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 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
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 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
WQFN (RUY) 28 16 mm² 4 x 4
  • 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
  • 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

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.

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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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) 20 Mar 2017
Application note Autonomous Smart Battery Guide 15 Oct 2021
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Understanding battery charger features and charging topologies 19 Sep 2016
Technical article Selecting the right battery charger for industrial applications 13 Jul 2016
Technical article Should I use a linear charger or a switching charger? 31 Oct 2015
User guide bq24780S EVM User's Guide 08 Apr 2015

Design & development

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

Evaluation board

BQ24780SEVM-583 — 1-4 Cell Hybrid Power Boost Mode Battery Charge Controller Evaluation Module

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 (...)

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Application software & framework

BQSTUDIO — Battery Management Studio (bqStudio) Software

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 (...)
Reference designs

TIDA-00657 — SMBus 1- to 4-cell Hybrid Power Boost Mode Battery Charge Controller Reference Design

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.
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WQFN (RUY) 28 View options

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