MAX14871 DC Motor Driver

Maxim introduces the industry’s simplest and most flexible 4.5 V to 36V DC brushed motor driver

Image of Maxim Integrated's MAX14871 DC Motor DriverMaxim Integrated's MAX14871 DC motor driver provides a low-power and simple solution for driving and controlling brushed motors with voltages between 4.5 V and 36 V. Very low driver on resistance reduces power during dissipation.

The MAX14871 features a charge-pump-less design for reduced external components and low supply current. Integrated current regulation allows user-defined peak startup motor currents and requires minimal external components.

The MAX14871 includes three modes of current regulation: fast decay, slow decay, and 25% current ripple modes. Current regulation based on 25% ripple simplifies the design and enables regulation independent of motor characteristics. A separate voltage sense input (SNS) reduces current-sensing errors due to parasitic trace resistance.

The MAX14871 features shoot-through protection and internal free-wheeling diodes that absorb inductive motor currents. Driver outputs are short-circuit-protected from shorts to ground, to the supply, and between M1 and M2. An active-low FAULT-output signals thermal overload and overcurrents during fault conditions.

The MAX14871 is available in a 16-pin TSSOP-EP package and operates over the -40°C to 85°C temperature range.

  • Low power consumption runs cooler and longer
    • 334 mΩ (typ) total bridge on-resistance
    • 1 mA (typ) supply current at 30 kHz/24 V
    • 10 µA (max) standby current at 12 V
  • Integrated protection provides robust driving solutions
    • Short-circuit-protected drivers
    • Thermal shutdown undervoltage lockout
    • Diagnostic active-low FAULT output
    • -40°C to +85°C temperature range
  • Simplified designs reduce time to market
    • Charge-pump-less architecture
    • Current regulation only requires a sense resistor
    • Current-sense input simplifies PCB layout
    • Internal/external VREF for current regulation
    • Fast/slow/25% ripple current regulation modes 
  • Drive more power and reduce footprint
    • Up to 2.8 A peak motor-current package
    • Flexible 4.5 V to 36 V supply enables longer runtime 


ImageManufacturer Part NumberDescriptionMotor Type - StepperAvailable Quantity
Published: 2015-05-26