AMIS30621C6217RG ON Semiconductor, AMIS30621C6217RG Datasheet - Page 31

• Manufacturer Part Number: AMIS30621C6217RG
• Description: IC MOTOR STEPPER DVR/CTLR 20SOIC
• Manufacturer: ON Semiconductor
• Type: Micro Stepping Motor Driverr

Specifications of AMIS30621C6217RG

• Number Of Outputs: 4
• Voltage - Supply: 6.5 V ~ 29 V
• Operating Temperature: -40°C ~ 165°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 6.5 V to 29 V
• Supply Current: 800 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Applications: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Motordriver
Current Waveforms in the Coils
Figure 18 below illustrates the current fed to the motor coils by the motor driver in half−step mode.
Whereas Figure 19 below shows the current fed to the coils in 1/16
PWM Regulation
or <Ihold> and the current position of the rotor) through
the motor coil while ensuring high energy transfer
efficiency, a regulation based on PWM principle is used. The
regulation loop performs a comparison of the sensed output
current to an internal reference, and features a digital
regulation generating the PWM signal that drives the output
In order to force a given current (determined by <Irun>
Figure 19. Current Waveforms in Motor Coils X and Y in 1/16
Ix
Iy
Figure 18. Current Waveforms in Motor Coils X and Y in Halfstep Mode
Ix
Iy
Coil Y
Coil Y
Coil X
Coil X
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switches. The zoom over one micro−step in the Figure 19
above shows how the PWM circuit performs this regulation.
Motor Starting Phase
switched from <Ihold> to <Irun> with a new
sine/cosine ratio corresponding to the first half (or micro−)
step of the motion.
At motion start, the currents in the coils are directly
th
micro stepping (1 electrical period).
th
Micro−Step Mode
t
t