14 - 16 March 2017 // Nuremberg, Germany

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Zoom product LOGO_Compact 4.5V to 36V Full-Bridge DC Motor Drivers

Compact 4.5V to 36V Full-Bridge DC Motor Drivers

LOGO_Compact 4.5V to 36V Full-Bridge DC Motor Drivers

Compact 4.5V to 36V Full-Bridge DC Motor Drivers

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The MAX14870/MAX14872 motor drivers provide a small, low-power and simple solution for driving and controlling brushed DC motors and relays with voltages between 4.5V and 36V. Very low driver on-resistance reduces power dissipation.

These drivers feature a charge-pump-less design for reduced external components and low supply current. Integrated fast-decay current regulation allows user-adjustable peak startup motor currents and requires minimal external components.

A separate voltage-sense input (SNS) reduces current sensing errors due to parasitic trace resistance.

The MAX14870/MAX14872 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 MAX14870 has PWM and direction-control inputs, while the MAX14872 has forward and reverse inputs for direction control. See the Function Tables in the data sheet.

The MAX14870 and MAX14872 are available in a 12-pin (3mm x 3mm) TDFN-EP package and operate over the -40°C to +85°C temperature range.

MAX14870, MAX14872: Typical Operating Circuit MAX14870, MAX14872: Typical Operating Circuit Enlarge+

Key Features

  • Small Package Handles High Power and Reduces Footprint Circuit Size
  • Up to 2.5A Peak Motor Current
  • Space-Saving TDFN-EP (3mm x 3mm) Package
  • Flexible 4.5V–36V Supply Enables Longer Runtime on Batteries
  • Low Power Consumption Runs Cooler and Longer
  • 280mΩ (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
  • Integrated Protection Provides Robust Driving Solution
  • Short-Circuit-Protected Drivers
  • Thermal-Shutdown Undervoltage Lockout
  • Diagnostic Active-Low FAULT Output
  • -40°C to +85°C Temperature Range

±5ppm, I2C Real-Time Clock

LOGO_±5ppm, I2C Real-Time Clock

5A, 2.4V to 5.5V Input, High-Efficiency Power Module

LOGO_5A, 2.4V to 5.5V Input, High-Efficiency Power Module



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