Home Power management Battery management ICs Battery charger ICs

BQ24072

ACTIVE

Standalone 1-cell 1.5-A linear battery charger, Power Path, 4.2-V VBAT and VOUT=VBAT + 225mV

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Product details

Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6.4 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 28 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 1.5 Vin (max) (V) 6.4 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 28 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGT) 16 9 mm² 3 x 3
  • Fully compliant USB charger
    • Selectable 100-mA and 500-mA maximum input current
    • 100-mA Maximum current limit ensures compliance to USB-IF standard
    • Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
  • Functional Safety-Capable (BQ24074)
  • 28-V Input rating with overvoltage protection
  • Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
  • Supports up to 1.5-A charge current with current monitoring output (ISET)
  • Programmable input current limit up to 1.5 A for wall adapters
  • System output tracks battery voltage (BQ24072)
  • Programmable termination current (BQ24074)
  • Battery disconnect function with SYSOFF input (BQ24075, BQ24079)
  • Programmable pre-charge and fast-charge safety timers
  • Reverse current, short-circuit and thermal protection
  • NTC thermistor input
  • Proprietary start-up sequence limits inrush current
  • Status indication – charging/done, power good
  • Safety-Related Certification:
    • IEC 62368-1 Certification (BQ24072)
  • Fully compliant USB charger
    • Selectable 100-mA and 500-mA maximum input current
    • 100-mA Maximum current limit ensures compliance to USB-IF standard
    • Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
  • Functional Safety-Capable (BQ24074)
  • 28-V Input rating with overvoltage protection
  • Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
  • Supports up to 1.5-A charge current with current monitoring output (ISET)
  • Programmable input current limit up to 1.5 A for wall adapters
  • System output tracks battery voltage (BQ24072)
  • Programmable termination current (BQ24074)
  • Battery disconnect function with SYSOFF input (BQ24075, BQ24079)
  • Programmable pre-charge and fast-charge safety timers
  • Reverse current, short-circuit and thermal protection
  • NTC thermistor input
  • Proprietary start-up sequence limits inrush current
  • Status indication – charging/done, power good
  • Safety-Related Certification:
    • IEC 62368-1 Certification (BQ24072)

The BQ2407x series of devices are integrated Li-Ion linear chargers and system power path management devices targeted at space-limited portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the BQ2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.

The BQ2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.

The BQ2407x series of devices are integrated Li-Ion linear chargers and system power path management devices targeted at space-limited portable applications. The devices operate from either a USB port or an AC adapter and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the BQ2407x to meet USB-IF inrush current specifications. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing incorrectly configured USB sources.

The BQ2407x features dynamic power path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination and enables the system to run with a defective or absent battery pack.

Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power path management architecture also lets the battery supplement the system current requirements when the adapter cannot deliver the peak system currents, thus enabling the use of a smaller adapter.

The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.

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Technical documentation

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Type Title Date
* Data sheet BQ2407x Standalone 1-Cell 1.5-A Linear Battery Charger with PowerPath datasheet (Rev. N) 27 Oct 2021
Design guide High-Efficiency 24-VAC to 5-V, 3.3-V Ref Design With Battery Backup and Charging PDF | HTML 30 Jun 2023
Application note Configuring Standalone Linear Power Path Chargers (Rev. A) PDF | HTML 06 Apr 2020
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 01 May 2018
Technical article How to choose the right linear charger for your application PDF | HTML 17 Nov 2017
User guide bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) 03 Jan 2017
Analog Design Journal Battery-charging considerations for low-power applications 26 Apr 2016
Product overview Battery Management Solutions for Point of Sale Systems 18 Aug 2014
Product overview Power Bank Charger ICs 25 Feb 2013
Application note Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application 08 Nov 2012
Analog Design Journal Designing a linear Li-Ion battery charger with power-path control 01 May 2009
Analog Design Journal Q2 2009 Issue Analog Applications Journal 01 May 2009
User guide Power-Path Li-Ion Charger Selection 17 Oct 2008

Design & development

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

Evaluation board

BQ24072EVM — BQ24072 USB Li-Ion Battery Charger and Power-Path Management Evaluation Module | Linear

This user’s guide describes the bq24072/3/4/5/9(T) and bq24230/2 (bqTiny-III™) evaluation module (EVM). The EVM provides a convenient method for evaluating the performance of a charge management and system power solution for portable applications using the bq24072/3/4/5/9(T) and (...)

User guide: PDF
Not available on TI.com
Gerber file

HPA282B Gerber Files

SLUC342.ZIP (207 KB)
Gerber file

Linear Charger NTC Calculator

SLUC670.ZIP (350 KB)
Reference designs

TIDA-01395 — 24-V AC Power Stage With Wide Vin Converter and Battery Gauge Reference Design for Smart Thermostat

This reference design provides a low BOM count, high-efficiency power stage for smart thermostats and other gateway building automation designs. This power stage takes a 24-V AC input and produces a 5-V and 3.3-V output rail, which can power additional point-of-load converters if added. The (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010932 — 24-VAC power stage reference design with battery backup

This reference design provides a high efficiency power stage solution for smart thermostats and other gateway building automation end equipment using a 24 VAC power source. This power stage takes a 24-VAC input and produces a 5 V and 3.3 V output rail, which can power additional point-of-load (...)
Design guide: PDF
Reference designs

TIDA-01358 — 24-V AC Power Stage With Wide Vin Converter and Battery Backup Reference Design for Smart Thermostat

The TIDA-01358 reference design provides a low BOM cost, high efficiency power stage solution for smart thermostats and other gateway building automation end equipment. This power stage takes a 24Vac input and produces a 5V and 3.3V output rail which can power additional point-of-load converters (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00044 — USB Li-Ion Battery Charger and Power-Path Management Reference Design

This reference design delivers up to 1000 mA of continuous current to the battery output when programmed with a resistor on the ISET pin and is programmed at the factory for ~540mA. The USB current limit modes are selected by the ISET2 pin and limits current to a maximum of 500 mA (logic high) or (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RGT) 16 View options

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