STK672-040(2000) Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

STK672-040
(Rev.:2000)

Stepping Motor Driver (Sine Wave Drive) Output Current: 1.5 A (No Heat Sink*)

SANYO -> Panasonic 

STK672-040

• M1, M2, and M3 (Excitation mode and CLK input edge timing selection)

Pin circuit type: Built-in pull-up resistor (20 kΩ, typical) CMOS Schmitt trigger structure

Function:

M2

M1

M3

1

0

0

0

2 phase excitation

1-2 phase excitation

0

1

1

1

0

1

1-2 phase excitation W1-2 phase excitation 2W1-2 phase excitation

W1-2 phase excitation 2W1-2 phase excitation 4W1-2 phase excitation

Phase switching clock edge timing

Rising edge only

Rising and falling edges

Valid mode setting timing: Applications must not change the mode in the period 5 µs before or after a CLK signal rising

or falling edge.

Mode Setting Acquisition Timing

CLK input

System clock

Mode setting

M1 to M3

Mode switching clock

Hybrid IC internal setting state

Mode switching timing

Phase excitation clock

• M4 and M5 (Microstepping mode rotation vector locus setting)

M4

1

0

1

0

M5

1

0

0

1

Mode Circular

Œ



Ž

See page 10 for details on the current division ratio.

Excitation counter up/down

A06846

Phase B

1

2

Circular

3

Phase A

A06847

• RESET (Resets all parts of the system.)

Pin circuit type: Built-in pull-up resistor (20 kΩ, typical) CMOS Schmitt trigger structure

Function:

—All circuit states are set to their initial values by setting the RESET pin low. (Note that the pulse width must be at

least 10 µs.)

At this time, the A and B phases are set to their origin, regardless of the excitation mode. The output current goes to

about 71% after the reset is released.

Notes: When power is first applied to this hybrid IC, Vref must be established by applying a reset. Applications must

apply a power on reset when the VCC2 power supply is first applied.

• Vref (Sets the current level used as the reference for constant-current detection.)

Pin circuit type: Analog input structure

Function:

—Constant-current control can be applied to the motor excitation current at 100% of the rated current by applying a

voltage less than the control system power supply voltage VCC2 minus 2.5 V.

—Applications can apply constant-current control proportional to the Vref voltage, with this value of 2.5 V as the

upper limit.

No. 5227-10/19

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