GENERAL DESCRIPTION

The TMP12 is a silicon-based airflow and temperature sensor designed to be placed in the same airstream as heat generating components that require cooling. Fan cooling may be required continuously, or during peak power demands, e.g. for a power supply, and if the cooling systems fails, system reliability and/or

safety may be impaired. By monitoring temperature while emulating a power IC, the TMP12 can provide a warning of cooling system failure.

FEATURES

Temperature Sensor Includes 100 ΩHeater

Heater Provides Power IC Emulation

Accuracy 63°C typ. from 240°C to 1100°C

Operation to 1150°C

5 mV/°C Internal Scale-Factor

Resistor Programmable Temperature Setpoints

20 mA Open-Collector Setpoint Outputs

Programmable Thermal Hysteresis

Internal 2.5 V Reference

Single 5 V Operation

400 µA Quiescent Current (Heater OFF)

Minimal External Components

APPLICATIONS

System Airflow Sensor

Equipment Over-Temperature Sensor

Over-Temperature Protection

Power Supply Thermal Sensor

Low-Cost Fan Controller