Product details


Number of series cells 1, 2, 3, 4 Charge current (Max) (A) 8.128 Operating Vin (Max) (V) 24 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH Battery charge voltage (Min) (V) 1.024 Battery charge voltage (Max) (V) 19.2 Absolute Vin (safety rating) (Max) ((V)) 30 Control topology Switch-Mode Buck Control interface SMBus Features IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 4.5 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

WQFN (RUY) 28 16 mm² 4 x 4 open-in-new Find other Battery charger ICs


  • Industrial Innovative Charge Controller With Hybrid Power Boost Mode
    • Adapter and Battery Provides Power to System Together for Intel® CPU Turbo Mode
    • Ultra-Fast Transient Response of 150 µs to Enter Boost Mode
    • Hybrid Power Boost Mode from 4.5- to 24-V System
    • Charge 1- to 4-Cell Battery Pack from 4.5- to 24-V Adapter
  • High Accuracy Power and Current Monitoring for CPU Throttling
    • Comprehensive PROCHOT Profile
    • ± 2% Current Monitor Accuracy
    • ± 5% System Power Monitor Accuracy (PMON)
  • Automatic NMOS Power Source Selection from Adapter or Battery
    • ACFET Fast Turn on in 100 µs
  • Programmable Input Current, Charge Voltage, Charge and Discharge Current Limit
    • ±0.4% Charge Voltage (16-mV step)
    • ±2% Input Current (128-mA/step)
    • ±2% Charge Current (64-mA/step)
    • ±2% Discharge Current (512-mA/step)
  • High Integration
    • Battery LEARN Function
    • Battery Present Monitor
    • Boost Mode Indicator
    • Loop Compensation
    • BTST Diode
  • Enhanced Safety Features for Overvoltage Protection, Overcurrent Protection, Battery, Inductor, and MOSFET Short-Circuit Protection
  • Switching Frequency: 600 kHz, 800 kHz, and
    1 MHz
  • Realtime System Control on ILIM Pin to Limit Charge and Discharge Current
  • 0.65 mA Adapter Standby Quiescent Current for Energy Star
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The bq24780S device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multi-chemistry battery charging applications.

The bq24780S device supports hybrid power boost mode (previously called "turbo boost mode"). It allows battery discharge energy to system when system power demand is temporarily higher than adapter maximum power level. Therefore, adapter does not crash.

The bq24780S device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

Through SMBus, system power management microcontroller programs input current, charge current, discharge current, and charge voltage DACs with high regulation accuracies.

The bq24780S device monitors adapter current (IADP), battery discharge current (IDCHG), and system power (PMON) for host to throttle back CPU speed or reduce system power when needed.

The bq24780S device charges 1-, 2-, 3-, or 4-series Li+ cells.

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BQ24800 ACTIVE SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode This product supports battery only boost mode
Similar functionality to the compared device.
BQ25710 ACTIVE SMBus 1-4 cell Buck-Boost battery charge controller w/ system power monitor & processor hot monitor This product is 1-4S buck-boost controller

Technical documentation

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Type Title Date
* Data sheet bq24780S 1- to 4-Cell Hybrid Power Boost Mode Battery Charge Controller With Power and Processor Hot Monitoring datasheet (Rev. C) Mar. 20, 2017
Technical article When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical article Understanding battery charger features and charging topologies Sep. 19, 2016
Technical article Selecting the right battery charger for industrial applications Jul. 13, 2016
Technical article Should I use a linear charger or a switching charger? Oct. 31, 2015
User guide bq24780S EVM User's Guide Apr. 08, 2015

Design & development

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

Hardware development


The bq24780S evaluation module (EVM) is a complete charger module for evaluating the high-efficiency, synchronous, 1-4 cell turbo boost mode battery charge controller with power monitoring and /PROCHOT for CPU throttling, charges one, two, three or four series Li-ion and Li-polymer cells used in (...)


  • Input voltage range: 4.5V to 24V;
  • SMB communication;
  • LED indication for status signals
  • Test points for key signals available for testing purposes;
  • Jumpers for different circuit configuration.

Software development

Battery Management Studio (bqStudio) Software
BQSTUDIO Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 

Reference designs

SMBus 1- to 4-cell Hybrid Power Boost Mode Battery Charge Controller Reference Design
TIDA-00657 The TIDA-00657 reference design enables high efficiency (90+% @1-2A)  and faster charge with high charging current up to 3A. The design uses TI's BQ24780 Industrial Innovative Charge Controlller with Hybrid Power Boost Mode and  also features power and processor hot monitoring capability.
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WQFN (RUY) 28 View options

Ordering & quality

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

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