Constant temperature control circuit compose of the smart temperature sensor DS1620 with three-wire serial interface

Published:2011/5/8 22:38:00 Author:Christina | Keyword: Constant temperature, smart temperature sensor, three-wire serial interface | From:SeekIC

When you use the DS1620 to monitor the temperature of the microprocessor, you can change the chip's cooling condition by turn on or off the fan to achieve the temperature control, the circuit is as shown. The feature is: the TCOM signal gets through the 2N7000-type MOSFET to control the fan, when the chip's surface temperature is t>tH, the fan turns on until t<tL. The main parameters of the 2N7000 are: the drain-source breakdown voltage UDSO=60V, the rated on-state current IT=280mA, the maximum continuous output power PD=830mW. For the high power cooling fan, you can use the 2N7010-type MOSFET, it's IT=13A，PD=1.2W.



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