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BQ24800

ACTIVE

SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode

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Data sheet

BQ24800

ACTIVE
Data sheet Order now

Product details

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 8.128 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 max Vin (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) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 8.128 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 max Vin (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) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RUY) 28 16 mm² 4 x 4
  • Hybrid Power Boost Mode to power up system from adapter and battery together
    • Ultra-fast transient response of 150 µs to enter Hybrid Power Boost Mode
  • Battery Only Boost Mode to extend battery run time
  • Peak power two-level input current limit to maximize the power from adapter and minimize battery discharge
  • 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 when exiting learn mode from battery removal
  • Programmable input current, charge voltage, charge and discharge current limit
    • ±0.4% Charge voltage (16-mV/step)
    • ±2% Input current (64-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 over-voltage protection, over-current protection, battery, inductor, and MOSFET short-circuit protection
  • Switching frequency: 300 kHz, 400 kHz, 600 kHz, and 800 kHz
  • Realtime system control on ILIM pin to limit charge and discharge current
  • 0.65-mA Adapter standby quiescent current for Energy Star
  • Hybrid Power Boost Mode to power up system from adapter and battery together
    • Ultra-fast transient response of 150 µs to enter Hybrid Power Boost Mode
  • Battery Only Boost Mode to extend battery run time
  • Peak power two-level input current limit to maximize the power from adapter and minimize battery discharge
  • 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 when exiting learn mode from battery removal
  • Programmable input current, charge voltage, charge and discharge current limit
    • ±0.4% Charge voltage (16-mV/step)
    • ±2% Input current (64-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 over-voltage protection, over-current protection, battery, inductor, and MOSFET short-circuit protection
  • Switching frequency: 300 kHz, 400 kHz, 600 kHz, and 800 kHz
  • Realtime system control on ILIM pin to limit charge and discharge current
  • 0.65-mA Adapter standby quiescent current for Energy Star

The BQ24800 device is a high-efficiency, synchronous buck battery charger, offering low component count for space-constrained, multi-chemistry battery charging applications.

The BQ24800 device supports hybrid power boost mode. Hybrid power boost mode boosts the battery up to the system voltage in order to supplement the adapter when system power demand is temporarily higher than the adapter is able to provide. The ultra-fast transition from battery charging to battery discharging prevents adapter crash from overloading condition.

The BQ24800 device also supports battery only boost mode when no adapter is present. When the battery voltage is above the minimum system operation voltage, the battery is directly connected to the system supply rail through BATFET. Once the battery voltage goes below the minimum system operation voltage, BQ24800 will turn on the boost mode to regulate the system supply rail, extending the system run time.

The BQ24800 device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

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

The BQ24800 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 BQ24800 device charges 1-, 2-, 3-, or 4-series Li+ cells.

The BQ24800 device is a high-efficiency, synchronous buck battery charger, offering low component count for space-constrained, multi-chemistry battery charging applications.

The BQ24800 device supports hybrid power boost mode. Hybrid power boost mode boosts the battery up to the system voltage in order to supplement the adapter when system power demand is temporarily higher than the adapter is able to provide. The ultra-fast transition from battery charging to battery discharging prevents adapter crash from overloading condition.

The BQ24800 device also supports battery only boost mode when no adapter is present. When the battery voltage is above the minimum system operation voltage, the battery is directly connected to the system supply rail through BATFET. Once the battery voltage goes below the minimum system operation voltage, BQ24800 will turn on the boost mode to regulate the system supply rail, extending the system run time.

The BQ24800 device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

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

The BQ24800 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 BQ24800 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 BQ24800 SMBus 1- to 4-Cell Buck Battery Charge Controller With Peak Power, Hybrid Power Boost and Battery Only Boost Modes datasheet PDF | HTML 28 Feb 2020
Application note Autonomous Smart Battery Guide PDF | HTML 15 Oct 2021
EVM User's guide BQ24800 EVM User's Guide 12 Feb 2020
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Should I use a linear charger or a switching charger? 31 Oct 2015
Technical article Summertime and the livin' is easy 20 Jun 2014

Design & development

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

Evaluation board

BQ24800EVM — SMBus 2-S to 4-S hybrid power boost mode battery charge controller evaluation module

The BQ24800EVM evaluation module (EVM) is an SMBus 2-cell to 4-cell hybrid power boost mode battery charge controller with hybrid boost and processor hot monitoring. The input voltage range is between 4.5 V and 24 V, with a programmable output of 2–4 cells charge voltage and 128-mA to (...)
User guide: PDF
Not available on TI.com
Application software & framework

BQSTUDIO-STABLE — Battery Management Studio (bqStudio) Software – stable version downloads for bq series of TI battery fuel gauges

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 (...)

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Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series
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Application software & framework

BQSTUDIO-TEST — Battery Management Studio (bqStudio) Software – Beta version downloads

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 (...)

Supported products & hardware

Supported products & hardware

Products
Battery monitors & balancers
BQ769142 — 3-s to 14-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4 battery BQ76942 — 3-series to 10-series multicell battery monitor and protector BQ76952 — 3-s to 16-s high-accuracy battery monitor and protector for Li-ion, Li-polymer and LiFePO4
Battery charger ICs
BQ24800 — SMBus 1-4 cell Buck battery charge controller to support hybrid power boost and battery boost mode BQ25720 — SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25723 — I²C 1-4 cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG BQ25731 — I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support BQ25790 — Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger BQ25792 — I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output BQ25756 — Stand-alone or I²C controlled 70-V bidirectional buck-boost charge controller with MPPT
Battery fuel gauges
BQ27220 — Single cell pack/system-side CEDV battery fuel (gas) gauge w/pre-programmed chemistry profiles BQ27320 — Single cell pack/System-side CEDV battery fuel (gas) gauge BQ27425-G1 — System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery BQ27425-G2A — System-side Impedance Track™; fuel gauge for LiCoO2 battery BQ27425-G2B — System-side Impedance Track™; fuel gauge LiMn2O4 battery BQ27510-G3 — System-side Impedance-Track fuel gauge that provides 32 bytes of user-programmable data Flash memory BQ27520-G4 — System side Impedance Track™ fuel gauge with integrated LDO. BQ27530-G1 — System-side Impedance-Track fuel (gas) gauge with direct battery connection BQ27531-G1 — Battery management unit Impedance Track™ fuel (gas) gauge for bq2419x charger controller BQ27532-G1 — Battery management unit Impedance Track™ fuel gauge for bq2425x charger BQ27541-G1 — Pack-side Impedance Track™ battery fuel gauge with integrated LDO BQ27541-V200 — Single cell Li-ion battery fuel gauge for battery pack Integration; FW upgrade to BQ27541 BQ27542-G1 — Single cell Impedance Track™ pack side fuel gauge with SON package BQ27545-G1 — Single cell, pack side, Impedance Track™ fuel gauge BQ27546-G1 — Single cell Impedance Track™ pack side fuel gauge with DSBGA package BQ27621-G1 — System-side fuel gauge with Dynamic Voltage Correlation, battery gas gauge BQ27741-G1 — Pack-side Impedance Track™(tm) fuel (gas) gauge with integrated protector BQ27742-G1 — Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge BQ27Z561 — Impedance Track™ integrated circuit gas gauge solution for 1-series BQ27Z746 — Pack-side, single-cell Impedance Track™ technology fuel gauge with integrated protector BQ28Z610 — Battery fuel gauge with integrated protector for 1-2 series packs BQ34110 — Multi-chemistry high-cell Count battery fuel gauge with integrated rarely discharged module BQ34210-Q1 — Automotive Qualified Single cell system-side CEDV fuel gauge BQ34Z100-G1 — Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge BQ35100 — Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor BQ4050 — 1-4 series CEDV battery fuel (gas) gauge BQ40Z50 — 1-4 series Li-ion battery pack manager | battery fuel (gas) gauge BQ40Z50-R1 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 1.0 BQ40Z50-R2 — 1-4 series Li-ion battery pack manager supporting Turbo Mode 2.0 BQ40Z60 — Complete multi-cell battery manager | battery fuel (gas) gauge BQ40Z80 — 2-s to 6-s battery pack manager with Impedance Track™ gas gauging BQ78350 — Companion CEDV Fuel Gauge Battery Management Controller for bq76940 Monitor Family BQ78350-R1 — CEDV li-ion gas gauge and battery management controller BQ78Z100 — Impedance Track™ battery fuel (gas) gauge for 1-series to 2-series BQ27427 — Single-cell battery fuel gauge with pre-programmed chemistry and integrated sense resistor
Hardware development
MKST-3P-ALT-EV2300 — MKS Technology alternative for EV2300 communications transceiver
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