Datasheet

supply reverse-protected power to other components in the system, but it
should not be used for high currents. This pin should only be used as an
output.
GND
Ground connection points for logic and motor power supplies. The control
source and the motor driver must share a common ground.
OUTA Output of half-bridge A (connects to one terminal of a DC motor).
OUTB Output of half-bridge B (connects to the other terminal of a DC motor).
PWM LOW
Pulse width modulation input: a PWM signal on this pin corresponds to a
PWM output on the motor outputs.
INA FLOAT Motor direction input A (“clockwise” input).
INB FLOAT Motor direction input B (“counterclockwise” input).
CS
Current sense output. The pin voltage is roughly 210 mV per amp of output
current when the CS_DIS pin is low or disconnected. The current sense
reading is more accurate at higher currents.
ENA/DI
AGA
HIGH
Combination enable input/diagnostic output for half-bridge A. When the
driver is functioning normally, this pin acts as an enable input, with a logical
high enabling half-bridge A and a logical low disabling half-bridge A. When a
driver fault occurs, the IC drives this pin low and half-bridge A is disabled.
This pin is connected to VDD through a pull-up resistor on the board; it must
never be driven high as this will create a short between power and ground in
the event of a fault.
ENB/DI
AGB
HIGH
Combination enable input/diagnostic output for half-bridge B. See the
description of ENA/DIAGA.
CS_DIS LOW
Disables the current sense output, CS, when high. Can be left disconnected in
most applications.
Included Hardware
A 20-pin 0.1″ straight breakaway male header and two 2-pin 5mm terminal blocks are included with
the motor driver as shown in the picture below. You can use the terminal blocks to make your motor
and motor power connections, or you can break off an 8×1 section of the 0.1″ header strip and solder it
into the smaller through-holes that border the four large motor and motor power pads. Note, however,
that the terminal blocks are only rated for 16 A, and each header pin pair is only rated for a combined
6 A, so for higher-power applications, thick wires should be soldered directly to the board.
Soldering the 0.1″ headers to the logic connections enables use with custom cables or solderless
breadboards, or wires can be soldered directly to the board for more compact installations. Motor and
motor power connections should not be made through a breadboard.
The motor driver includes a 47 uF electrolytic power capacitor, and there is room to add additional
capacitors (e.g. to compensate for long power wires or increase stability of the power supply).
Additional power capacitors are usually not necessary, and no additional capacitors are included with
this motor driver.
The two mounting holes are intended for use with #2 screws (not included).