Using Thermoflagger™

Thermoflagger™ Configuration

Place PTC thermistors at locations where heat can be localized and connect them to Thermoflagger™.
When Thermoflagger™ detects abnormal heating, the PTCGOOD pin is driven Low.

Thermoflagger™ graph

When the temperature of a PTC thermistor exceeds its critical temperature,

  • Resistance of PTC thermistor increases dramatically.
  • Voltage of PTCO pin increases dramatically
    (= resistance of PTC thermistor x current of PTCO(constant))
  • the voltage at the PTCO pin exceeds a detection threshold.
  • the PTCGOOD pin is driven Low.

Basic of Thermoflagger™

The need for overheating (temperature) monitoring
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What is Thermoflagger™ ?
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Basic operations of Thermoflagger™
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Feature 1: Simplifies circuit design for overtemperature detection
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Feature 2: Low-cost solution for monitoring multiple locations for overtemperature conditions
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Feature 3: Supports failsafe design (1)
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Feature 3: Supports failsafe design (2)
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Application example for Thermoflagger™
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Application of Thermoflagger™ (reference design)
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Related information

Back to Basic of Thermoflagger™

* Thermoflagger™ is a trademark of Toshiba Electronic Devices & Storage Corporation.
* Other company names, product names, and service names may be trademarks of their respective companies.

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