Remote Temperature-Measurement Circuit Composed Of Intelligent Remote Thermal Fan Controller ADT7460

Published:2011/7/14 10:10:00 Author:Robert | Keyword: Remote, Temperature-Measurement, Intelligent, Thermal, Fan, Controller | From:SeekIC

The remote temperature sensor is composed of ADT7460 with two transistors. As the transistor's emitter voltage is proportional to temperature, this feature could be used to measure the remote temperature. The remote temperature measurement circuit is shown in the picture. The CPU shown in the picture has the temperature-measurement transistor itself. It is equivalent to a 2N3906 PNP transistor. If using the discrete transistor, the collector polar can not be connected to ground and it should be connected to the base polar to be used as diode. If using the NPN transistor, it should connect the base polar to the D+ port, and connect the emitter polar to the D- port. If using the PNP transistor, it should connected the emitter polar to D+ port and connected the base polar to the D- polar. The picture shows the 2N3904 type NPN transistor and 2N3906 type PNP transistor's wiring mode.



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