Ordering number : EN6041

12799RM (OT) No. 6041-1/9

Overview

The STK672-110 is a unipolar fixed-current chopper type

2-phase stepping motor driver hybrid IC. It features power

MOSFETs in the output stage and a built-in phase signal

distribution IC. The incorporation of a phase distribution

IC allows the STK672-110 to control the speed of the

motor based on the frequency of an external input clock

signal. It supports two types of excitation for motor

control: 2-phase excitation and 1-2 phase excitation. It

also provides a function for switching the motor direction.

Applications

• Two-phase stepping motor drive in send/receive

facsimile units

• Paper feed in copiers, industrial robots, and other

applications that require 2-phase stepping motor drive

Features

• The motor speed can be controlled by the frequency of

an external clock signal (the CLOCK pin signal).

• The excitation type is switched according to the state

(low or high) of the MODE pin. The mode is set to

2-phase or 1-2 phase excitation on the rising edge of the

clock signal.

• A motor direction switching pin (the CWB pin) is

provided.

• All inputs are Schmitt inputs and 40-k

Ω (typical: –50 to

+100%) pull-up resistors are built in.

• The motor current can be set by changing the Vref pin

voltage. Since a 0.22-

Ω current detection resistor is built

in, a current of 1 A is set for each 0.22 V of applied

voltage.

• The input frequency range for the clock signal used for

motor speed control is 0 to 25 kHz.

5.0 V ±5%

• This IC supports motor operating currents of up to 1.8 A

at Tc = 105°C, and of up to 2.65 A at Tc = 25°C.

Package Dimensions

unit: mm

4168

1

12

11

×2=22

0.5

2.0

32.5

8.5

0.4

2.9

[STK672-110]

STK672-110

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Unipolar Fixed-Current Chopper (Self-Excited PWM) Scheme and Built-in Phase Signal Distribution IC

Two-Phase Stepping Motor Driver

(Square Wave Drive) Output Current: 1.8 A

Thick-Film Hybrid IC

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.