Compact 4.5V to 36V Full-Bridge DC Motor Drivers
Description
EVALUATION KIT AVAILABLE
MAX14870/MAX14872
Compact 4.
5V to 36V Full-Bridge DC Motor Drivers
General Description
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 useradjustable 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.
The MAX14870/MAX14872 are available in a 12-pin (3mm x 3mm) TDFN-EP package and operate over the -40°C to +85°C temperature range.
Benefits and 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 • 280mW (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...
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