STK672-630A-E 查看數據表（PDF） - ON Semiconductor

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STK672-630A-E

Thick-Film Hybrid IC 2-phase Stepping Motor Driver

ON Semiconductor 

STK672-630A-E

7. Example of Stepping Motor Driver Output Current Path (1-2 phase excitation)

2-phase stepping motor

IOA

IOAB

VDD=5V

MODE1

N.C

MODE2

CLOCK

CWB

RESETB

ENABLE

FAULT

S.G

Vref

N.C N.C

A

AB

B

BB

Excitatin

mode setting

Phase

advnce

counter

Power

on

reset

VDD

Phase

excitation

signal

generation

Latch

Over

current

detection

FAULT

signal

(Opendrain)

Over heat Latch

detection

Chopper

circuit

Vref/4.9

VSS Amp

VSS

F1

FAO

FAB

FBO

FBB

AI

BI

Vref

100kΩ

V

F2

F3

F4

P.G2

P.G1

VCC

24V

+ C02

at least 100μF

P.GND

CLOCK

Phase A output

current

IOA

Phase AB output

current

IOAB

PWM operations

When PWM operations of IOA

are OFF, for IOAB, negative

current flows through the

parasitic diode, F2.

When PWM operations of IOAB

are OFF, for IOA, negative

current flows through the

parasitic diode, F1.

No. A1129-20/21

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