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MAX14872：Compact 4.5V to 36V Full-Bridge DC Motor Drivers

Industry’s Smallest 4.5V–36V DC Brushed Motor Drivers/Relay Drivers

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.

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

MAX14870, MAX14872: Typical Operating Circuit Applications/Uses Printers and Scanners Relay Drivers Vending and Gaming Machines

DataSheet

Parametrics

Design kits & evaluation modules

• MAX14870EVKIT

Quality and Environmental Data

• MAX14872.pdf

Ordering Information