TLE4727

2-Phase Stepper-Motor Driver TLE 4727 Bipolar IC Overview Features 2 × 0.7 amp. outputs Integrated driver, control logic and current control (chopper) Fast free-wheeling diodes Max. supply voltage 45 V Outputs free of crossover current Offset-phase turn-ON of output stages All outputs short-circuit proof 5 V output for logic supply Error-flag for overload, open load, overtemperature Type TLE 4727 Description The TLE 4727 is a bipolar, monolithic IC for driving bipolar stepper motors, DC motors and other inductive loads that operate on constant current. The control logic and power output stages for two bipolar windings are integrated on a single chip which permits switched current control of motors with 0.7 A per phase at operating voltages up to 16 V. The direction and value of current are programmable for each phase via separate control inputs. A common oscillator generates the timing for the current control and turn-on with phase offset of the two output stages. The two output stages in a full-bridge configuration include fast integrated free-wheeling diodes and are free of crossover current. The device can be driven directly by a microprocessor in several modes by programming phase direction and current control of each bridge independently. A stabilized 5 V output allows the supply of external components up to 5 mA. With the error output the TLE 4727 signals malfunction of the device. Setting the control inputs high resets the error flag and by reactiva...