参数资料
型号: CS3717AGNF16
厂商: ON SEMICONDUCTOR
元件分类: 运动控制电子
英文描述: STEPPER MOTOR CONTROLLER, 1 A, PDIP16
封装: 0.300 INCH, PLASTIC, MS-001, DIP-16
文件页数: 5/8页
文件大小: 72K
代理商: CS3717AGNF16
5
For rotation in the other direction the sequence must be
reversed.
The torque of each step is constant in full step operation.
Half step operation
Power is applied alternately to one winding then both
according to the sequence:
AB
→B→ B→→
→ →A →A etc.
Like full step this can be done at any current level; the
torque is not constant but is lower when only one wind-
ing is energized.
A coil is turned off by setting IN0 and IN1 both high.
Quarter step operation
It is preferable to realize the quarter step operation at full
power otherwise the steps will be of very irregular size.
B
AB
A
The extra quarter steps are added to the half step
sequence by putting one coil on half current according to
the sequence.
AB
→ B→B→ B→ B→→ etc.
Motor selection
As the CS3717A provides constant current drive with a
switching operation, care must be taken to select stepper
motors with low hysteresis losses to prevent motor over-
heating.
L-C filter
To reduce EMI and chopping losses in the motor, a low
pass L-C filter can be inserted across the outputs of the
CS3717A as shown in the following diagram.
A
B
2
A
2
A
2
IN0A
FULL STEP MOTOR DRIVE
1M = 500mA
HALF STEP MOTOR DRIVE
1M = 250mA
STAND BY WITH
HOLDING TORQUE
1M = 80mA
IN1A
DIRECTIONA
DIRECTIONB
IN0B
IN1B
500 mA
IMA
500 mA
IMB
- 500 mA
12345678
IN
OUT
Input and Output Sequences for Half Step and Full Step Operation
L
L M
1
10
C
4 10
10
L
C
OUTA
CS3717A
OUTB
L
MOTOR
WINDING
(LM, RM)
CS3717A
Application Information: continued
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