3977 データシートの表示（PDF） - Allegro MicroSystems

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3977

MICROSTEPPING DMOS DRIVER WITH TRANSLATOR

Allegro MicroSystems 

3977

MICROSTEPPING DMOS DRIVER

WITH TRANSLATOR

FUNCTIONAL BLOCK DIAGRAM

LOGIC

SUPPLY

VDD

REF.

SUPPLY

REF

RC1

STEP

DIR

RESET

MS1

MS2

HOME

SLEEP

VPFD SR

ENABLE

PFD

RC2

UVLO

AND

FAULT

2V

REGULATOR

BANDGAP

VREG

CP2 CP1

CHARGE

PUMP

DAC

SENSE1 VCP

DMOS H BRIDGE

+-

PWM LATCH

BLANKING

MIXED DECAY

4

PWM TIMER

DMOS H BRIDGE

PWM TIMER

4

PWM LATCH

BLANKING

MIXED DECAY

+-

DAC

VCP

VBB1

LOAD

SUPPLY

OUT1A

OUT1B

SENSE1

VBB2

OUT2A

OUT2B

SENSE2

Dwg. FP-050-2

2

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

Copyright © 2002, 2003 Allegro MicroSystems, Inc.

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