POWER TRANSISTOR CONSTRUCTION [FULL-AUTO AIR CONDITIONER]

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1.  The A/C amplifier calculates the rotation speed of the blower motor based on input from each switch, sensor and the set temperature.

2.  The calculated rotation speed is changed to a drive signal (pulse) and is output to the power transistor.

3.  The power transistor that receives the signal determines the drive voltage required to operate the motor based on the rotation speed output from the A/C amplifier and outputs it to the power MOS FET.

4.  The blower motor rotates at the same time the power MOS FET operates.

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