AMIS30522C5222G ON Semiconductor, AMIS30522C5222G Datasheet - Page 12

• Manufacturer Part Number: AMIS30522C5222G
• Description: IC MOTOR DVR MICRO STEP 32QFP
• Manufacturer: ON Semiconductor
• Type: Stepper Motor Driverr

Specifications of AMIS30522C5222G

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 1.2A
• Voltage - Supply: 6 V ~ 30 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VSQFP
• Package: 32NQFP EP
• Maximum Operating Current: 8 mA
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 6 V to 30 V
• Supply Current: 8 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Automatic Duty Cycle Adaptation
duty cycle of the PWM is adapted automatically to >50% to
Step Translator
Step Mode
means of SPI register Stepmode: SM[2:0], SPI register
DIRCNTRL and input pins DIR and NXT. It is translating
consecutive steps in corresponding currents in both motor
coils for a given stepmode.
through SPI−bits SM[2:0] (Table 12).
is set to the default 1/32 micro−stepping at position ‘0’.
Upon changing the Step Mode, the translator jumps to
position 0* of the corresponding stepping mode. When
Table 9. SQUARE TRANSLATOR TABLE FOR FULL STEP AND UNCOMPENSATED HALF STEP
In case the supply voltage is lower than 2*Bemf, then the
The Step Translator provides the control of the motor by
One out of 7 possible stepping modes can be selected
After power−on or hard reset, the coil−current translator
MSP[6:0]
000 0000
001 0000
010 0000
100 0000
101 0000
011 0000
110 0000
111 0000
Icoil
T
Duty Cycle
PWM
Uncompensated Half−Step
< 50%
Actual value
101
0*
1
2
3
4
5
6
7
Figure 8. Automatic Duty Cycle Adaptation
Duty Cycle > 50%
Stepmode ( SM[2:0] )
http://onsemi.com
12
Full Step
maintain the requested average current in the coils. This
process is completely automatic and requires no additional
parameters for operation.
remaining in the same Step Mode, subsequent translator
positions are all in the same column and increased or
decreased with 1. Table 10 lists the output current vs. the
translator position.
projected approximately on a circle in the (I
There are however two exceptions: uncompensated half step
and full step. In these stepmodes the currents are not
regulated to a fraction of I
regulated at 100%. In the (I
projected on a square. Table 9 lists the output current vs. the
translator position for these cases.
110
−
1
−
2
−
3
−
0
As shown in Figure 9 the output current−pairs can be
Duty Cycle < 50%
Coil x
max
−100
−100
−100
100
100
100
0
0
x
,I
but are in all intermediate steps
Set value
y
) plane the current−pairs are
% of I
max
t
Coil y
−100
−100
−100
100
100
100
x
0
0
,I
y
) plane.