Automatic HVAC - BLDC blower motor

In Heating, Ventilation, and Air Conditioning (HVAC) systems, the trend is towards temperature control with PWM driven brushless DC motors. Overall system reliability and efficiency is improved compared with linear operation and brushed motors. This delivers significant performance, fuel and CO2 savings over the lifetime of the vehicle.

Block diagram
Design considerations
Product listing
Support

Block diagram

Highlighted components are Nexperia focus products.

Transient Voltage Suppressors (TVS)

Reverse battery protection

Motor drive MOSFETs

ESD bus protection

Ballast transistor

MOSFET gate driver

Select a component

To view more information about the Nexperia components used in this application, please select a component above or click on a component (highlighted in blue) in the block diagram.

Design considerations

50 W – 400 W Brushless DC motor drive
BLDC preferred for controllability and low power performance
Controlled by 6 MOSFETs operated with PWM
puts the focus on switching losses and EMC performance\power saving of 100 W on average emission reduction of approx. 0.24 kg CO2 per 100 km.
Applications face a high ambient temperature

Product listing

Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)