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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).

1 | Power MOS FET
2 | Blower relay
3 | Blower motor
4 | Gate voltage
5 | Climate control unit

## Construction/Operation

• There are three electrodes: source, gate, and drain electrodes.

1 | Gate
2 | Drain
3 | Source

• 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.

1 | Small current
2 | Low gate voltage
3 | Large current
4 | High gate voltage