Analog Devices / Maxim Integrated MAX77985/MAX77986 Evaluation Kits

Analog Devices MAX77985/MAX77986 Evaluation Kits demonstrate the MAX77985/MAX77986 single-cell lithium-ion battery chargers. The kits are fully assembled and tested printed circuit boards (PCBs). The MAX77985/MAX77986 are for 1S Li+ battery applications and operate with an input voltage of 4.7V to 19V with a maximum charging current of 3.5/5.5A. The ICs provide a reverse boost and fully integrated low-power loss switches, offering a small solution size and high efficiency.

The ADI MAX77985/MAX77986 evaluation kits conveniently evaluate complete USB Type-C® PD solutions with the MAX77958 USB PD controller. This combination enables fast battery charging through the USB Type-C port and reverses powering the USB Type-C port with battery OTG mode. A Micro-B USB cable is included to function 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 supplies a user-friendly interface to apply the features of the IC.


  • 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

Required Equipment

  • MAX77985/MAX77986 evaluation package
  • MAX77985/MAX77986EVKIT# board
  • USB micro-B cable
  • MAX77985/MAX77986 EV kit software (GUI)
  • USB Type-C or PD travel adapter (TA)
  • USB Type-C cable
  • Power supply
  • Battery simulator or real 1-cell Li-ion battery
  • Multi-meters
  • Windows-based PC
  • Oscilloscope to monitor CC pin or other signals

Board Connections

Block Diagram - Analog Devices / Maxim Integrated MAX77985/MAX77986 Evaluation Kits

PCB Layout

Location Circuit - Analog Devices / Maxim Integrated MAX77985/MAX77986 Evaluation Kits
Published: 2023-07-11 | Updated: 2023-08-03