LM621 Datasheet | National Semiconductor

LM621 Brushless Motor mutator August 1992 LM621 Brushless Motor mutator General Description The LM621 is a bipolar IC designed for mutation of brushless DC motors The part is patible 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 spiking in the power switching circuitry Operation is from a 5V supply but output swings of up to 40V are acmodated The part is packaged in an 18-pin dual-in-line package Features Adjustable dead-time feature eliminates current spiking On-chip clock oscillator for dead-time...