Ordering number : EN6041
Thick-Film Hybrid IC
STK672-110
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
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
• All inputs are Schmitt inputs and 40-kΩ (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.
• Supply voltage ranges: V
CC
1 = 10 to 42 V, V
CC
2 =
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
[STK672-110]
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.
32.5
8.5
26.0
1
2.0
11×2=22
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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12799RM (OT) No. 6041-1/9
4.0
12
0.5
1.0
0.4
2.9
SANYO [ SANYO SEMICON DEVICE ]
