Datasheet

A 0.1″ shorting block (for optionally supplying shield power to Arduino) is also included.
You can solder the terminal blocks to the six large through-holes to make your motor and motor power
connections, or you can break off a 12×1 section of the 0.1″ header strip and solder it into the smaller
through-holes that border these larger holes. You can also solder wires directly to the board.
When not using this board as an Arduino shield, you can solder the 0.1″ headers to the logic connections
along the left side of the board to enable use with custom cables or solderless breadboards, or you can
solder wires directly to the board for more compact installations. Note that motor and motor power
connections should not be made through a breadboard.
The mounting hole is intended for use with #4 screws (not included).
An Arduino is not included.
Real-World Power Dissipation Considerations
Each MC33926 motor driver IC has a maximum continuous current rating of 5 A. However, the actual
current it can deliver depends on how well you can keep it cool. The shield’s printed circuit board is
designed to draw heat out of the motor driver chips, but performance can be improved by adding heat
sinks.
Unlike other H-Bridges, the MC33926 has a feature that allows it to gracefully reduce current as the
current exceeds 5 A or as the chip temperature approaches its limit. This means that if you push the chip
close to its limit, you will see less power to the motor, but it might allow you to avoid a complete
shutdown.
We tested the shield at room temperature with no forced air flow or heat sinks. In our tests, the shield
was able to deliver 5 A to both channels simultaneously for 10 s before the thermal protection started
reducing the current. The shield delivered 4 A on both channels for 37 s, and at 3 A it was able to
operate continuously for over 10 minutes without triggering current limiting or thermal protection.
Our tests were conducted at 100% duty cycle; PWMing the motor will introduce additional heating
proportional to the frequency.