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Constant Current
Figure 18 shows a standard PTC in a
constant current circuit. If the applied voltage (Vapp)
varies, the resistance of the PTC will change to compensate
for this variation, resulting in nearly constant current
through the load.
Temperature Compensation and Measurement
RTI Electronics PTC's are generally
designed to exhibit sharp increases in resistance at and
above the switch temperature. However, PTC's with nearly
linear resistance-temperature characteristics are available
for temperature compensation and temperature measurement
applications. If your application requires such a device,
please contact RTI Electronics's Applications Engineering
Department. RTI Electronics engineers have many years of
experience in solving complex temperature compensation and
measurement problems.
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