A3981 데이터 시트보기 (PDF) - Allegro MicroSystems

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A3981

Automotive, Programmable Stepper Driver

Allegro MicroSystems 

A3981

Automotive, Programmable Stepper Driver

Functional Block Diagram

3.3V

VDD

REF

STEP

DIR

MS1

MS0

RESETn

ENABLE

SDI

SDO

SCK

STRn

DIAG

OSC

VREG

CP1 CP2

DAC REF

Oscillator

6-bit

DAC

SENSA

+-

Regulator

Charge

Pump

DMOS Full Bridge

PWM

Control

System

Control

and

Registers

Bridge

Control

Logic

Gate

Drive

DMOS Full Bridge

PWM

Control

REF

6-bit

DAC

+-

SENSB

VCP

VBAT

VBBA

OAP

OAM

SENSA

VBAT

VBBB

OBP

OBM

SENSB

Undervoltage, Overvoltage

Cold Warning, Hot Warning, Overtemperature

Short Detect, Open Load Detect

Stall Detect

AGND

PAD

PGND

Allegro MicroSystems, LLC

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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