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3967 Datasheet(PDF) 12 Page - Allegro MicroSystems

Part # 3967
Description  MICROSTEPPING DRIVER WITH TRANSLATOR
PDF  16 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3967 Datasheet(HTML) 12 Page - Allegro MicroSystems

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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
3967
MICROSTEPPING DRIVER
WITH TRANSLATOR
12
Dwg. WK-004-17
PHASE 1
CURRENT
PHASE 2
CURRENT
STEP
INPUT
SLOW
DECAY
MIXED
DECAY
SLOW
DECAY
MIXED
DECAY
100%
–100%
100%
–100%
SLOW
DECAY
MIXED
DECAY
SLOW
DECAY
MIXED
DECAY
38.3%
70.7%
–70.7%
70.7%
–70.7%
–38.3%
38.3%
–38.3%
Quarter Step Operation
MS1 = L, MS2 = H, DIR = H
The mixed-decay mode is controlled by the percent fast
decay voltage (VPFD). If the voltage at the PFD input is
greater than 0.6VCC then slow-decay mode is selected. If
the voltage on the PFD input is less than 0.21VCC then
fast-decay mode is selected. Mixed decay is between
these two levels.



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