Description
The LM621 is a bipolar IC designed for commutation of brushless DC motors The part is compatible with both three- and four-phase motors It can directly drive the power switching devices used to drive the motor The LM621 provides an adjustable dead-time circuit to eliminate ‘‘shootthrough’’ current s
Features
- Y Y
Y Y Y
Adjustable dead-time feature eliminates current spiking On-chip clock oscillator for dead-time feature
Outputs drive bipolar power devices (up to 35 mA base current) or MOSFET power devices Compatible with three- and four-phase motors Bipolar drive to delta- or Y-wound motors Unipolar drive to center-tapped Y-wound motors Supports 30- and 60-degree shaft position sensor placements for three-phase motors Supports 90-degree sensor placement for four-phase motors Directly interfaces to.
LM621 Datasheet
