Pololu Dual MC33926 - Manual (Page 3)

Pololu dual MC33926 motor
driver shield, assembled and
connected to an Arduino
Leonardo.
Pololu dual MC33926 motor
driver shield for Arduino, bottom
view with board dimensions.
1.a. Features
• Wide operating voltage range: 5 – 28 V
1
• Output current: 3 A continuous (5 A peak
2
) per motor
• Inputs compatible with both 5 V and 3.3 V systems
• PWM operation up to 20 kHz, which is ultrasonic and allows for
quieter motor operation
• Current sense voltage output proportional to motor current (approx.
525 mV/A)
• Motor indicator LEDs show what the outputs are doing even when
no motor is connected
• Can be used with an Arduino or Arduino clone (through shield
headers) or other microcontroller boards (through 0.1″ header along the
left side)
• When used as a shield, the motor power supply can optionally be
used to power the Arduino base as well
• Arduino pin mappings can be customized if the default mappings
are not convenient
• Arduino library [http://github.com/pololu/dual-mc33926-motor-shield]
makes it easy to get started using this board as a motor driver shield
• Reverse-voltage protection on motor supply
3
• Robust drivers:
◦ Transient operation (< 500 ms) up to 40 V
◦ Over-current limiting via internal PWM
◦ Over-temperature shutdown and hysteresis
◦ Under-voltage shutdown
◦ Output short-to-ground and short-to-Vcc protection
1
The board supports transient (< 500 ms) operation up to 40V. Operation from 5-8 V reduces maximum
continuous output current (driver performance is derated in this range).
2
Internal peak-current limiting gracefully reduces the output power at load currents above 6.5 A ± 1.5 A. See
the MC33926 datasheet [http://www.pololu.com/file/download/MC33926.pdf?file_id=0J233] (1MB pdf) for more
information.
3
There is no reverse-voltage protection on the logic supply.
Pololu Dual MC33926 Motor Driver Shield User's Guide © 2001–2013 Pololu Corporation
1. Overview Page 3 of 24