Using the driver in single-channel mode – Pololu Dual VNH5019 User Manual
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7. Using the Driver in Single-Channel Mode
The dual VNH5019 motor driver shield uses two VNH5019 motor driver ICs to enable independent control of two
bidirectional brushed DC motors, and each motor channel by itself is capable of delivering up to 12 A of continuous
current while tolerating brief current spikes up to 30 A. If you need more power than this, however, you can combine
the two motor channels into a single, doubly-powerful channel that can deliver up to a continuous 24 A (60 A
peak) to one brushed DC motor. Page 23 of the
(629k pdf) recommends accomplishing this by using each of the two motor drivers as a half-bridge.
The connections shown in the following diagram turn motor driver M1 into a new “half-bridge A” and motor driver
M2 into a new “half-bridge B”:
Using the dual VNH5019 motor driver shield to drive a single, more powerful motor.
• Effectively create a new INA pin by connecting M1INA and MI1B to the same digital output.
• Effectively create a new INB pin by connecting M2INA and M2INB to another digital output.
• Effectively create a new PWM pin by connecting M1PWM and M2PWM to the same PWM output.
• Effectively create a new OUTA pin by connecting one motor terminal to both M1A and M1B motor outputs.
• Effectively create a new OUTB pin by connecting the other motor terminal to both M2A and M2B motor
outputs.
The motor driver truth table for this new setup then becomes:
Pololu Dual VNH5019 Motor Driver Shield User’s Guide
© 2001–2014 Pololu Corporation
7. Using the Driver in Single-Channel Mode
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