AMIS30623C623BRG ON Semiconductor, AMIS30623C623BRG Datasheet - Page 13

• Manufacturer Part Number: AMIS30623C623BRG
• Description: IC MOTOR DRIVER/CTLR 32-QFP
• Manufacturer: ON Semiconductor

Specifications of AMIS30623C623BRG

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: 800mA
• Voltage - Supply: 6.5 V ~ 29 V
• Operating Temperature: -40°C ~ 165°C
• Mounting Type: Surface Mount
• Package / Case: 32-VSQFP
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Position Ranges
chosen stepping mode, the position range will be as shown in the following table.
coded on 16 bits, the position word will have to be shifted to
the left by a certain number of bits, according to the stepping
mode.
Important
NOTES: The secure position is disabled in case the programmed value is the reserved code “10000000000” (0x400 or most negative
Shaft
command SetMotorParam, defines whether a positive
motion is a clockwise (CW) or counter−clockwise rotation
(CCW) (an outer or an inner motion for linear actuators):
Stepper Motordriver
control logic. The main features are:
•
Table 11. POSITION RANGE
Table 12. SECURE POSITION
SetPositionShort
A position is coded by using the binary two’s complement format. According to the positioning commands used and to the
When using the command SetPosition, although
A shaft bit, which can be programmed in OTP or with
See also the Block Diagram in Figure 1.
The Motordriver receives the control signals from the
Two H−bridges, designed to drive a stepper motor with
two separated coils. Each coil (X and Y) is driven by
one H−bridge, and the driver controls the currents
flowing through the coils. The rotational position of the
SetPosition
Command
position).
The resolution of the secure position is limited to 9 bit at start−up. The OTP register is copied in RAM as illustrated below. The
RAM bits SecPos1 and SecPos0 are set to 0.
SecPos10
SecPos10
1/16
1/4
1/8
Stepping Mode
th
th
Half−stepping
th
micro−stepping
micro−stepping
1/16
micro−stepping
SecPos9
SecPos9
1/4
1/8
Stepping Mode
th
th
Half−stepping
Half−stepping
th
micro−stepping
micro−stepping
micro−stepping
SecPos8
SecPos8
STRUCTURAL DESCRIPTION
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−16384 to +16383
−32768 to +32767
−4096 to +4095
−8192 to +8191
−1024 to +1023
Position Range
13
Secure Position
11−bits, thus having a lower resolution than normal
positions, as shown in the following table. See also
command GotoSecurePosition and LIN lost behavior.
•
•
Exception: in RunVelocity mode, the shaft bit has no
function. In this mode the rotational direction is always CW
or CCW, which is only determined by the motor wiring.
•
A secure position can be programmed. It is coded in
Shaft = 0 ⇒ MOTXP is used as positive pin of the X
coil, while MOTXN is the negative one.
Shaft = 1 ⇒ opposite situation
rotor, in unloaded condition, is defined by the ratio of
current flowing in X and Y. The torque of the stepper
motor when unloaded is controlled by the magnitude of
the currents in X and Y.
The control block for the H−bridges, including the
PWM control, the synchronous rectification and the
internal current sensing circuitry.
SecPos2
SecPos2
Secure Position Resolution
Full Range Excursion
SecPos1
32 micro−steps (1/16
FailSafe
16 micro−steps (1/8
16384 micro−steps
32768 micro−steps
65536 micro−steps
8 micro−steps (1/4
8192 half−steps
2048 half−steps
4 half−steps
SecPos0
SleepEn
th
th
th
)
)
)
Number of Bits
RAM
OTP
13
14
15
16
11