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BQ25895M

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I2C 1cell 5A buck battery charger with 3.1-A boost and HVDCP

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Data sheet

BQ25895M

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 5 Vin (max) (V) 14 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.84 Battery charge voltage (max) (V) 4.6 Absolute max Vin (max) (V) 22 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB D+/D-/BC1.2 integrated, USB OTG integrated Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 5 Vin (max) (V) 14 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.84 Battery charge voltage (max) (V) 4.6 Absolute max Vin (max) (V) 22 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB D+/D-/BC1.2 integrated, USB OTG integrated Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4
  • High efficiency 1.5-MHz switch mode buck charge
    • 93% charge efficiency at 2 A and 91% charge efficiency at 3 A charge current
    • Optimize for high voltage input (9 V / 12 V)
    • Low power PFM mode for light load operations
  • Boost mode operation with adjustable output from 4.5 V to 5.5 V
    • Selectable 500-KHz / 1.5-MHz boost converter with up-to 3.1 A output
    • 93% Boost efficiency at 5 V at 1 A output
    • Support down-to 2.5V battery
    • Support PWM only or PFM/PWM control for light load efficiency
  • Integrated control to switch between charge and boost mode
  • Single input to support USB input and adjustable high voltage adapters
    • Support 3.9-V to 14-V input voltage range
    • Input current limit (100 mA to 3.25 A with 50-mA resolution) to support USB2.0, USB3.0 standard and high voltage adapters
    • Maximum power tracking by input voltage limit up-to 14V for wide range of adapters
    • Auto detect USB SDP, CDP, DCP, and non-standard adapters
  • Input current optimizer (ICO) to maximize input power without overloading adapters
  • Resistance compensation (IRCOMP) from charger output to cell terminal
  • Highest battery discharge efficiency with 11-mΩ battery discharge MOSFET up to 9 A
  • Integrated ADC for system monitor (voltage, temperature, charge current)
  • BATFET Control to support ship mode, wake up, and full system reset
  • Flexible autonomous and I2C mode for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • 12-µA Low battery leakage current to support ship mode
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% Charge current regulation
    • ±7.5% Input current regulation
  • Safety
    • Battery temperature sensing for charge and boost mode
    • Thermal regulation and thermal shutdown
  • High efficiency 1.5-MHz switch mode buck charge
    • 93% charge efficiency at 2 A and 91% charge efficiency at 3 A charge current
    • Optimize for high voltage input (9 V / 12 V)
    • Low power PFM mode for light load operations
  • Boost mode operation with adjustable output from 4.5 V to 5.5 V
    • Selectable 500-KHz / 1.5-MHz boost converter with up-to 3.1 A output
    • 93% Boost efficiency at 5 V at 1 A output
    • Support down-to 2.5V battery
    • Support PWM only or PFM/PWM control for light load efficiency
  • Integrated control to switch between charge and boost mode
  • Single input to support USB input and adjustable high voltage adapters
    • Support 3.9-V to 14-V input voltage range
    • Input current limit (100 mA to 3.25 A with 50-mA resolution) to support USB2.0, USB3.0 standard and high voltage adapters
    • Maximum power tracking by input voltage limit up-to 14V for wide range of adapters
    • Auto detect USB SDP, CDP, DCP, and non-standard adapters
  • Input current optimizer (ICO) to maximize input power without overloading adapters
  • Resistance compensation (IRCOMP) from charger output to cell terminal
  • Highest battery discharge efficiency with 11-mΩ battery discharge MOSFET up to 9 A
  • Integrated ADC for system monitor (voltage, temperature, charge current)
  • BATFET Control to support ship mode, wake up, and full system reset
  • Flexible autonomous and I2C mode for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • 12-µA Low battery leakage current to support ship mode
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% Charge current regulation
    • ±7.5% Input current regulation
  • Safety
    • Battery temperature sensing for charge and boost mode
    • Thermal regulation and thermal shutdown

The BQ25895M is a highly-integrated 5-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The devices support high input voltage fast charging. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C Serial interface with charging and system settings makes the device a truly flexible solution.

The BQ25895M is a highly-integrated 5-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The devices support high input voltage fast charging. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C Serial interface with charging and system settings makes the device a truly flexible solution.
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Technical documentation

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Type Title Date
* Data sheet BQ25895M I2C Controlled Single Cell Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage 3.1 A Boost Operation datasheet (Rev. C) PDF | HTML 17 Oct 2022
Application note Extracting Maximum Power from an Adapter with Input Current Optimization Feature (Rev. C) 02 Aug 2019
Application note Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 01 May 2018
Application note Battery Charger Overload Protection in Boost Mode Operation 12 Jul 2017
Application note Port Detection for Power Banks 08 Apr 2016
EVM User's guide bq25890/892/895/895M EVM (PWR664) User's Guide (Rev. B) PDF | HTML 24 Nov 2015
Application note Using the bq2589x ADC to Estimate Battery Temperature 04 May 2015
Analog Design Journal Extract maximum power from the supply when charging a battery 11 Apr 2014
Analog Design Journal Dynamic power management for faster, more efficient battery charging 28 Oct 2013

Design & development

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Evaluation board

BQ25895MEVM-664 — bq25895M Complete Charger Evaluation Module

The bq25895M evaluation module (EVM) is a complete charger module for evaluating the highly-integrated switch-mode battery charge management and system power path management device for 1 cell Li-Ion and Li-polymer battery in a wide range of smartphone and tablet applications.

User guide: PDF | HTML
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WQFN (RTW) 24 Ultra Librarian
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