Toshiba Electronics Europe has significantly extended its range of Thermoflagger overtemperature detection ICs with the release of six further devices, bringing the total to eight. The new devices, in combination with thermistors that have a positive thermal coefficient (PTC), are intended to detect temperature increases in electronic devices.
With safety paramount in many applications, the new Thermoflagger overtemperature detection ICs monitor internal temperatures to ensure that systems are working as intended, thereby ensuring safety. Typical applications include mobile devices, home appliances, industrial equipment and many others.
Expanding the range of Thermoflagger devices to eight, the new devices (TCTH011AE, TCTH012AE, TCTH021AE, TCTH022AE, TCTH011BE and TCTH012BE) complement the previously released TCTH021BE and TCTH022BE, adding another PTCO output current (IPTCO) of 1 µA. A useful FLAG signal (PTCGOOD) is available as either push-pull or open-drain along with the option to have the FLAG signal latching (or not).
Devices in the TCTH0xxxE series can identify temperature rises by detecting a change in resistance value due to temperature within a PTC. By connecting PTC thermistors in series, temperature can be monitored at several points.
The new products are capable of operating in an ambient temperature between –40 °C and +125 °C. They operate from a supply voltage (VDD) in the range of 1.7 V to 5.5 V and feature low current consumption as low as 1.8 μA (typ.). They are housed in a small, industry-standard SOT-553 (ESV) package measuring just 1.6 mm × 1.6 mm × 0.55 mm.
To support designers using these ICs, Toshiba released a new reference design featuring the Thermoflagger devices.