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BQ25672

ACTIVE

I²C controlled, 1- to 4-cell, 3-A buck battery charger with dual-input selector and integrated ADC

Product details

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 3 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3 Battery charge voltage (max) (V) 18.8 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, Solar input/MPPT, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 6 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 3 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3 Battery charge voltage (max) (V) 18.8 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, Solar input/MPPT, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 6 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN-HR (RQM) 29 16 mm² 4 x 4
  • High power density, high integration buck charger for 1-4 cell batteries
    • Integrates switching MOSFETs, BATFET
    • Integrates input and charging current sensing
  • Highly efficient
    • 750-kHz or 1.5-MHz switching frequencies
    • 3-A charging current with 10-mA resolution
      • 96.5% efficient: 16-V battery at 3A from 20V
  • Supports a wide range of input sources
    • Autonomously sampled open circuit voltage (V OC) maximum power point tracking (MPPT) for charging from a photovoltaic panel
    • 3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum rating
    • Maximum power tracking with input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 A
    • Detects USB BC1.2, HVDCP and non-standard adapters
  • Dual-input power mux controller (optional) for source selection
  • Narrow voltage DC (NVDC) power path
  • Powers USB port from battery (USB OTG)
    • 5-V to 12-V OTG buck-boost output voltage with 10-mV resolution
    • OTG output current regulation up to 2 A with 40-mA resolution
  • Flexible autonomous and I 2C mode for optimal system performance
  • Integrated 16-bit ADC for voltage, current, and temperature monitoring
  • Low battery quiescent current
    • 17 µA for battery only operation
    • 500 nA in Charger Shutdown Mode
  • High accuracy
    • -0.25% to +0.65% charge voltage regulation for 2S batteries
    • ±5% charge current regulation
    • ±5% input current regulation
  • Safety
    • Thermal regulation and thermal shutdown
    • Input/battery OVP and OCP
    • Converter MOSFETs OCP
    • Charging safety timer
  • Package
    • 29-Pin 4 mm × 4 mm QFN
  • High power density, high integration buck charger for 1-4 cell batteries
    • Integrates switching MOSFETs, BATFET
    • Integrates input and charging current sensing
  • Highly efficient
    • 750-kHz or 1.5-MHz switching frequencies
    • 3-A charging current with 10-mA resolution
      • 96.5% efficient: 16-V battery at 3A from 20V
  • Supports a wide range of input sources
    • Autonomously sampled open circuit voltage (V OC) maximum power point tracking (MPPT) for charging from a photovoltaic panel
    • 3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum rating
    • Maximum power tracking with input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 A
    • Detects USB BC1.2, HVDCP and non-standard adapters
  • Dual-input power mux controller (optional) for source selection
  • Narrow voltage DC (NVDC) power path
  • Powers USB port from battery (USB OTG)
    • 5-V to 12-V OTG buck-boost output voltage with 10-mV resolution
    • OTG output current regulation up to 2 A with 40-mA resolution
  • Flexible autonomous and I 2C mode for optimal system performance
  • Integrated 16-bit ADC for voltage, current, and temperature monitoring
  • Low battery quiescent current
    • 17 µA for battery only operation
    • 500 nA in Charger Shutdown Mode
  • High accuracy
    • -0.25% to +0.65% charge voltage regulation for 2S batteries
    • ±5% charge current regulation
    • ±5% input current regulation
  • Safety
    • Thermal regulation and thermal shutdown
    • Input/battery OVP and OCP
    • Converter MOSFETs OCP
    • Charging safety timer
  • Package
    • 29-Pin 4 mm × 4 mm QFN

The BQ25672 is a fully integrated switch-mode buck charger for 1-4 cell Li-ion batteries and Li-polymer batteries. The BQ25672 is also capable of producing a buck-boost, 5 V to 12 V, output voltage on VBUS when operating in OTG Mode. The integration includes the switching MOSFETs, input and charging current sensing circuits, the battery FET and all the loop compensation of the converter. It uses NVDC power path management, regulating the system not dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source. also maximizes power from photovoltaic panels using its built-in V OC scaling MPPT algorithm.

The BQ25672 is a fully integrated switch-mode buck charger for 1-4 cell Li-ion batteries and Li-polymer batteries. The BQ25672 is also capable of producing a buck-boost, 5 V to 12 V, output voltage on VBUS when operating in OTG Mode. The integration includes the switching MOSFETs, input and charging current sensing circuits, the battery FET and all the loop compensation of the converter. It uses NVDC power path management, regulating the system not dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source. also maximizes power from photovoltaic panels using its built-in V OC scaling MPPT algorithm.

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BQ25792 ACTIVE I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output This product is 5-A, 1-S to 4-S I2C buck-boost switching charger with autonomous charging and integrated FETs

Technical documentation

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* Data sheet BQ25672 I2C Controlled, 1- to 4-Cell, 3-A Buck Battery Charger with Dual-Input Selector, MPPT for Solar Panels and Integrated ADC datasheet (Rev. B) PDF | HTML 26 Jul 2023
Application note Increasing NVCD Battery Chargers' Discharge Current PDF | HTML 10 Jan 2024
Application note State of Charge Estimation Using Smart Battery Charger PDF | HTML 11 Oct 2021
User guide BQ25672 Evaluation Module (Rev. A) PDF | HTML 01 Oct 2021
Certificate BQ25672EVM EU RoHS Declaration of Conformity (DoC) 28 Dec 2020

Design & development

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Evaluation board

BQ25672EVM — BQ25672 evaluation module for I²C controlled, 1-4-cell, 3-A buck charger with dual input and MPPT

The BQ25672EVM evaluation module (EVM) is used to evaluate the BQ25672 device. The BQ25672 is an integrated switched-mode buck battery charge management device in HOTROD (QFN) package, intended for 1-series to 4-series cell Li-ion and Li-polymer batteries from 6-V to 24-V input with programmable (...)
User guide: PDF | HTML
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Application software & framework

TI-CHARGER-GUI — GUI software for use with USB2ANY & battery charging evaluation modules

The TI-CHARGER-GUI offers a web-based or standalone graphical user interface to assist in the process of evaluating, designing with, configuring or testing battery charger products. The software provides full access to registers and an easy interface to send and sequence commands.
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VQFN-HR (RQM) 29 View options

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