MAX77986
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MAX77986

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

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

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
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Part Models 6
1ku List Price Starting From $2.36
Features
  • 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
Additional Details
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The MAX77985/MAX77986 is a high-performance high input range 3.5/5.5A fast charger with Smart Power SelectorTM. The IC can operate as a reverse boost without an additional inductor, allowing the battery to share its power through the charging port with voltage programmable from 5V to 12V. The device features fully integrated low-loss power switches to provide a small solution size and high efficiency, even at high input voltage and high charging current. Its high switching frequency allows the use of a smaller sized inductor. Li-ion, Li-polymer, and LiFePO4 battery chemistries are supported. The IC is compatible with USB Power Delivery sources with input current capability up to 5A. It can also provide fast unplug detection of 5V, 9V, and 15V sources for dynamic management of system load. The IC also helps mitigate EMI with the spread spectrum feature. The IC features true load disconnection in reverse boost mode and has an adjustable output current protection limit. The device is highly flexible and programmable through I2C configuration.

The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully as soon as an input source is available, even when the battery is deeply discharged (dead battery) or missing. It can be configured so that when power is applied to the charger input, the battery charging can automatically start.

Note: For parts with chip revision 0b001 (PASS1), contact Analog Devices for Rev 0 of the data sheet. This information can be read from the CHIP_REVISION (0x01) register.

APPLICATIONS

  • Gaming Devices
  • VR Applications
  • mPOS
  • Tablet PCs
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file View Data Sheet (Rev.2)
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Part Models 6
1ku List Price Starting From $2.36
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MAX77986

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Data Sheet

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UPDATED 11/28/2023
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MAX77985/MAX77986 19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD Data Sheet (Rev.2)

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Spec Notice

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UPDATED 06/29/2023
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MAX77975/MAX77976 to MAX77985/MAX77986 Migration Guide (Rev.0) redirect icon

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UPDATED 07/09/2024
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Enabling Automation in Logistics and Retail - Part 1 redirect icon

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UPDATED 08/15/2023
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How Parallel Battery Charging with USB-C Helps to Enhance the Consumer Experience redirect icon

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UPDATED 08/15/2023
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利用USB-C实现并联电池充电如何帮助提升用户体验 redirect icon

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UPDATED 08/15/2023
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USB Type-Cによる並列バッテリ充電、この手法は消費者に何をもたらすのか？ redirect icon

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Oct 25, 2023

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Software & Part Ecosystem

Evaluation Kits 1

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EVAL-MAX77985-77986

MAX77985/MAX77986 Evaluation Kits

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EVAL-MAX77985-77986

MAX77985/MAX77986 Evaluation Kits

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EVAL-MAX77985-77986
MAX77985/MAX77986 Evaluation Kits

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
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Product Detail

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.

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MAX77985-MAX77986 EVKIT ODB Files Download

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MAX77985/MAX77986 Evaluation Kits

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