POWER MOS FET FUNCTION
id074000117300
Function
• Controls the supply voltage to the blower motor according to the gate voltage sent from the climate control unit and adjusts the rotation speed (airflow volume).
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1
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Power MOS FET
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2
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Blower relay
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3
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Blower motor
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4
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Gate voltage
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5
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Climate control unit
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Construction/Operation
• There are three electrodes: source, gate, and drain electrodes.
• The resistance between terminals B and A (between drain and source) changes according to the voltage (gate voltage) applied to terminal E (gate).
• When the gate voltage increases, the resistance between terminals B and A decreases, allowing the current to flow easily.
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1
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Small current
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2
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Low gate voltage
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3
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Large current
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4
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High gate voltage
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