H-bridge motor controller power supply circuit

The H-bridge circuit is a full bridge DC-to-DC converter allowing operation of a brushed DC motor (48 V max, 12 V min, 5 A max). The control circuit operates with input voltages from 12 - 48 V for motors up to 250 W. The key feature of this design is that all electronic functions are designed with automotive qualified Nexperia discretes, MOSFETs and logic components (cost-effective, no microcontroller or software needed). In addition this H-bridge motor controller PCB allows the user to choose between three Nexperia MOSFET package options (LFPAK33, LFPAK56D or LFPAK56).

PCB top view

The H-bridge motor controller power supply circuit comprises of:

  • DC input stage with transient overvoltage and reverse voltage protection
  • 12 V output DC-to-DC buck converter stage
  • 5 V output linear regulator (for logic ICs) with status LED

Documentation and files

Full schematics, Gerber files and BOM list available for download. Simply enter your information below to receive the zip files.

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