Product description: TB9051FTG - single channel motor controller 28V/2,6A - Pololu 2997
The modulebased on theTB9051FTGchip allows you tocontroloneDC motor. The motor can be supplied with voltagefrom 4.5V to 28Vwith continuous current up to 2.6A, momentary (for a few seconds) up to 5A. We recommend reading theTB9051FTGdocumentation before use.
Pinouts of one-channel controller
| PIN | Description |
|---|---|
| Vin | Motor supply voltage from 4.5 V to 28 V. It has protection against polarity change of supply voltage. |
| GND | System ground potential. |
| VM | Output providing access to the motor power supply after reverse polarity protection. It can be used to power other components of the system. |
| OUT1 | Outputs - to connect the motor leads. |
| OUT2 |
Outputs - to connect the motor leads. |
| VCC | Logic voltage - 5 V. |
| OCC | In case of overcurrent, the controller is switched off. By default in low state. If it is in high state it will automatically try to resume operation after a short time interval. |
| EN | When in the low state, the OUT1 and OUT2 outputs are set to the high impedance state. Inverted Inverted PWM can be applied to this pin(When EN is in the high state and PWM1 or PWM2 in the high state).Default is in the low state. |
| ENB | When it is in high state,OUT1 and OUT2 outputs are set to high impedance state.PWM can be applied to this pin(When ENB is in low state and PWM1 or PWM2 in high state).Default inhighstate. |
| PWM1 | Control input for OUT1. Default is low. |
| PWM2 | The control input for OUT2. Default low. |
| OCM | Current monitoring output, pin provides an analog feedback voltage of approximately 500 mV per amplifier. |
| DIAG | Error diagnostics output. goes low when errors occur or the controller is disabled by EN or ENB. |
Connecting the controller with a DC motor
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Table for PWM1 + PWM2 mode |
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| Input | Output | Operation mode | ||||
| EN | ENB | PWM1 | PWM2 | OUT1 | OUT2 | |
| 1 | 0 | PWM | 0 | PWM(H/L) | L |
Forward speed/brake speed at the speed specified: PWM % |
| 1 | 0 | 0 | PWM | L | PWM(H/L) |
Reverse/Brake at the speed specified: PWM % |
| 1 | 0 | 0 | 0 | L | L | Stop, outputs connected to ground |
| 1 | 0 | 1 | 1 | L | L | |
| 0 | X | X | X | Z | Z | Free runningOutputs disconnected |
| X | 1 | X | X | Z | Z | |
|
Table for PWM1 + PWM2 + EN mode |
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| Input | Output | Operation mode | ||||
| EN | ENB | PWM1 | PWM2 | OUT1 | OUT2 | |
| PWM | 0 | 1 | 0 | PWM(H/Z) | PWM(L/Z) |
Forward speed/Free speed at the speed specified: PWM % |
| 0 | 1 | PWM(L/Z) | PWM(H/Z) |
Reverse speed/Free speed at the speed specified: PWM % |
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| 0 | X | X | X | Z | Z | Free runningOutputs disconnected |
| X | 1 | X | X | Z | Z | |
Scheme of the system
The circuit includes thecontrollerand the necessary passive elements for its proper operation. The electronic schematic is available on the drawing below.
Technical specifications of the controller from Polol
- Single-channelmotorcontroller
- Supply voltage of the motor: from 4.5 to 28 V
- Output current: 2.6 A (5 A momentary)
- Automatic current limitation function helps prevent overheating by gently reducing the voltage instead of abruptly shutting down
- Under-voltage, short-circuit and overheat protection
- Protects against polarity reversal of the supply voltage
- Dimensions: 25.4 x 25.4 mm
Useful links |
