AMIS30522C5222G ON Semiconductor, AMIS30522C5222G Datasheet - Page 17

• 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

exist per electrical period, yielding in total 4 zero−current
observation points per electrical period.
the coil during current decay, the coil voltage V
a transient behavior. As this transient is not always desired
in application software, two operating modes can be selected
by means of the bit <SLAT> (see “SLA−transparency” in
Table 12). The SLA pin shows in “transparent mode” full
visibility of the voltage transient behavior. This allows a
sanity−check of the speed−setting versus motor operation
and characteristics and supply voltage levels. If the bit
“SLAT” is cleared, then only the voltage samples at the end
of each coil current zero crossing are visible on the
Because of the relatively high re−circulation currents in
V
I
COIL
COIL
V
BB
Micro−Step
Previous
Figure 13. Principle of Bemf Measurement
I
COIL
Current Decay
COIL
Coil Current Zero Crossing
http://onsemi.com
shows
ZOOM
Voltage Transient
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Zero Current
SLA−pin. Because the transient behavior of the coil voltage
is not visible anymore, this mode generates smoother Back
e.m.f. input for post−processing, e.g. by software.
output level (0 V to 5 V), the sampled coil voltage V
divided by 2 or by 4. This divider is set through a SPI bit
<SLAG>. (See Table 12)
SLA−pin and the transparency−bit. “PWMsh” and
“Icoil=0” are internal signals that define together with SLAT
the sampling and hold moments of the coil voltage.
In order to bring the sampled Back e.m.f. to a descent
The following drawing illustrates the operation of the
V
BEMF
Micro−Step
|V
Next
BEMF
|
t
t
t
COIL
is