Overview

The STK672-642A-E is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.

Features

• Built-in overcurrent detection function (output current OFF).

• Built-in overheat detection function (output current OFF).

• If either over-current or overheat detection function is activated,

the FAULT signal (active low) is output.

• Built-in power on reset function.

• The motor speed is controlled by the frequency of

an external clock signal.

• 2 phase or 1-2 phase excitation switching function.

• Using either or both edges of the clock signal switching function.

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

• Rotational direction switching function.

• Supports schmitt input for 2.5V high level input.

• Incorporating a current detection resistor

(0.089Ω: resistor tolerance ±2), motor current

can be set using two external resistors.

• The ENABLE pin can be used to cut output current

while maintaining the excitation mode.

• With a wide current setting range, power consumption

can be reduced during standby.

• No motor sound is generated during hold mode due to

external excitation current control.

• Miniature package (provides pin compatibility with STK672-640A-E)

Applications

• Office photocopiers, printers, etc.