SMD TCA3727G SO-24

2-phase Stepper Motor Driver
Bipolar IC

Motor / Motion / Ignition Controllers & Drivers


Features
• 2 × 0.75 amp. / 50 V outputs
• Integrated driver, control logic and current control
(chopper)
• Fast free-wheeling diodes
• Max. supply voltage 52 V
• Outputs free of crossover current
• Offset-phase turn-ON of output stages
• Z-diode for logic supply
• Low standby-current drain
• Full, half, quarter, mini step
• Green (RoHS compliant) thermally enhanced SO package
• AEC Qualified
Description
TCA3727G 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 0.75 A per phase at operating voltages up to
50 V.
The direction and value of current are programmed 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 have integrated, fast free-wheeling diodes and are free of crossover
current. The logic is supplied either separately with 5 V or taken from the motor supply voltage by way of a series
resistor and an integrated Z-diode. The device can be driven directly by a microprocessor with the possibility of all
modes from full step through half step to mini step.