MAX16825EVKIT+ Maxim Integrated Products, MAX16825EVKIT+ Datasheet - Page 3

• Manufacturer Part Number: MAX16825EVKIT+
• Description: KIT EVAL FOR MAX16825
• Manufacturer: Maxim Integrated Products

Specifications of MAX16825EVKIT+

• Current - Output / Channel: 100mA
• Outputs And Type: 3, Non-Isolated
• Voltage - Output: 26.3V
• Features: Graphic User Interface
• Voltage - Input: 6.5 ~ 28V
• Utilized Ic / Part: MAX16825
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10) Follow the directions of the Add New Hardware
11) Enable the power-supply output.
12) Start the EV kit software by opening its icon in the
13) Select the Output Enable checkbox and any of the
14) Verify that the corresponding attached LEDs are
The main window’s GUI (Figure 1) is simple to use. A
mouse or the keyboard’s tab key is used to navigate
through the controls. The correct SPI write operation is
generated to update the internal registers of the
MAX16825 when any of these controls are used.
Figure 1. MAX16825 Evaluation Kit Software—Graphical User
Interface (GUI)
Detailed Description of Software
described above after 30s, remove the USB cable
from the board and reconnect it. Administrator priv-
ileges are required to install the USB device driver
on Windows.
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX16825 (default installation
directory) using the Browse button. During device dri-
ver installation, Windows may show a warning mes-
sage indicating that the device driver Maxim uses does
not contain a digital signature. This is not an error con-
dition and it is safe to proceed with installation. Refer to
the TROUBLESHOOTING_USB.PDF document
included with the software for additional information.
Start | Programs menu. The MAX16825 EV kit soft-
ware main window appears, as shown in Figure 1.
Channel_ checkboxes.
illuminated.
_______________________________________________________________________________________
Graphical User Interface
MAX16825 Evaluation Kit
The software features a demo mode that is available by
selecting the View | Demo Mode menu item. When
operating in demo mode, all software communication to
the EV kit hardware is disabled and most of the soft-
ware’s GUI is functional. This feature enables the user
to evaluate the software without hardware connectivity.
The left-bottom status bar provides the USB-to-SPI
communication status. The right-bottom status bar pro-
vides the current program status. The MAX16825 EV kit
software configures the on-board SPI communication to
8kHz by default.
Upon starting the program, select the Output Enable
checkbox to enable the LED outputs. Deselecting the
Output Enable checkbox disables all three LED out-
puts. The Channel_ checkboxes enable and disable
individual channels.
The general-purpose 3-wire interface utility (Figure 2)
can also be used to communicate with the MAX16825
using low-level SPI commands. Select the Options |
Interface menu item and select the 3-wire interface tab
to access the utility. The utility configures the 3-wire ser-
ial-interface parameters, such as MSB position, CPOL,
CPHA, MOSI/MISO inverted logic, CS active state (high
or low), SPI clock (SCLK) speed, and custom selection
of SPI signal pins. The data to be sent is 8-bit data rep-
resented by a two-digit hexadecimal code. The code is
entered in the Data bytes to be written edit box and
transmitted by clicking on the Send Now button.
Problem: Software reports it cannot find the inter-
face circuit.
• Is power LED D1 lit?
• Is the USB cable connected to the PC and EV kit?
• Is power applied to the VIN PCB pad?
• Has Windows plug-and-play detected the board?
Bring up the Control Panel > System > Device
Manager, and look at what device nodes are indi-
cated for USB. If there is an unknown device node
attached to the USB, delete it. This process forces
plug-and-play to try again.
General-Purpose 3-Wire (SPI) Interface Utility
General Troubleshooting
Software Startup
3