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Circuitos integrados de gestión de baterías
CI para cargador de batería

BQ25895M

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Cargador de batería reductor de I2C, 1 celda y 5 A con elevador de 3,1 A y HVDCP

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BQ25895M

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Detalles del producto

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 5 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 Vin (max) (V) 14 Absolute max Vin (max) (V) 22 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.84 Battery charge voltage (max) (V) 4.6 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 5 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 Vin (max) (V) 14 Absolute max Vin (max) (V) 22 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.84 Battery charge voltage (max) (V) 4.6 Control interface I2C Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • 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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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos 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 17/10/2022
Nota sobre la aplicación Extracting Maximum Power from an Adapter with Input Current Optimization Feature (Rev. C) 2/08/2019
Nota sobre la aplicación Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) 1/05/2018
Nota sobre la aplicación Battery Charger Overload Protection in Boost Mode Operation 12/07/2017
Nota sobre la aplicación Port Detection for Power Banks 8/04/2016
Nota sobre la aplicación Using the bq2589x ADC to Estimate Battery Temperature 4/05/2015
Analog Design Journal Extract maximum power from the supply when charging a battery 11/04/2014
Analog Design Journal Dynamic power management for faster, more efficient battery charging 28/10/2013

Diseño y desarrollo

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Placa de evaluación

BQ25895MEVM-664 — Módulo de evaluación de cargador completo bq25895M

El módulo de evaluación (EVM) bq25895M es un módulo completo de carga para evaluar el dispositivo altamente integrado de gestión de carga de batería conmutada y gestión de la ruta de potencia del sistema, diseñado para baterías de una celda de ion de litio y polímero de litio, en un amplio rango de (...)

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