Overview

The STK672-110-SL-E is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.

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

1-2phase 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 0.22Ω current

detection resistor is built in, a current of 1A is set for each 0.22V 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 1.8A

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

Applications

? Office photocopiers, printers, etc.