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DRV8231A ACTIVE 35-V, 3.7-A H-bridge motor driver with integrated current regulation & current-sense feedback Increased voltage range (33V), more current (3.7A), integrated current sensing, smaller package size
DRV8434 ACTIVE 48-V, 2.5-A bipolar stepper motor driver with integrated current sensing and 1/256 microstepping Wider voltage range (4.5V min), increased current (2.5A), up to 1/256 microstep indexer, more protection features
DRV8436E ACTIVE 48-V, 1.5-A bipolar stepper or dual-brushed motor driver with integrated current sensing Wider voltage range (4.5V min), more current (1.5A), PH/EN and PWM control

Product details

Vs ABS (max) (V) 50 Peak output current (A) 1 Rating Catalog Operating temperature range (°C) 0 to 70
Vs ABS (max) (V) 50 Peak output current (A) 1 Rating Catalog Operating temperature range (°C) 0 to 70
PDIP (N) 16 181.42 mm² 19.3 x 9.4
  • Full-Step, Half-Step and Micro-Step Capability
  • Bipolar Output Current up to 1A
  • Wide Range of Motor Supply Voltage 10-46V
  • Low Saturation Voltage with Integrated Bootstrap
  • Built-In Fast Recovery Commutating Diodes
  • Current Levels Selected in Steps or Varied Continuously
  • Thermal Protection with Soft Intervention
  • Full-Step, Half-Step and Micro-Step Capability
  • Bipolar Output Current up to 1A
  • Wide Range of Motor Supply Voltage 10-46V
  • Low Saturation Voltage with Integrated Bootstrap
  • Built-In Fast Recovery Commutating Diodes
  • Current Levels Selected in Steps or Varied Continuously
  • Thermal Protection with Soft Intervention

The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor. The UC3717A has been modified to supply higher winding current, more reliable thermal protection, and improved efficiency by providing integrated bootstrap circuitry to lower recirculation saturation voltages. The diagram shown below presents the building blocks of the UC3717A. Included are an LS-TTL compatible logic input, a current sensor, a monostable, a thermal shutdown network, and an H-bridge output stage. The output stage features built-in fast recovery commutating diodes and integrated bootstrap pull up. Two UC3717As and a few external components form a complete control and drive unit for LS-TTL or micro-processor controlled stepper motor systems.

The UC3717A is characterized for operation over the temperature range of 0°C to +70°C.

The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor. The UC3717A has been modified to supply higher winding current, more reliable thermal protection, and improved efficiency by providing integrated bootstrap circuitry to lower recirculation saturation voltages. The diagram shown below presents the building blocks of the UC3717A. Included are an LS-TTL compatible logic input, a current sensor, a monostable, a thermal shutdown network, and an H-bridge output stage. The output stage features built-in fast recovery commutating diodes and integrated bootstrap pull up. Two UC3717As and a few external components form a complete control and drive unit for LS-TTL or micro-processor controlled stepper motor systems.

The UC3717A is characterized for operation over the temperature range of 0°C to +70°C.

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Technical documentation

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Type Title Date
* Data sheet Stepper Motor Drive Circuit datasheet 05 Sep 1999
White paper How smart tune regulates current in stepper motors (Rev. A) 19 Mar 2019
Application note UC3717 and L-C Filter Reduce EMI and Chopping Losses in Step Motor 05 Sep 1999

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PDIP (N) 16 View options

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