DC-Motor Driver Reduces Design Complexity

Designed for pulse-width-modulated (PWM) control, the A5950 dc-motor driver is capable of peak output currents up to ±3A and operating voltages up to 40V. Input terminals enable speed control, direction, and torque via external PWM control signals. Synchronous rectification control circuitry lowers power dissipation during PWM operation. Circuit protection includes over-current, motor lead short to ground or supply, thermal shutdown with hysteresis, under-voltage monitoring of VBB, and crossover-current protection. Diagnostic features include an analog output that can be used to monitor the current through the external sense resistor and an open drain FAULTn output. The A5950 comes in a 4 mm x 4 mm, 16-contact QFN (suffix “EU”) package with wettable flank option (suffix “-J”), or a 16-lead eTSSOP (suffix “LP”), both with exposed power tab for enhanced thermal performance. Pricing in quantities of 1,000 is:

  • A5950KLPSR-T:       Automotive grade 16L eTSSOP                               $0.924
  • A5950KEUSR-J:       Automotive grade 16L eQFN w/ wettable flank      $0.882
  • A5950GLPSR-T:       16L eTSSOP                                                              $0.830
  • A5950GEUSR-T:      16L eQFN                                                                  $0.809 

For more details and a datasheet, go to http://www.allegromicro.com/en/Products/Motor-Driver-And-Interface-ICs/Brush-DC-Motor-Drivers/A5950.aspx


Allegro MicroSystems

Worcester, MA