MAX14871:4.5V to 36V Full-Bridge DC Motor Driver

Industry’s Simplest and Most Flexible 4.5 to 36V DC-Brushed Motor Driver

The MAX14871 DC motor driver provides a low-power and simple solution for driving and controlling brushed motors with voltages between 4.5V and 36V. 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 3 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.

  • Drive More Power and Reduce Footprint
    • Up to 2.8A Peak Motor-Current Package
    • Flexible 4.5V–36V Supply Enables Longer Runtime
  • Low Power Consumption Runs Cooler and Longer
    • 334mΩ (typ) Total Bridge On-Resistance
    • 1mA (typ) Supply Current at 30kHz/24V
    • 10µA (max) Standby Current at 12V
  • Simplified Designs Reduces 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
  • 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
MAX14871: Typical Operating Circuit
MAX14871: Typical Operating Circuit
  • 工业自动化
  • 打印机与扫描仪
英文MAX14871.pdfRev 0; 09/2014
Part NumberPeak Motor Current
Total RON
ICC (Shutdown)
Direction ControlCurrent RegulationInternal CR ReferenceOper. Temp.
minmaxtyptypmaxSee Notes
  • 25% Ripple
  • External
  • Fast
  • Internal
  • Slow
Yes-40 to +85TSSOP-EP/16$1.65 @1k
MAX14871.pdf MAX14871
MAX14871.pdf MAX14871