Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC power devices

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

Low-voltage (< 48 V) bipolar stepper motor

Compared to their unipolar counterparts, low-voltage (< 48 V) bipolar stepper motors offer higher torque density and improved efficiency. By driving current in both directions through a single winding, bipolar motors deliver superior torque-to-size ratios, although this does come at the cost of a more complex H-bridge drive topology. Higher winding inductance, back-EMF at elevated speeds, and the need for precise current control across all four switching elements further increase design complexity.

  • Block diagram
  • Design considerations
  • Design resources
  • Product listing
  • Support

Block diagram

AC / DC Power management Input powerprotection Gatedriver Commsinterrface Signalprocessing Sensorinterface aaa-045214 Inverter stage CPU CAN Wired / Wireless grid Highlighted components are Nexperia focus products.

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

  • Mismatched RDS(on) between high- and low-side devices introduces current asymmetry, degrading step accuracy and increasing audible noise
  • Inadequate dead-time control can cause shoot-through, resulting in destructive cross-conduction currents
  • With four active switching elements per phase versus two in a unipolar design, total power dissipation and switching losses are higher

Product listing