STK672-440A-E View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

STK672-440A-E

Thick-Film Hybrid IC 2-phase Stepping Motor Driver

ON Semiconductor 

• Motor current peak value IOH setting

IOH

STK672-440A-E

0

[Smoke Emission Precuations]

If Pin 18 (S.G terminal) is attached to the PCB without using solder, overcurrent may flow into the MOSFET at

VCCON (24V ON), causing the STK672-440A-E to emit smoke because 5V circuits cannot be controlled.

In addition, as long as one of the output Pins, 1, 3, 4, or 5, is open, inductance energy stored in the motor results in

electrical stress on the driver, possibly resulting in the emission of smoke.

Function Table

M2

0

0

1

1

CLOCK Edge Timing for

M1

0

1

0

1

Phase Switching

M3

2-phase excitation

1-2-phase excitation

W1-2 phase

2W1-2 phase

1

CLOCK rising edge

selection

(IOH=100%)

excitation

excitation

1-2 phase excitation

W1-2 phase

2W1-2 phase

4W1-2 phase

0

CLOCK both edges

(IOH=100%, 71%)

excitation

excitation

excitation

IOH=100% results in the Vref voltage setting, IOH.

During 1-2 phase excitation, the hybrid IC operates at a current setting of IOH=100% when the CLOCK signal rises.

Conversely, pseudo micro current control is performed to control current at IOH=100% or 71% at both edges of the

CLOCK signal.

CWB pin

Forward/CW

0

Reverse/CCW

1

ENABLE • RESETB pin

ENABLE

RESETB

Motor current cut: Low

Active Low

No.A1128-7/21

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