Temperature sensor composed of TC650/TC651 and its application circuit
The figure shows a temperature sensor composed of TC650/TC651 and its application circuit diagram. The TC650/TC651 in this circuit is an integrated circuit with temperature sensor for brushless DC fan speed control. Main features of TC650/TC651: Control the fan speed according to the detected temperature to achieve reasonable heat dissipation. This not only reduces fan noise, extends fan life, but also saves energy; the temperature control range has been set in the device and is divided into multi-stage PWM control, so that the user does not need to set and peripheral resistor components, the circuit is simple and easy to use; Typical accuracy is ±1°C from 25°C to +70°C; low power consumption, typical quiescent current is 50μA; operating voltage range is 2.8~5.5V; internal over temperature alarm signal (Tover) output (level signal) ; Operating temperature -40 ° C ~ +125 ° C.
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