MAX77786

• 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 V_CONN Switch with Overcurrent Protection (OCP)
• Support Try.Snk State
• Battery Charging 1.2 (BC1.2) Legacy Charger Detection
• Programmable Unplug Detection

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.

• Fully integrated single-board solution for portable power and battery management
• USB-C Power Delivery (PD) input for flexible and modern power sourcing
• Single-cell (1S) Li-ion battery charger with optimized charge management
• Advanced fuel gauging, protection, and authentication for battery safety and reliability
• Multiple configurable output rails (up to 5) supporting diverse system loads
• Buck-boost and multi-phase buck regulation for efficient power conversion
• Supercapacitor-based backup power to maintain operation during power loss or battery swap
• Integrated power path management for seamless source switching
• Logic-level translation support for multi-voltage system compatibility
• Compact and scalable design suitable for space-constrained portable devices
• With MAXUSB_INTERFACE# for easy communication with a Windows PC

The ADPS40099-RD is a fully integrated battery management system reference design suitable for portable applications. It consolidates a complete power solution for handheld and portable devices, utilizing the latest components from ADI’s power portfolio.

The solution features the MAX77958 USB-C power delivery controller for flexible input options, paired with the MAX77786 1S battery charger to manage charging from a single-cell lithium-ion battery. The MAX17300 provides advanced fuel gauging, battery protection, and authentication capabilities, ensuring safe and reliable operation.

To support diverse power requirements, the design includes the MAX77857 buck-boost regulator and the MAX77542 multi-phase buck converter, enabling up to five individually configurable outputs. The design also integrates the MAX14727 for power path control. For backup power, the MAX38889 utilizes supercapacitor technology to maintain system operation during power interruptions and battery replacements. Additionally, the MAX14611 logic-level translator ensures seamless communication between components operating at different voltage levels.

This compact and cohesive single-board implementation offers a clear advantage in delivering a robust, space-efficient, and scalable battery management solution, ideal for modern portable electronic systems.