ON Semiconductor STK672-630AN-E

Description
The STK672-630AN-E is a hybrid IC designed for use as a unipolar, 2-phase stepper motor driver with PWM current control. It incorporates a current detection resistor, allowing motor current to be set using two external resistors. The device features built-in overcurrent and overheat detection functions, as well as a power-on reset function. The motor speed is controlled by the frequency of an external clock signal, and the excitation mode can be switched between 2-phase and 1-2 phase. The device also supports schmitt input for 2.5V high-level input.

Features
Built-in overcurrent detection function, overheat detection function (output current OFF)
FAULT signal (active low) output when overcurrent or overheat is detected
Built-in power on reset function
Motor speed controlled by external clock signal frequency
2-phase or 1-2 phase excitation switching function (phase maintained even when excitation mode is switched)
Rotational direction switching function
Supports schmitt input for 2.5V high level input
Wide current setting range for reduced power consumption during standby
No motor sound generated during hold mode due to external excitation current control
Compatible pins with STK672-632AN/-640AN/-642AN-E

Applications
Office photocopiers
Printers