MAX77986

RECOMMENDED FOR NEW DESIGNS

19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD

Industry's Highest-Efficiency Buck Charger for USB Type-C Power Delivery Applications

Data Sheet (Rev. 2) Product Selection Table
Part Models
5
1ku List Price
Starting From $2.36
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Part Details

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77986
    • Up to 3.5A Charging with MAX77985
    • 92% Buck Efficiency at 4A, 12V Input
    • 92% Charging Efficiency at 3.5A, 9V Input
    • Optimized for High Voltage Input Operation
    • Accelerate Charge Time by Monitoring Kelvin Sensing Battery Voltage
    • Up to 5.5A Input Current Limit with AICL (MAX77986)
    • Up to 3.5A Input Current Limit with AICL (MAX77985)
  • +28V Absolute Maximum Input Voltage Rating
  • 4.7V to 19V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 12V
    • Up to 18W for MAX77986
    • Up to 12W for MAX77985
  • Safety
    • Battery Temperature Sensing and Charge Safety Timer
    • JEITA Guideline Compliant
    • Thermal Regulation and Thermal Shutdown
    • System Voltage OVLO/UVLO
  • Integrated Battery True-Disconnect FET
    • RDSON = 7.7mΩ
    • Programmable Discharge Current Limit up to 10A
    • Support Shipping Mode and Low Battery Leakage Current
    • 1.3MHz/2.6MHz Switching Frequency with 1μH/0.47μH Inductor
    • Disconnect Input (DISQBAT)
  • Spread Spectrum for Noise Sensitive Applications
  • Programmable Unplug Detection for 9V and 15V Sources
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • External Discharge FET Enable Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • I2C Interface
  • 4mm x 4mm FC2QFN
MAX77986
19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD
MAX77985/MAX77986 Block Diagram
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Documentation

Data Sheet 1

Technical Articles 2

Spec Notice 1

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Tools & Simulations

Software Development 7

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
EVAL-MAX77985-77986

MAX77985/MAX77986 Evaluation Kits

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Features and Benefits

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77986
    • 92% Buck Efficiency at 4A, 12V Input
  • +28V Absolute Maximum Input Voltage Rating
  • 4.7V to 19V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 12V
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • External Discharge FET Enable Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • Spread Spectrum for Noise Sensitive Applications
  • Programmable Unplug Detection for 9V and 15V Source
  • USB Type-C Standalone Controller Support Customizable Firmware
  • USB Type-C Version 1.3 and PD 3.0 Compliant
  • Sink/Source/DRP Port Support
  • PPS Sink Support
  • Fast Role Swap Initial Sink Support
  • Integrated VCONN Switch with OCP
  • Support Try.Snk
  • Support BC1.2 Legacy Charger Detection

Product Details

The MAX77985/MAX77986 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77985A/MAX77985B/MAX77986A/ MAX77986B single-cell lithium-ion battery charger.

The MAX7798XX series of IC is for 1S Li+ battery applications and can operate with a 4.7V to 19V input voltage with a maximum charging current of 3.5/5.5A. The IC offers a reverse boost as well as fully integrated low power loss switches to provide a small solution size and high efficiency. The EV kit demonstrates the performance of the IC and provides the convenience of evaluating full USB Type-C® PD solutions with the MAX77958 USB Type-C PD controller. This combination allows fast charging of the battery through the USB Type-C port as well as reverse powering the USB Type-C port with battery OTG mode.

A Micro-B USB cable is included in the package to serve as the interface from a USB port on a Windows PC to the slave I2C port on the IC. Windows®-based graphical user interface (GUI) software provides a user-friendly interface to exercise the features of the IC.
EVAL-MAX77985-77986
MAX77985/MAX77986 Evaluation Kits
MAX77985-MAX77986 EVKIT Board Photo Angle MAX77985-MAX77986 EVKIT Board Photo Top MAX77985-MAX77986 EVKIT Board Photo Bottom

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