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Overview

The STK672-632A-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 (0.141Ω: 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 STK672-630A-E)

Applications

? Office photocopiers, printers, etc.