J1939 H-Bridge Module


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An H-bridge is a circuit for reversing DC loads in electric equipment like motors in DC cylinders or linear actuators. The simplest form of DC motor is a two-wire configuration, which is the most cost-effective type for OEMs. An H-bridge circuit provides motor control in the form of a simple circuit with four switches, either transistors or metal-oxide-semiconductor field-effect transistors (MOSFETs). The switches in the H-bridge are arranged strategically to control the current flow direction through the load.

SMP Trombetta’s J1939 H-bridge module is ideal for operating in harsh conditions. We have over a century of experience delivering motor control and thermal management solutions for vehicles in various sectors. Here we will explore the features of the J1939 H-bridge module and the applications and benefits of using an H-bridge module for DC motor control.

J1939 H-Bridge Module Features

The J1939 H-bridge module offers several features that make it an ideal control circuit for DC motors. The module enables control of output direction, frequency, duty cycle, and peak current via CAN. Operating voltages of 12V to 24V are available with a max output current of 20A. It comes with built-in short circuit and overload protection along with reverse battery and voltage transient protection. Other specifications are:

  • PWM range between 5Hz and 5000Hz
  • Operating temperatures between -40 °C and 105 °C
  • Duty cycle increments of 0.1%
  • IP67-rated for waterproofing
  • Auto baud rate detection between 125Kbps and 1Mbps
  • LED output polarity status
  • “Poka-yoke” or fail-proof mounting