MAX77786
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MAX77786

18.2VIN, 5.5A 1-Cell Li+ Battery Charger for USB Type-C Power Delivery

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Part Models 2
1ku List Price Starting From $1.65
Features
  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77786
    • Up to 3.5A Charging with MAX77785
    • 90% Buck Efficiency at 4A, 15V Input
    • Up to 5.5A Input Current Limit with AICL (MAX77786)
    • Up to 3.5A Input Current Limit with AICL (MAX77785)
  • +26V Absolute Maximum Input Voltage Rating
  • 4.7V to 18.2V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 10.805V
    • Up to 16.2W for MAX77786
    • Up to 10.8W for MAX77785
    • Dedicated Boost enable input
  • Integrated Battery True-Disconnect FET
    • RDSON = 7.7mΩ
    • Programmable Discharge Current Limit up to 10A
    • Shipping Mode and Low Battery Leakage Current
    • 1.3MHz Switching Frequency with 1μH Inductor
    • Disconnect Input (DISQBAT)
  • Safety
    • Battery Temperature Sensing and Charge Safety Timer
    • JEITA Guideline Compliant
    • Thermal Regulation and Thermal Shutdown
    • System Voltage OVLO/UVLO
  • USB Switch with BC1.2 Detection
  • Spread Spectrum for Noise-Sensitive Applications
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • Programmable Unplug Detection Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • I2C Interface
  • 2.96 mm x 2.96 mm WLP
Additional Details
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The MAX77785/MAX77786 is a high-performance high-input 3.5/5.5A fast charger with Smart Power Selector™. The ICs can operate as a reverse boost converter without an additional inductor, allowing the battery to share its power through the charging port, and offer programmable output voltage from 4.505V to 10.805V. The devices feature 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. The ICs feature true load disconnection in reverse boost mode and have an adjustable output current protection limit. The device is highly flexible and programmable through I2C configuration. Li-ion, Li-polymer, and LiFePO4 battery chemistries are supported. It can also provide fast programmable unplug detection of sources for dynamic system load management. To support a variety of legacy USBs as well as proprietary adapters, the device also integrates BC1.2 detection using the D+ and D- pins.

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 when 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.

Applications

  • Gaming Devices
  • VR Applications
  • mPOS
  • Tablet PCs

Smart Power Selector is a trademark of Maxim Integrated Products, Inc.

USB Type-C is a registered trademark of USB Implementers Forum, Inc.

Power Path is a trademark of Linear Technology Corporation.

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MAX77786

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UPDATED 02/28/2024
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MAX77785 / MAX77786 Data Sheet (Rev.0)

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Documentation

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
MAX77786EWJ+ 49-WLCSP-N/A
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MAX77786EWJ+T 49-WLCSP-N/A
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Software & Part Ecosystem

Software & Part Ecosystem

Parts Product Life Cycle Description
MAX77986
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RECOMMENDED FOR NEW DESIGNS

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

Evaluation Kit

Evaluation Kits 1

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MAX77786EVKIT#

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MAX77786EVKIT#

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MAX77786EVKIT#

Features and Benefits

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with the MAX77786
    • 90% Buck Efficiency at 4A, 15V Input
  • 4.7V to 18.2V Input Operating-Voltage Range
  • Reverse Boost with Programmable Output-Voltage Options up to 10.805V
  • Charge-Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • Dedicated Input for Suspend Mode (SUSPND)
  • USB Type-C Version 1.3- and PD 3.0-Compliant
  • Sink/Source/DRP Port Support
  • Programmable Power Supply (PPS) Sink Support
  • Fast Role-Swap Initial Sink Support
  • Integrated VCONN Switch with Overcurrent Protection (OCP)
  • Support Try.Snk State
  • Battery Charging 1.2 (BC1.2) Legacy Charger Detection
  • Programmable Unplug Detection
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Product Detail

The MAX77785/MAX77786 evaluation kits (EV kit) are fully assembled and tested printed circuit boards (PCB) that demonstrate the MAX77785/MAX77786 single-cell lithium-ion battery chargers.

The MAX77785/MAX77786 are for 1S Li+ battery applications and can operate with a 4.7V to 18.2V input voltage with a maximum charging current up to 3.5A/5.5A. The MAX77785/MAX77786 ICs offer a reverse boost as well as fully integrated low-power loss switches to provide small solution size and high efficiency. The EV kits demonstrate the performance of the MAX77785/MAX77786 charger and provide the convenience of evaluating full USB Type-C® power-delivery (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 on-the-go (OTG) mode.

A Micro-B USB cable is included in the EV kit to serve as the interface from a USB port on a Windows® PC to the subordinate I2C port on the MAX77785/MAX77786.

Resources

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XLSX

MAX77785EVKIT#/MAX77786EVKIT# Bill of Materials Download

19.19 K

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ZIP

MAX77785EVKIT#/MAX77786EVKIT# Gerber Files Download

1.43 M

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PDF

MAX77785EVKIT / MAX77786EVKIT User Guide (Rev.1) Download

2.61 M

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Software

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MAX77786EVKIT#/MAX77786EVKIT# Evaluation Board GUI Installer Download

4.5 M

Evaluation Kits1

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MAX77786EVKIT#

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