STK672-432B-E

No.A1733-7/26

• Motor current peak value IOH setting

[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), to emit smoke because 5V circuits cannot be controlled.

Function Table

M2

0

0

1

1

M1

M3

0

1

0

1

CLOCK Edge Timing for

Phase Switching

1

2-phase excitation

selection

1-2-phase excitation

(IOH=100%)

W1-2 phase

excitation

2W1-2 phase

excitation

CLOCK rising edge

0

1-2 phase excitation

(IOH=100%, 71%)

W1-2 phase

excitation

2W1-2 phase

excitation

4W1-2 phase

excitation

CLOCK both edges

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

Motor current cut: Low

RESETB

Active Low

IOH

0