器件名称: TMP12
功能描述: Airflow and Temperature Sensor
文件大小: 446.27KB 共14页
简 介:a
FEATURES Temperature Sensor Includes 100 Heater Heater Provides Power IC Emulation Accuracy 3°C typ. from 40°C to 100°C Operation to 150° 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 A 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
Airflow and Temperature Sensor TMP12*
FUNCTIONAL BLOCK DIAGRAM
HYSTERESIS CURRENT CURRENT MIRROR IHYS
VREF
V+
SET HIGH
WINDOW COMPARATOR
+ + -
OVER
SET LOW
VOLTAGE REFERENCE AND SENSOR 1k
UNDER
HYSTERESIS VOLTAGE
GND
PINOUTS DIP And SO
VREF
1 2 3 4 TOP VIEW (Not to Scale)
GENERAL DESCRIPTION
SET HIGH SET LOW GND
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. The TMP12 generates an internal voltage that is linearly proportional to Celsius (Centigrade) temperature, nominally 5 mV/°C. The linearized output is compared with vol……
