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Circuitos integrados de gestión de baterías
CI para cargador de batería

BQ25970

ACTIVO

Cargador de batería de I2C de 1 celda, 8 A, con tapas conmutadas para aplicaciones de carga en paral

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BQ25970

ACTIVO
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Detalles del producto

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 8 Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated ADC Vin (min) (V) 3.2 Vin (max) (V) 12 Absolute max Vin (max) (V) 20 Control topology Flash Charger Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 8 Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated ADC Vin (min) (V) 3.2 Vin (max) (V) 12 Absolute max Vin (max) (V) 20 Control topology Flash Charger Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
DSBGA (YFF) 56 10.7999999999999988 mm² (— mm × — mm)
  • 97% Efficient power stage for 8-A fast charge
  • Patent pending switched cap charger architecture optimized for 50% duty cycle
    • Input voltage is 2x battery voltage (3.5 V to 4.65 V)
    • Output current is 2x of input current (up to
      4.5 A)
    • Reduces power loss across the cable
  • Integrated programmable protection features for safe operation
    • Input over-voltage protection (BUS_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)
    • Battery over-voltage protection (BAT_OVP) with adjustable alarm
    • Output over-voltage (VOUT_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • IBAT over-current protection (BAT_OCP) with adjustable alarm
    • Switching MOSFET cycle by cycle current limit
    • Battery temperature monitoring
    • Connector Temperature Monitoring
  • Programmable settings for system optimization
    • Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)
    • STAT, FLAG, and MASK options for interrupts
    • ADC Readings and configuration
  • Integrated 12-bit effective analog-to digital converter (ADC)
    • ±0.5% BUS Voltage
    • ±0.5% VOUT Voltage
    • –0.4% to 0.2% BAT Voltage with differential sensing
    • ±1.5% BAT Current at 6 A with external RSENSE
    • ±1% BAT Temperature
    • ±1% BUS Temperature
    • ±4°C Die temperature
  • 97% Efficient power stage for 8-A fast charge
  • Patent pending switched cap charger architecture optimized for 50% duty cycle
    • Input voltage is 2x battery voltage (3.5 V to 4.65 V)
    • Output current is 2x of input current (up to
      4.5 A)
    • Reduces power loss across the cable
  • Integrated programmable protection features for safe operation
    • Input over-voltage protection (BUS_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)
    • Battery over-voltage protection (BAT_OVP) with adjustable alarm
    • Output over-voltage (VOUT_OVP)
    • Input over-current protection (BUS_OCP) with adjustable alarm
    • IBAT over-current protection (BAT_OCP) with adjustable alarm
    • Switching MOSFET cycle by cycle current limit
    • Battery temperature monitoring
    • Connector Temperature Monitoring
  • Programmable settings for system optimization
    • Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)
    • STAT, FLAG, and MASK options for interrupts
    • ADC Readings and configuration
  • Integrated 12-bit effective analog-to digital converter (ADC)
    • ±0.5% BUS Voltage
    • ±0.5% VOUT Voltage
    • –0.4% to 0.2% BAT Voltage with differential sensing
    • ±1.5% BAT Current at 6 A with external RSENSE
    • ±1% BAT Temperature
    • ±1% BUS Temperature
    • ±4°C Die temperature

The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.

The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.

The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature.

The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.

The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.

The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.

The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature.

The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.

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Más información y disponibilidad de la muestra

  • La hoja de datos completa y otra información están disponibles. Solicitar ahora
  • Si desea considerar un estándar universal compatible, hasta 20V puerto USB Type-C PD para alimentar el cargador, tenga en cuenta TPS25750

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BQ25968 ACTIVO Cargador rápido de 6 A con tapa conmutada, ADC de alta eficiencia de celda única controlado por I2C Same footprint with 6-A charging current.
Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
BQ25960 ACTIVO Cargador de batería paralelo con tapa conmutada de 8 A de 1 celdas y control I2C con selector de der Small footprint with same performance

Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos BQ25970, BQ25971 I2C Controlled Single Cell High Efficiency 8-A Switched Cap Fast Chargers With ADC datasheet (Rev. B) PDF | HTML 20/04/2020
Nota sobre la aplicación How to use the BQ25970 for Flash Charging (Rev. A) PDF | HTML 20/10/2022

Diseño y desarrollo

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Diseño de referencia

TIDA-01582 — Diseño de referencia de carga rápida y tapa conmutada para fuente de alimentación programable de ent

El objetivo de este diseño de referencia es mostrar el rendimiento total del sistema cuando se utiliza la topología de carga rápida de condensador conmutado en una aplicación de teléfono inteligente. El sistema incluye el uso de un adaptador de pared inteligente compatible con las especificaciones (...)
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