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A3977SED-T Datasheet(PDF) 3 Page - Allegro MicroSystems

Part # A3977SED-T
Description  Microstepping DMOS Driver with Translator
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3977SED-T Datasheet(HTML) 3 Page - Allegro MicroSystems

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Microstepping DMOS Driver with Translator
A3977
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
FUNCTIONAL BLOCK DIAGRAM
DMOS H BRIDGE
DMOS H BRIDGE
CHARGE
PUMP
CP2
CP1
VCP
LOAD
SUPPLY
VBB1
OUT 1A
OUT1B
OUT 2A
OUT2B
VBB2
SENSE1
VCP
Dwg. FP-050-2
VREG
PWM TIMER
PWM TIMER
PWM LATCH
BLANKING
MIXED DECAY
UVLO
AND
FAULT
REGULATOR
BANDGAP
DAC
+ -
+ -
DAC
2 V
SENSE1
PWM LATCH
BLANKING
MIXED DECAY
SENSE2
4
4
REF
LOGIC
SUPPLY
VDD
STEP
DIR
MS 1
SLEEP
MS 2
HOME
ENABLE
RC1
RESET
SR
PFD
RC2
REF.
SUPPLY
VPFD


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