Pololu - Dual TB9051FTG Motor Driver for Raspberry Pi (Assembled)
This add-on board enables a Raspberry Pi B+, Pi A+, Pi 2 or Pi 3 to drive a pair of brushed DC motors. Its dual TB9051FTG motor drivers operate from 4.5 V to 28 V and can deliver a continuous 2.6 A (5 A peak) per motor. The default pin mappings make it easy to get started using our provided software, but the board also exposes most of the driver chips’ I/O pins for more specialized applications. This version ships fully assembled with connectors soldered in.
This motor driver expansion board and its corresponding Python library make it easy to control a pair of bidirectional, brushed DC motors with a compatible Raspberry Pi (Model B+ or newer), including the Pi 3 Model B+ and Model A+. The expansion board uses a pair of Toshiba TB9051FTG motor drivers, which operate from 4.5 to 28 V and can deliver a continuous 2.6 A per channel (up to 5 A per channel for a few seconds). Other features include a reverse battery protection circuit and logic gates that reduce the number of I/O pins required to control the driver ICs effectively. It is available either as a partial kit, with a female header and terminal blocks included but not soldered in, or fully assembled with these connectors soldered to the PCB.
The board’s default configuration uses six GPIO pins to control the motor drivers, making use of the Raspberry Pi’s hardware PWM outputs, and it uses two additional pins to read status outputs from the drivers. However, the pin mappings can be customized if the defaults are not convenient, and other control inputs and outputs of the TB9051FTG ICs are accessible on the board for more advanced applications.
The board matches the Raspberry Pi HAT (Hardware Attached on Top) mechanical specification, although it does not conform to the full HAT specifications due to the lack of an ID EEPROM. (A footprint for adding your own EEPROM is available for applications where one would be useful; pull-ups on SDA, SCL, and WP are provided.) It is not practical to use this expansion board with the original Raspberry Pi Model A or Model B due to differences in their pinout and form factor.
- Dual-channel H-bridge motor driver in the form factor of a Raspberry Pi expansion board
- Wide operating voltage range: 4.5 V to 28 V
- Output current: 2.6 A continuous (5 A peak) per motor
- Automatic current chopping feature helps prevent overheating by gracefully reducing power rather than abruptly shutting down
- PWM operation up to 20 kHz, which is ultrasonic and allows for quieter motor operation
- Motor indicator LEDs show what the outputs are doing even when no motor is connected
- Board can optionally power the Raspberry Pi base through added regulator like the D24V10F5 or D24V22F5 (not included)
- Python library makes it easy to get started using this board as a motor driver expansion board
- GPIO pin mappings can be customized if the default mappings are not convenient
- Remaining motor driver pins are exposed for advanced use
- Exposed solderable ground pads below the driver ICs on the bottom of the PCB
- Reverse-voltage protection on motor supply
- Robust drivers:
- Transient operation (< 500 ms) up to 40 V
- Under-voltage lockout and protection against over-current/short-circuit and over-temperature
- Active-low error output indicates over-current, over-temperature, under-voltage, or VCC over-voltage condition
- Prototyping space for easier/cleaner construction of custom circuits
Details for item #2762
This version of the motor driver is fully assembled, with a 2×20-pin 0.1″ female header (for connecting to the Raspberry Pi’s 40-pin GPIO header) and a six-pin strip of 5 mm terminal blocks (for motor and power connections) soldered in. (See item #2761 for a kit version with connectors included but not soldered in.)
The motor driver ships with a set of four M2.5 standoffs (11 mm length), screws, and nuts that can be used to secure the board to the Raspberry Pi at the proper height for the GPIO connector. If you decide not to use the standoffs, be careful not to allow the motor and power connections to short against the Raspberry Pi’s HDMI connector.
Shorting blocks and 0.1″ male headers (not included) can be used to make some of the more advanced optional modifications to the board, such as remapping the control pins.
A Raspberry Pi is not included.
(Pololu product 2762)
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