Toshiba Announces Thermoflagger
Toshiba has launched
the first two products in its Thermoflagger over-temperature detection IC series: “TCTH021BE,” which does not have a latching function for the
FLAG signal when it detects abnormal states; and “TCTH022BE” which does have a latching function. They detect
temperature rises inside electronic equipment in a simple circuit configuration
with positive temperature coefficient (PTC) thermistors.
For electronic equipment to perform as specified, their
semiconductors and electronic components must operate within design parameters.
Temperature is one crucial parameter, especially if the internal temperature
becomes higher than that assumed during the design process. This can be a major
problem in respect of safety and reliability, and requires an overheating
monitoring solution to detect any rise in temperature.
The new Thermoflagger ICs are used in combination with PTC
thermistors that change their resistance values according to the temperature.
They detect changes in the resistance value of a PTC thermistor placed close to
heat sources, and output FLAG signals to indicate over-temperature. Connecting
PTC thermistors in series realizes over-temperature detection for multiple
locations.
The new ICs are housed in the small, standard SOT-553 package
(Toshiba’s package name: ESV) and feature a low current consumption of 11.3μA
(typ.).
A reference design "Over Temperature Detection IC
Thermoflagger Application Circuit" using the new ICs is available now.
Thermoflagger ICs allow users to configure over-temperature
detection for an entire electronic product easily, and help to reduce its size
and power consumption. Toshiba will continue to develop Thermoflagger™ ICs with
various functions.
Leave A Comment