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BQ24707
  • BQ24707
  • BQ24707

BQ24707

ACTIVE

SMBus 1-4 cell Buck battery charge controller with independent comparator and circuit protection

Texas Instruments BQ24707 Product Info

1 April 2026 3

Parameters

Rating

Catalog

Number of series cells

1, 2, 3, 4

Cell chemistry

Li-Ion/Li-Polymer

Charge current (max) (A)

8

Features

Input OVP, Power Path

Vin (min) (V)

4.5

Vin (max) (V)

24

Absolute max Vin (max) (V)

30

Control topology

Switch-Mode Buck

Battery charge voltage (min) (V)

1.024

Battery charge voltage (max) (V)

19.2

Control interface

SMBus

Operating temperature range (°C)

-40 to 85

Package

VQFN (RGR)-20-12.25 mm² 3.5 x 3.5

Features

  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-µA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners

  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615 kHz, 750 kHz, and 885 kHz Switching
    Frequency
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor, and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Output Accuracy
  • Programmable Adapter Detection and Indicator
  • Independent Comparator With Internal Reference
  • Integrated Soft-Start
  • Integrated Loop Compensation
  • AC Adapter Operating Range 5 V to 24 V
  • 15-µA Off-State Battery Discharge Current
  • 20-pin 3.5 mm × 3.5 mm QFN Package
  • bq24707: ACOK Delay Default 1.3 s
  • bq24707A: ACOK Delay Default 1.2 ms
  • APPLICATIONS
    • Portable Notebook Computers, UMPCs, Ultra-Thin
      Notebooks, and Netbooks
    • Personal Digital Assistants
    • Handheld Terminals
    • Industrial and Medical Equipment
    • Portable Equipment

All other trademarks are the property of their respective owners

Description

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.

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