Overview

The STK672-640C-E is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.

Features

• Built-in opened motor pin detection function (output current OFF).

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

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

• If opened motor pin, over-current, or overheat detection function is activated, the FAULT1 signal (active low) is output. The FAULT2 signal is used to output the result of activation of protection circuit detection at 3 levels.

• 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.

Applications

• Office photocopiers, printers, etc.