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4.5V to 36V Full-Bridge DC Motor Driver

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

Product Details

Key Features

Parametric specs for DC Motor Drivers
Peak Motor Current (A) 2.8
VSUPPLY (V) (min) 4.5
VSUPPLY (V) (max) 36
Total RON (mΩ) (typ) 334
ISUPPLY (mA) (typ) 1
ICC (Shutdown) (µA) (max) 10
Direction Control DIR
Current Regulation 25% Ripple
External
Fast
Internal
Slow
Internal CR Reference Yes
Oper. Temp. (°C) -40 to +85
Package/Pins TSSOP/16
Budgetary
Price (See Notes)
2.01
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Simplified Block Diagram

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Parameters

Parametric specs for DC Motor Drivers
Peak Motor Current (A) 2.8
VSUPPLY (V) (min) 4.5
VSUPPLY (V) (max) 36
Total RON (mΩ) (typ) 334
ISUPPLY (mA) (typ) 1
ICC (Shutdown) (µA) (max) 10
Direction Control DIR
Current Regulation 25% Ripple
External
Fast
Internal
Slow
Internal CR Reference Yes
Oper. Temp. (°C) -40 to +85
Package/Pins TSSOP/16
Budgetary
Price (See Notes)
2.01

Key Features

  • 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

Applications/Uses

  • Industrial Automation
  • Printers and Scanners
  • Vending and Gaming Machines

Description

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.

Simplified Block Diagram

MAX14871: Typical Operating Circuit MAX14871: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .