© 2013
PAGE 6
WTC3293
www.teamwavelength.com
WTC3293-00400-I
4-40 x 0.625”
nylon standoffs
(4 provided)
CONFIGURING THE EVALUATION BOARD
Figure 7
Assembling the WTC3243 Thermoelectric Controller to the WTC3293 Evaluation Board
STEP 3: INSTALL THE WTC3243 ON THE EVALUATION BOARD
Match up the notch on the WTC3243 with the silkscreen on the PCB.
Align the pins with the sockets, ensuring that all pins are lined up.
Press
fi
rmly to seat the WTC3243.
Make sure that none of the pins were bent during insertion before continuing.
For additional mechanical stability, install 2 4-40 x 3/8” screws from the bottom of the PCB into the
WTC3243 heat spreader. Choose opposite corners that will not interfere with fan mounting.
STEP 4: ATTACHING HEATSINK & FAN (optional for less than +5 V, 500 mA operation)
HEATSINK REQUIREMENTS.
The WTC3243 is designed to handle currents as high as 2.2 A. Refer
to the WTC3243 datasheet or the online SOA calculator (
http://www.teamwavelength.com/support/
calculator/soa/soatc.php
) to determine the Safe Operating Area and proper thermal solution for your
application. Attach a heatsink (such as WHS302 with thermal washer WTW002) to the WTC3243 when
driving currents higher than 500 mA. Attach a fan (such as WXC303 [+5 VDC] or WXC304 [+12 VDC])
to the heatsink for output currents exceeding 1.0 A. If using Wavelength accessories, refer to the
WHS302, WTW002, WXC303, and/or the WXC304 datasheets for assembly instructions.
FAN CONNECTIONS.
Connect the fan leads to the (+) and (-) fan power positions on Terminal Block 2
and secure with a small
fl
at head screwdriver. The fan connects to the V
DD
supply, not V
S
, so care must
be exercised to ensure that the proper fan is selected, 5 VDC or +12 VDC, when using dual
power supplies.