Toshiba Unveils ThermoFlaggerTM Series for Advanced Over-Temperature Detection

Toshiba Electronic Components & Storage Device Corporation ("Toshiba") has announced today the release of two new products in its ThermoFlaggerTM series. The first product, "TCTH021BE," provides a FLAG signal without latch function when an abnormal condition is detected. The second product, "TCTH022BE," features a FLAG signal with latch function. These products utilize positive temperature coefficient (PTC) thermistor to detect temperature rise within electronic devices through a simple circuit configuration. Bulk shipments of these products start today.

In order to ensure proper operation of electronic devices, their semiconductor and electronic components must operate within specified design parameters. Temperature is a critical parameter, especially when the internal temperature exceeds the assumed temperature during design. This can pose a significant issue in terms of safety and reliability, necessitating an over-temperature monitoring solution to detect any temperature rise.

The new ThermoFlaggerTM ICs, in combination with PTC thermistors, allow monitoring through resistance changes based on temperature. They can detect changes in resistance of PTC thermistors placed near heat sources and output FLAG signals to indicate over-temperature conditions. Series-connected PTC thermistors enable over-temperature detection at multiple locations.

The new ICs come in a compact standard SOT-553 package (Toshiba's package name: ESV) and have low current consumption, as low as 11.3μA (typical value).

A reference design, "Application Circuit for Over-Temperature Detection IC Thermoflagger™," featuring the use of the new IC, has been released.

ThermoFlaggerTM ICs allow users to easily configure an over-temperature detection system for the entire electronic product, facilitating improvements in size and power consumption. Toshiba will continue to develop ThermoflaggerTM ICs with various functionalities.