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Texas Instruments bq2597x 8A Battery Charger

Texas Instruments bq2597x 8A Battery Charger is a 97% efficient 8A 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. This feature reduces the losses over the charging cable and limits the temperature rise in the application. The dual-phase architecture reduces the input cap requirements and output voltage ripple. When used with a standard charger such as the Texas Instruments bq2589x, the system enables fast charging at the lowest power loss from pre-charge through CC, CV, and termination.

Features

  • 97% efficient power stage for 8A fast charge
  • Switched cap architecture optimized for 50% duty cycle
    • Input voltage is 2x battery voltage (3.5V to 4.65V)
    • Output current is 2x of input current (up to 4.5A)
    • 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 17V, 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
    • 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 6A with external RSENSE
    • ±1% BAT temperature
    • ±1% BUS temperature
    • ±4°C die temperature

Applications

  • Smartphone
  • Tablet PC

Simplified Applications

Application Circuit Diagram - Texas Instruments bq2597x 8A Battery Charger
Publicerad: 2018-06-26 | Uppdaterad: 2023-03-07