62911HKPC 5-7063/42011HKIM/71608HKIM No.A1137-1/15

STK673-011-E

Overview

The STK673-011-E is a 3-phase stepping motor driver hybrid IC with built-in microstep controller having a bipolar

constant current PWM system, in which a power MOSFET is employed at an output stage.

It includes a 3-phase distributed controller for a 3-phase stepping motor to realize a simple configuration of the motor

driver circuit.

The number of motor revolution can be controlled by the frequency of external clock input. 2, 2-3, W2-3 and 2W2-3-

phase excitation modes are available. The basic step angle of the stepping motor can be separated as much as one-eighth

2-3-phase to 2W2-3-phase excitation mode control quasi-sine wave current, thereby realizing low vibration and low

noise.

Applications

• As a 3-phase stepping motor driver for transmission and reception in a facsimile.

• As a 3-phase stepping motor driver for feeding paper feed or for an optical system in a copying machine.

• Industrial machines or products employing 3-phase stepping motor driving.

Features

• Number of motor revolution can be controlled by the frequency of external clock input.

• 4 types of modes, i.e., 2, 2-3, W2-3 and 2W2-3-phase excitations, are available which can be selected based on rising

of clock signals, by switching highs and lows of Mode A and Mode B terminals.

• Setting a Mode C terminal low allows an excitation mode that is based on rising and falling of a clock signal.

By setting the Mode C terminal low, phases that are set only by Mode A and Mode B can be changed to other phases

as follows without changing the number of motor revolution: 2-phase may be switched to 2-3-phase; 2-3-phase may

be switched to W2-3-phase; and W2-3-phase may be switched to 2W2-3-phase.

• Phase is maintained even when the excitation mode is changed.

Continued on next page.

Ordering number : ENA1137B

Thick-Film Hybrid IC

3-Phase Stepping Motor Driver

Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

device, the customer should always evaluate and test devices mounted in the customer

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

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instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

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customer who is considering such use and/or outside the scope of our intended standard applications, please

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