Focus MOSFET application – Climate control

High performance MOSFETs for PWM control

Application Considerations

The heating, ventilation, and air conditioning (HVAC) system regulates the temperature and quality of the air inside the vehicle cabin. This is often referred to as climate control.

The electrically controlled elements are the blower fan motor and flap valves that divert the airflow.

The blower fan motor is usually a simple brushed DC motor, with its speed controlled by a MOSFET operating in PWM or linear mode. The flap valves are usually controlled by an integrated IC.

Key MOSFET Requirements:

  • Switching capability for PWM control
  • Low package thermal resistance
  • Low on-resistance
  • Good current handling



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LFPAK56 is well suited to HVAC applications due to excellent current handling and thermal performance.

Main benefits:

  • Robust product using advanced copper clip technology
  • Excellent current handling
  • Low on-resistance

I2PAK & TO-220 are ideal solutions for HVAC systems where through-hole mounting is used to optimise thermal performance and current handling.

Main benefits:

  • Separate current and thermal paths
  • CVlamp, screw and solder mounting
  • Low on-resistance
  • High current handling capability

BUK7610-55AL is specifically designed for thermally stable linear mode control applications.

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Focus MOSFET application – Climate control
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Products

Type number Description Status Quick access
BUK753R1-40E N-channel TrenchMOS standard level FET Production
BUK7610-55AL N-channel TrenchMOS standard level FET Production
BUK7E4R6-60E N-channel TrenchMOS standard level FET Production
BUK7Y3R5-40E N-channel 40 V, 3.5 mΩ standard level MOSFET in LFPAK56 Production
BUK7Y4R4-40E N-channel 40 V, 4.4 mΩ standard level MOSFET in LFPAK56 Production
BUK7Y4R8-60E N-channel 60 V, 4.8 mΩ standard level MOSFET in LFPAK56 Production
BUK7Y7R8-80E N-channel 80 V, 7.8 mΩ standard level MOSFET in LFPAK56 Production

Documentation

File name Title Type Date
HVAC_cold_hot_A3 HVAC Cold Hot Marcom graphics 2015-03-17

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