STK672-120-E Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 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 2.4A

Ordering number : EN6042A
STK672-120-E
Thick-Film Hybrid IC
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 2.4A
http://onsemi.com
Overview
The STK672-120-E 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 STK672-120-E 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 40kΩ (typical: –50 to +100%) pull-up resistors are built in.
• The motor current can be set by changing the Vref pin voltage. Since a 0.165Ω current detection resistor is built in, a
current of 1A is set for each 0.165V of applied voltage.
• The input frequency range for the clock signal used for motor speed control is 0 to 25kHz.
• Supply voltage ranges: VCC = 10 to 42V, VDD = 5.0V ±5%
• This IC supports motor operating currents of up to 2.4A at Tc = 105°C, and of up to 4.0A at Tc = 25°C.
Semiconductor Components Industries, LLC, 2013
June, 2013
61108HKIM/12299RM (OT) No.6042-1/9