HTC4000 TEMPERA
TURE CONTROLLER
www.teamwavelength.com
© 2012
HTC4000-62400-B
PAGE 5
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0 11.0 12.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Voltage Drop (V+ - V
LOAD
)
Current (A)
Caution:
Do not exceed the Safe Operating Area (SOA). Exceeding the SOA voids the warranty.
An online tool for calculating Safe Operating Area is available at:
http://www.teamwavelength.com/support/calculator/soa/soatc.php .
To determine if the operating parameters fall within the SOA of the device, the maximum voltage drop across the
controller and the maximum current must be plotted on the SOA curves.
These values are used for the example SOA determination:
V+
= 12 volts
V
LOAD
= 5 volts
I
LOAD
= 3.5 amp
Follow these steps:
1. Determine the maximum voltage drop across the controller, V+ - V
LOAD
, and mark on the X axis.
(12 volts - 5 volts = 7 volts, Point A)
2. Determine the maximum current, I
LOAD
, through the controller and mark on the Y axis:
(3.5 amp, Point B)
3. Draw a horizontal line through Point B across the chart. (Line BB)
4. Draw a vertical line from Point A to the maximum current line indicated by Line BB.
5. Mark V+ on the X axis. (Point C)
6. Draw the Load Line from where the vertical line from point A intersects Line BB down to Point C.
This chart assumes you have appropriate heatsinking on the HTC.
25 C Ambient
50 C Case Maximum
These values are determined from the specifications of the TEC
}
HTC Safe Operating Area
A
C
BB
B
SAFE OPERATING AREA & HEATSINK REQUIREMENTS
