Toshiba Thermoflagger™ Over-Temperature ICs

Toshiba Thermoflagger™ Over-Temperature Detection ICs detect and protect against abnormal heat generation. Thermoflagger is designed to be connected in series with PTC Thermistors placed near heat sources. These ICs work by monitoring the resistance over the thermistors, which increases exponentially when over-temperature is observed. As a result, Thermoflagger will change output states and can be read by external systems, which can take appropriate actions. Various options include a 1µA or 10µA PTC current, latch type, push-pull, and open drain. The 1.6mm x 1.6mm ESV-packaged Thermoflagger ICs offer simple over-temperature protection with low current consumption and are suitable for notebook PCs, mobile equipment, home appliances, and industrial equipment for over-temperature detection.


  • Selectable PTCO output current
    • 1μA typical for TCTH01xxE
    • 10μA typical for TCTH02xxE
  • High ±8% PTCO output current accuracy at 3.3V, +25°C
  • Low current consumption
    • 1.8μA typical for TCTH01xxE
    • 11.3μA typical for TCTH02xxE
  • FLAG signal latch function (TCTH0x2xE)
  • FLAG signal output
    • Push-pull type for TCTH0xxAE
    • Open-drain type for TCTH0xxBE
  • Standard ESV (SOT-553) package, 1.6mm2 x 0.55mm in dimension


  • Notebook PCs
  • Mobile equipment
  • Home appliances
  • Industrial equipment


  • 1.7V to 5.5V operating supply voltage range
  • 0.36V to 0.64V detect voltage range
  • 0.1V typical hysteresis voltage
  • 1.5V typical UVLO voltage
  • 20μs typical operation MASK time
  • -40°C to +125°C operating temperature range


Typical Application Circuit

Application Circuit Diagram - Toshiba Thermoflagger™  Over-Temperature ICs

Block Diagrams

Block Diagram - Toshiba Thermoflagger™  Over-Temperature ICs
Gepubliceerd op: 2023-04-12 | Bijgewerkt op: 2023-09-26