SPMD250STP STMicroelectronics, SPMD250STP Datasheet - Page 11

• Manufacturer Part Number: SPMD250STP
• Description: MOD STEPPER MOTOR DRV 2.5A BIPO
• Manufacturer: STMicroelectronics
• Series: EASY POWER™r
• Type: Stepper Motor Driverr

Specifications of SPMD250STP

• Motor Type: Stepper, Bipolar
• Number Of Motors: 1
• Voltage - Output: 40V
• Voltage - Logic Supply: 4.5 V ~ 5.5 V
• Current - Output: 2.5A
• Transistor Type: MOSFET
• Termination Style: PC Pin
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 12V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 40V
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 5 V
• Mounting Style: SMD/SMT
• For Use With: 497-10050 - BOARD EVAL SPMD250497-9011 - DEMO SYSTEM BASED ON SPMD250STP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8416

SPMD250STP
5.3
Half step drive
This sequence halves the effective step angle of the motor but gives a less regular torque
being one winding or two windings alternatively energized.
Eight steps are required for a complete revolution of the rotor.
The sequence is:
AB ; AB & CD ; CD ; CD & BA ; BA ; BA & DC ; DC ; DC & AB
as shown in
By the configurations of
half step). Real motors have multiple poles pairs to reduce the step angle to a few degrees
but the number of windings (two) and the drive sequence are unchanged.
Figure 6.
Figure 7.
Figure 8.
Figure
One-phase-on (wave mode) drive
Two-phase-on (normal mode) drive
Half step sequence
8.
Figure
Doc ID 14350 Rev 2
6, 7,
8
the motor would have a step angle of 90 ° (or 45 ° in
Bipolar stepper motor basics
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