: 2 A
  • Output regulation voltage: 4.2 V
  • OUT pin for AC conditions: regulated to 4.4 V

Reference designs

REFERENCE DESIGNS Download
Buck, Linear (1.8V @ 200mA) for Fleet Management
PMP2807 — This is a 4.2V,2A lithium battery charging system off the wide 7V to 42V automotive range. TPS40200 plus external FET switcher provides 5V @ 3A. BQ24070 is the battery charger. TPS64203 switcher plus external FET each used to provide 3.3V and 1.8V. TPS73033 and TPS73018 linear regulators provide low (...)
Design files

CAD/CAE symbols

Package Pins Download
VQFN (RHL) 20 View options

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