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LM621 |
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| Part Number | LM621 |
| Manufacturer | National Semiconductor |
| 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 ... |
| 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 pulse-width modulator output(s) via OUTPUT INHIBIT (PWM magnitude) and DIRECTION (PWM sign) inputs ... |
| Document |
 LM621 Data Sheet
PDF 224.72KB |
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