L6223

The L6223 is a programmable integrated system  for driving a unipolar stepper motor. It is realized in Multipower BCD technology. The DMOS output stage, realized by a single upper DMOS switch and four lower DMOS, can deliver up to 1A/phase with motor supply voltages up to 46V.

All inputs are CMOS and microprocessor compatible. An internal 6-bit shift register allows the device to be programmed to select different duty cycles in open loop mode and different chopping frequencies in closed loop mode. When the current control is in closed loop mode it is also possible to select a reduced current chopping level to optimize system efficiency. The L6223 is de-signed to work with a single sense resistor. During  chopping t(OFF) time the current is reduced by half, improving efficiency. Higher current applications can be achieved by paralleling two L6223.  The L6223 is mounted in a 20-lead Powerdip package, (16+2+2). Four ground leads conduct heat to dedicated heatsink area on the PCB.