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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), increased 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) 1.5 Rating Catalog Operating temperature range (°C) 0 to 70
Vs ABS (max) (V) 50 Peak output current (A) 1.5 Rating Catalog Operating temperature range (°C) 0 to 70
PDIP (N) 16 181.42 mm² 19.3 x 9.4 PLCC (FN) 28 155.0025 mm² 12.45 x 12.45
  • Full-Step, Half-Step and Micro-Step Capability
  • Bipolar Output Current up to 2A
  • Wide Range of Motor Supply Voltage: 10\x9650V
  • Low Saturation Voltage
  • Wide Range of Current Control: 5mA\x962A
  • Current Levels Selected in Steps or Varied Continuously
  • Thermal Protection and Soft Intervention
  • Full-Step, Half-Step and Micro-Step Capability
  • Bipolar Output Current up to 2A
  • Wide Range of Motor Supply Voltage: 10\x9650V
  • Low Saturation Voltage
  • Wide Range of Current Control: 5mA\x962A
  • Current Levels Selected in Steps or Varied Continuously
  • Thermal Protection and Soft Intervention

The UC3770A and UC3770B are high-performance full bridge drivers that offer higher current and lower saturation voltage than the UC3717 and the UC3770. Included in these devices are LS-TTL compatible logic inputs, current sense, monostable, thermal shutdown, and a power H-bridge output stage. Two UC3770As or UC3770Bs and a few external components form a complete micro-processor-controllable stepper motor power system.

Unlike the UC3717, the UC3770A and the UC3770B require external high-side clamp diodes. The UC3770A and UC3770B are identical in all regards except for the current sense thresholds. Thresholds for the UC3770A are identical to those of the older UC3717 permitting drop-in replacement in applications where high-side diodes are not required. Thresholds for the UC3770B are tailored for half stepping applications where 50%, 71%, and 100% current levels are desirable.

The UC3770A and UC3770B are specified for operation from 0°C to 70°C ambient.

The UC3770A and UC3770B are high-performance full bridge drivers that offer higher current and lower saturation voltage than the UC3717 and the UC3770. Included in these devices are LS-TTL compatible logic inputs, current sense, monostable, thermal shutdown, and a power H-bridge output stage. Two UC3770As or UC3770Bs and a few external components form a complete micro-processor-controllable stepper motor power system.

Unlike the UC3717, the UC3770A and the UC3770B require external high-side clamp diodes. The UC3770A and UC3770B are identical in all regards except for the current sense thresholds. Thresholds for the UC3770A are identical to those of the older UC3717 permitting drop-in replacement in applications where high-side diodes are not required. Thresholds for the UC3770B are tailored for half stepping applications where 50%, 71%, and 100% current levels are desirable.

The UC3770A and UC3770B are specified for operation from 0°C to 70°C ambient.

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Technical documentation

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Type Title Date
* Data sheet High Performance Stepper Motor Drive Circuit datasheet (Rev. A) 18 Feb 2000
White paper How smart tune regulates current in stepper motors (Rev. A) 19 Mar 2019

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PDIP (N) 16 View options
PLCC (FN) 28 View options

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