MAX16806EVCMAXQU+ Maxim Integrated Products, MAX16806EVCMAXQU+ Datasheet - Page 3

• Manufacturer Part Number: MAX16806EVCMAXQU+
• Description: EVAL KIT FOR MAX16806
• Manufacturer: Maxim Integrated Products

Specifications of MAX16806EVCMAXQU+

• Current - Output / Channel: 350mA
• Outputs And Type: 1, Non-Isolated
• Features: Dimmable, Extra 5V Output
• Voltage - Input: 5.5 ~ 40V
• Utilized Ic / Part: MAX16806
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

3) Open all the pins of J1 to select 150mA LED current.
4) Place jumper J2 between pins 2-3 to enable U1.
5) Place jumper J3 between pins 2-3 to enable analog
6) Short the CFD jumper to disable current foldback.
7) Turn on the power supply and increase the input
8) Press the momentary switch (S1) to disable dim-
9) Press the momentary switch again to enable dim-
10) Increase the supply voltage to 16V and check
1) Visit
2) Install the MAX16806 evaluation software on the PC
3) Power up the MAX16806 EV kit by applying 10V to
4) Set both CMAXQUSB+ interface board SW1 switches
5) Connect the included USB cable from the PC to the
dimming.
voltage above 5.5V. The LED glows and the bright-
ness depends on the analog dimming input voltage
set by the trim pot (R3). If the LED is not glowing,
check by turning R3 in a counterclockwise direction
to increase analog dimming voltage.
ming and get full brightness. Measure the LED cur-
rent. It should be 150mA ±3%. Input current can be
used to measure LED current, as the input current
will be only 0.7% more than the LED current.
ming. Turn the trim pot (R3) fully in a counterclock-
wise direction to get full brightness. Measure the
LED current, which should be 150mA ±3%.
whether the LED current is stable at 150mA ±3%.
load the latest version of the EV kit software,
MAX16806EVSYS_GUI_setup.exe.
by running the MAX16806EVSYS_GUI_setup.exe.
The program files are copied and icons are created
in the Windows Start menu. Restart the computer
when prompted. For Windows 2000/XP, you may
need administrator privileges.
V
of CMAXQUSB+ board to the I
MAX16806 EV kit using the 3-wire connector included
(in correct direction). Function of each pin of the I
connector is indicated on both boards.
to the ON position. These components provide pullup
resistors for the SDA and SCL 2-wire bus signals.
CMAXQUSB+ interface board. The CMAXQUSB+
board is powered through the computer’s USB port.
A Building Driver Database window pops up in
addition to a New Hardware Found message. If
you do not see a window that is similar to the one
described above within 30 seconds, remove the
USB cable from the CMAXQUSB+ interface board
IN
. Leave TFIN open and connect the I
www.maxim-ic.com/evkitsoftware
Hardware and Software Configuration
_______________________________________________________________________________________
2
C interface of
2
C interface
to down-
2
MAX16806 Evaluation Kit/
C
6) Follow the directions of the Add New Hardware
7) Start the MAX16806 EV kit software by opening its
8) In the pulldown File menu, select Connect. The
See the Detailed Description of Software section in this
document for more information on the software GUI
features.
The MAX16806 EV kit demonstrates a high output-
current linear LED driver with accurate current control
based on the MAX16806 current regulator. This EV kit is
capable of supplying regulated output currents up to a
total of 350mA and operates at supply voltages
between 5.5V to 40V. Note: If the supply voltage is
above the total operating voltage of the LED string by
more than 7.5V, the maximum output current should be
set so the device does not enter into thermal shutdown
due to excessive power dissipation.
The MAX16806 uses a feedback loop to control the out-
put current. The differential voltage across the current-
sense resistors (R1 and R2) is compared with an internal
fixed reference and the error is used to control the output
drive. The voltage across the sense resistors is measured
differentially to achieve high immunity to common-mode
noise. The MAX16806 uses a factory-set reference of
198mV ±3% that is adjustable through the binning adjust-
ment register. See the Detailed Description of Software
section in this document for more information on access-
ing the binning adjustment register through I
Two-pin TFIN input provided on-board takes a
temperature-dependent voltage signal from the
MAX6613 temperature sensor, or an equivalent device
Detailed Description of Hardware
and reconnect it again. Administrator privileges are
required to install the USB device driver on
Windows 2000/XP.
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 as
C:\Program Files\MAX16806 by using the Browse
button. Refer to the TROUBLESHOOTING_USB.PDF
document included with the software if you have any
problems during this step.
icon in the Start menu.
MAX16806 software communicates with the
MAX16806 device and displays the contents of all
the dynamic registers in the corresponding pulldown
menu. The EV kit and the software are then ready for
evaluation. If a Connection failed message is dis-
played, check the USB and I
tions and whether the MAX16806 board is powered
up.
Evaluation System
2
C interface connec-
2
C interface.
3