Product details


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 interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), Integrated LDO, 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 3.5 x 4.5 VQFN (RHL) 20 16 mm² 4.5 x 3.5 open-in-new Find other Battery charger ICs


  • 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 the AC Adapter or the USB Port
    to Simultaneously Power the System and Charge
    the Battery
  • Power Supplement Mode Allows Battery to Supplement
    the 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
  • 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
  • Power Good (AC Adapter and USB Port Present)
    Status Outputs
  • Charge Voltage Options: 4.1 V, 4.2 V, or 4.36 V
    • Smart Phones and PDAs
    • MP3 Players
    • Digital Cameras Handheld Devices
    • Internet Appliances

All other trademarks are the property of their respective owners

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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 – AC or USB). If the primary source is not available, then the IC automatically switches over to the other 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 adaptor or USB port).

The bq24038 replaces USBPG with pin VBSEL, to enable user selection of the charge voltage. In addition, pin ACPG was modified to PG. PG is active low when either ac power or USB power is detected.

The ISET1 pin programs the battery&3146;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 adaptor based on the average load (ISYS-AVG + IBAT-PGM ) rather than a high peak transient load.

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BQ24072 ACTIVE Standalone 1-cell 1.5-A linear battery charger, Power Path, 4.2-V VBAT and VOUT=VBAT + 225mV This product is a single input, 1.5-A, standalone, single-cell Li-Ion battery charger with power path in a 3x3mm package.
LM3658 ACTIVE Dual source USB/AC Li chemistry charger IC for portable applications This product is a dual input Li-Ion battery charger in a 3x3mm package.

Technical documentation

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Type Title Date
* Data sheet bq2403x Single-Chip Charge and System Power-path Management IC (bqTINY™) datasheet (Rev. I) Dec. 30, 2014
Technical article When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) May 01, 2018
Technical article Should I use a linear charger or a switching charger? Oct. 31, 2015
Technical article Summertime and the livin' is easy Jun. 20, 2014
User guide Power-Path Li-Ion Charger Selection Oct. 17, 2008
User guide bq2403x (bqTiny-111) 1.5-A Single-Chip LiIon & Li-Pol Charge Mgmt IC EVM (Rev. A) Dec. 11, 2006

Design & development

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

Hardware development

document-generic User guide

The Texas Instruments bq24030EVM is the evaluation module (EVM) for the bq24030 Single-Chip Charge and Dynamic Power-Path Management IC in 3.5x4.5mm2 QFN package. The EVM is a complete bq24030 based circuit and provides a convenient method to evaluate the operation and performance of the IC.

The EVM (...)

  • Typical input voltage: 5V
  • Charge current limit: 2A
  • Output regulation voltage: 4.2V
  • OUT pin for AC conditions: regulated to 6V

Software development

Temp Sense Designer Software
TEMPSENSE-SW The TempSense Designer software allows the user to easily design temperature sensing circuits for many of the Texas Instruments battery charger devices. A full listing of the supported devices is included under the "Support" menu in the program. The user can use the thermisters included in the (...)

The program gives the user:

  • Worse-case limits of the resistance
  • Trip voltages
  • Temperatures of the design

Reference designs

Single-Chip Charge and Dynamic Power-Path Management IC Reference Design
TIDA-00045 This reference design is a Single-Chip Charge and Dynamic Power-Path Management IC solution. It is a complete bq24030 based circuit design and provides a convenient method to evaluate the operation and performance of the IC. The development solution includes a tested evaluation board; a user guide (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RHL) 20 View options

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  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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