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BQ25996

ACTIVE

I2C, controlled, single-cell, 4:1, 16-A, switched capacitor parallel battery

Data sheet

BQ25996

ACTIVE
Data sheet

Product details

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 16.2 Features Input OVP, Integrated ADC Vin (min) (V) 6 Vin (max) (V) 22 Absolute max Vin (max) (V) 40 Control topology Flash Charger Battery charge voltage (min) (V) 3 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) 16.2 Features Input OVP, Integrated ADC Vin (min) (V) 6 Vin (max) (V) 22 Absolute max Vin (max) (V) 40 Control topology Flash Charger Battery charge voltage (min) (V) 3 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
  • 98.3% peak efficiency switched cap parallel charger supporting 1-cell battery and 16A fast charge
  • Switched cap architecture with selectable and bi-directional 4:1, 3:1, 2:1 and 1:1 conversion ratios
  • Provide gate drive signal for ACFET gate drive
  • Low Power Mode pin for <5µA standby bias current
  • Support wide range of input voltage

    • Up to 22V operational input voltage

    • Maximum 40V input voltage with optional external ACFET and 28V without external ACFET

  • Integrated programmable protection features for safe operation
    • Input over-voltage protections (VAC_OVP and VBUS_OVP) with external ACFET up to 40V
    • Battery over-voltage protection (VBAT_OVP)
    • Input over-current protection (IBUS_OCP)
    • Output over-voltage protection (VOUT_OVP) and over-current protection (IBAT_OCP)
    • Input under-current protection (IBUS_UCP) to detect adapter unplug and prevent boost-back
    • Input and output short-circuit protections (IBUS_RCP and IBUS_SCP)
    • Junction over-temperature protection (TDIE_FLT)
  • Programmable settings for system optimization
    • Interrupts and interrupt masks
    • ADC readings and configuration
  • Integrated 16-bit ADC for voltage, current and temperature monitoring
  • 98.3% peak efficiency switched cap parallel charger supporting 1-cell battery and 16A fast charge
  • Switched cap architecture with selectable and bi-directional 4:1, 3:1, 2:1 and 1:1 conversion ratios
  • Provide gate drive signal for ACFET gate drive
  • Low Power Mode pin for <5µA standby bias current
  • Support wide range of input voltage

    • Up to 22V operational input voltage

    • Maximum 40V input voltage with optional external ACFET and 28V without external ACFET

  • Integrated programmable protection features for safe operation
    • Input over-voltage protections (VAC_OVP and VBUS_OVP) with external ACFET up to 40V
    • Battery over-voltage protection (VBAT_OVP)
    • Input over-current protection (IBUS_OCP)
    • Output over-voltage protection (VOUT_OVP) and over-current protection (IBAT_OCP)
    • Input under-current protection (IBUS_UCP) to detect adapter unplug and prevent boost-back
    • Input and output short-circuit protections (IBUS_RCP and IBUS_SCP)
    • Junction over-temperature protection (TDIE_FLT)
  • Programmable settings for system optimization
    • Interrupts and interrupt masks
    • ADC readings and configuration
  • Integrated 16-bit ADC for voltage, current and temperature monitoring

The BQ25996 is a 98.3% peak efficiency, 16A battery charging solution using dual-phase switched cap architecture for 1-cell Li-ion battery. The switched cap architecture allows the cable current to be one quarter, one third, or one half of the charging current depending on converter mode and input voltage, reducing the cable power loss and limiting temperature rise. The dual-phase architecture increases charging efficiency and reduces the input and output cap requirements. When used with a main charger such as BQ25790, the system enables the fast charging at the very low power loss from pre-charge through constant current (CC), constant voltage (CV), and termination.

The BQ25996 also supports bypass mode charge through internal MOSFETs.

The device supports control and driver for external N-FETs or a single N-FET relative to a CMSRC regulation pin.

The BQ25996 is a 98.3% peak efficiency, 16A battery charging solution using dual-phase switched cap architecture for 1-cell Li-ion battery. The switched cap architecture allows the cable current to be one quarter, one third, or one half of the charging current depending on converter mode and input voltage, reducing the cable power loss and limiting temperature rise. The dual-phase architecture increases charging efficiency and reduces the input and output cap requirements. When used with a main charger such as BQ25790, the system enables the fast charging at the very low power loss from pre-charge through constant current (CC), constant voltage (CV), and termination.

The BQ25996 also supports bypass mode charge through internal MOSFETs.

The device supports control and driver for external N-FETs or a single N-FET relative to a CMSRC regulation pin.
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* Data sheet BQ25996 I2 C Controlled 1-Cell 16A Switched Cap Parallel Battery Charger datasheet PDF | HTML 10 Jun 2026

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