Click here to ask about the production status of specific part numbers. Evaluates: MAX77975/MAX77976/ MAX77975/MAX77976 MAX77958 Evaluation Kits General Description Benefits and Features The MAX77975/MAX77976 evaluation kit (EV kit) is a High-Efficiency Single-Cell Switching Charger fully assembled and tested printed circuit board (PCB) Up to 5.5A Charging with MAX77976 that demonstrates the MAX77975/MAX77976 single-cell 91.2% Buck Efficiency at 4A, 12V Input lithium-ion battery charger. +28V Absolute Maximum Input Voltage Rating The MAX77975/MAX77976 is for 1S Li+ battery appli- 3.8V to 19V Input Operating Voltage Range cations and can operate with a 3.8V to 19V input volt- Reverse Boost with Programmable Output Voltage age with a maximum charging current of 3.5/5.5A. The Options Up to 12V MAX77975/MAX77976 offers a reverse boost as well as fully integrated low power loss switches to provide small Charge Status Output for LED solution size and high efficiency. The EV kit demonstrates Push-Button Input for Exiting from Ship Mode the performance of the MAX77975/MAX77976 charger External Discharge FET Enable Output and provides the convenience of evaluating full USB Type-C PD solutions with the MAX77958 USB Type-C Dedicated Input for Suspend Mode (SUSPND) PD controller. This combination allows fast charging of the USB Type-C Standalone Controller Support battery through the USB Type-C port as well as reverse Customizable Firmware powering the USB Type-C port with battery OTG mode. USB Type-C Version 1.3 and PD 3.0 Compliant A Micro-B USB cable is included in the package to serve Sink/Source/DRP Port Support as the interface from a USB port on a Windows PC to 2 PPS Sink Support the slave I C port on MAX77975/MAX77976. Windows - based graphical user interface (GUI) software provides Fast Role Swap Initial Sink Support a user-friendly interface to exercise the features of the Integrated V Switch with OCP CONN MAX77975/MAX77976. Support Try.Sink Support BC1.2 Legacy Charger Detection Ordering Information appears at end of data sheet. USB Type-C is a registered trademark of USB Implementers Forum. Windows is a registered trademark and registered service mark of Microsoft Corporation. 319-100597 Rev 1 11/20Evaluates: MAX77975/MAX77976/ MAX77975/MAX77976 Evaluation Kits MAX77958 Windows automatically updates the .NET framework Quick Start as needed. Follow this procedure to familiarize yourself with the EV 3) The EV kit software launches automatically after in- kit. stallation, or it can be launched by clicking on its icon Note: In the following sections, software-related items are in the Windows Start menu. identified by bolding. Text in bold refers to items directly 4) Make jumper connections based on the default con- from the EV kit software. Text in bold and underlined nection options in Table 1. Change it later when refers to items from the Windows operating system. evaluating more features. For the SW1 on the EV Required Equipment kit, set the switch location to the RIGHT so that the 2 MAX77975/MAX77976 I C lines are connected di- MAX77975/MAX77976 evaluation package rectly to the MAXUSB communication interface. Later MAX77975/MAX77976EVKIT Board you can switch it to the LEFT so that the MAX77975/ USB Micro-B cable 2 2 MAX77976 I C lines are connected to MAX77958 I C MAX77975/MAX77976 EV kit software (GUI) master. USB Type-C or PD travel adapter (TA) 5) Make connections to the EV kit board following guid- Power supply ance as shown in Figure 1. The two main inputs to Battery simulator apply are the battery and the charging adaptor. For quick start evaluation, it is suggested to use a 5V Multi-meters power supply at the CHGIN input and a battery volt- Windows-based PC age greater than 3.6V at the BATT input. The optional Oscilloscope to monitor CC pin or other signals voltmeter and ammeter location for testing charger ef- ficiency is indicated in Figure 1. When set up properly Procedure with both CHGIN = 5V and BATT = 3.8V input, the The EV kits are fully assembled and tested. Follow the SYS voltage is regulated above VBATT by default. steps below to install the EV kit software, make required hardware connections, and start operation of the kits. The 6) Connect the EV kit to a USB port on the PC using a USB Micro-B cable. EV kit software can be run without attached hardware. Note that after communication is established, the IC must still be 7) Open the GUI software, click Device > Connect. A configured correctly for the desired operation mode. Make window pops up showing that a slave address corre- sure the PC is connected to the internet throughout the pro- sponding to MAX77975/MAX77976 and/or MAX77958 cess so that the USB driver can be automatically installed. has been found. If not, check the connection. 1) Visit www.maximintegrated.com/products/MAX77975 8) Start evaluating the part with the GUI software. MAX77976 under the Design Resources tab to down- Unlock the write protection and adjust the char- load the latest version of the MAX77975/MAX77976 ger mode, the charging input current limit, and the EV kit GUI software. Save the software to a tempo- charging current to start evaluating the basic charger rary folder and unpack the zip file . features as described in the Configurations 0-13 Tabs section. Play with the charger mode and other 2) Install the EV kit software on your computer by run- register settings to evaluate the smart power path and ning the MAX77975 MAX77976GUISetupX.X.X.exe more features. Remove the CHGIN input and use the program inside the temporary folder. The program real travel adaptor to evaluate charging the battery files are copied, and icons are created in the Windows through the USB Type-C port. Start menu. The software requires the .NET Frame- work 4.5 or later. If you are connected to the Internet, Maxim Integrated 2 www.maximintegrated.com