A5950: DC Motor Driver

Description

Designed for pulse-width-modulated (PWM) control of DC motors, the A5950 is capable of peak output currents up to ±3 A and operating voltages from 5.5V to 40 V. DC motors are controlled using standard PHASE and ENABLE signals to permit forward, reverse, coast and brake mode operation. Fast or slow current decay is selected via the MODE pin.

The A5950 includes a fixed off-time adjustable PWM regulator for current control. Motor current/torque can be monitored with the current to voltage AIOUT output. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.

Internal circuit protection includes overcurrent protection, motor lead short to ground or supply, thermal warning and thermal shutdown with hysteresis, undervoltage lockout, and crossover-current protection. A diagnostic open drain output (FAULTn) is available.

The A5950 is supplied in a low-profile 4 mm × 4 mm 16-contact QFN (suffix “EU”) package with wettable flank option (suffix “-P”), or a 16-lead eTSSOP (suffix “LP”), all three with exposed power tab for enhanced thermal performance.

AEC-Q100 Grade 0 qualified automotive grade version (A5950K) is available.

Top Features

  • Overcurrent protection (OCP)
  • Motor lead short-to-ground protection
  • Motor lead short-to-battery protection
  • Motor short protection
  • Low-power standby mode
  • Fault output
  • Adjustable current limit option
  • Current-to-voltage output
  • Synchronous rectification – high-side
  • Internal UVLO
  • Crossover-current protection
  • Thermal warning and shutdown function
  • AEC-Q100 Grade 0 qualified – K version
  • Automotive Temperature Range: A5950KEUSR-J -40°C to 125°C
  • Automotive Temperature Range: A5950KLPSR-T -40°C to 125°C

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A5950GEUSR-T 16-lead QFN/MLP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5950GLPTR-T 16-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5950KEUSR-J 16-lead QFN/MLP -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A5950KLPTR-T 16-lead TSSOP -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
APEK5950KEU-01-WO DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Check
Distributor Stock
APEK5950KLP-01-WO DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.