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A3957 - FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

Datasheet Summary

Description

Slow Current-Decay Mode Mixed Current-Decay Mode Fast Current-Decay Mode Table 3 DAC Truth Table DAC Data D3 D2 D1 D0 HHHH HHH L HH L H HHL L H L HH HLHL HL LH HL L L L HHH L HH L LHLH LHL L L LHH L LHL LLLX Current Ratio, % 100 VREF/VS 3.00 95.7 3.13 91.3 3.29 87.0 3.45 82.6

Features

  • ±1.5 A Continuous Output Current.
  • 50 V Output Voltage Rating.
  • Internal PWM Current Control.
  • 4-Bit Non-Linear DAC for 16-Bit Microstepping.
  • Satlington® Sink Drivers.
  • Fast, Mixed Fast/Slow, and Slow Current-Decay Modes.
  • Internal Transient-Suppression Diodes.
  • Internal Thermal-Shutdown Circuitry.
  • Crossover-Current and UVLO Protection Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C. † Per SEMI.

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Datasheet preview – A3957

Datasheet Details

Part number A3957
Manufacturer Allegro
File Size 473.00 KB
Description FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
Datasheet download datasheet A3957 Datasheet
Additional preview pages of the A3957 datasheet.

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Full PDF Text Transcription

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Data Sheet 29319.44B 3957 FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER The A3957SLB is designed for driving one winding of a bipolar stepper NO 1 NC CONNECT NC 24 NO CONNECT motor in a microstepping mode. The outputs are rated for continuous output currents to ±1.5 A and operating voltages to 50 V. Internal pulse-width PFD 2 VBB REF 3 NO CONNECT 4 NC T RC 5 C GROUND 6 U GROUND 7 LOGIC D D 3 8 LOGIC O SUPPLY 9 VCC Y PHASE 10 R L D2 11 P N NO CONNECT 12 NC 23 LOAD SUPPLY 22 OUTB NC 21 NO CONNECT 20 D 0 19 GROUND 18 GROUND 17 SENSE NC 16 NO CONNECT 15 OUTA NC 14 NO CONNECT 13 D 1 D E O Dwg. PP-056-4 E C ABSOLUTE MAXIMUM RATINGS U N Load Supply Voltage, VBB . . . . . . . . . 50 V Output Current, IOUT IN E (Continuous) . . . . . . . . . . . . . ±1.
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