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PBL3717A Datasheet(PDF) 8 Page - System Logic Semiconductor

Part # PBL3717A
Description  STEPPER MOTOR DRIVER
Download  11 Pages
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Manufacturer  SLS [System Logic Semiconductor]
Direct Link  http://www.slsemicon.co.kr/e_index.htm
Logo SLS - System Logic Semiconductor

PBL3717A Datasheet(HTML) 8 Page - System Logic Semiconductor

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background image
L
≈
1
10
LM
C
≈
4
⋅ 10−10
L
Quarter Step Operation
It is preferable to realize the quarter step operation
at full power otherwise the steps will be of very ir-
regular size.
The extra quarter steps are added to the half steps
sequence by putting one coil on half current accord-
ing to the sequence.
AB
→
A
2
B
→ B →
A
__
2
B
→ AB → A
B
2
→ A etc.
Motor Selection
As the PBL3717A provides constant current drive,
with a switching operation, care must be taken to se-
lect stepper motors with low hysteresis losses to
prevent motor over heat.
L -C Filter
To reduce EMI and chopping losses in the motor a
low pass L -C filter can be inserted across the out-
puts of the PBL3717A as shown on the following pic-
ture.
Figure 6 :
Source Saturation Voltage versus
Output Current (recircuit period)
Figure 7 :
Source Saturation Voltage versus
Output Current (conduction period)
Figure 9 :
Comparator Threshold versus
Junction Temperature
Figure 8 :
Sink Saturation Voltage versus
Output Current
PBL3717A
8/11


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