Product description: DRV8256P - 48V/1,9A single channel motor driver - Pololu 4039
A small, single channel DRV8256E motor driver created by Pololu company. The module is powered from 4.5V to 48V. Continuous current per channel is 1.9 A (momentary up to 6.4 A for 1 second). It allows simple control of the motor rotation direction through a two-pin IN/IN interface. The controller is also equipped with protection against reverse polarity, too low voltage, too high current and too high temperature.
DRV8256P single-channel DC motor driver.
Connection of DRV8256P motor controller.Connection of DRV8256P motor driver
The controller supports motors supplied with 4.5 V to 48 V, which must be connected to the VIN pin. In a typical application, it is sufficient to connect the motor direction control lines to IN1/IN2. Both lines are internally pulled up to ground through a resistor. SLEEP pin allows switching the system into low power mode. A low state must be specified to enter sleep mode.
| DRV8256P truth table | ||||
|---|---|---|---|---|
| IN1 | IN2 | OUT1 | OUT2 | OPERATION MODE |
| 0 | 0 | L | L | stop (output connected to ground) |
| PWM | 0 | PWM (H/L) | L | forward speed PWM % braking |
| 0 | PWM | L | PWM (H/L) | Reverse speed PWM % braking |
| 1 | 1 | H | H | stop (output pulled up to VM) |
| Pinout of the DRV8256P controller | ||
|---|---|---|
| Pin | Default state | Description |
| VIN | Input voltage from 4.5 V to 48 V (reverse polarity protection operates up to 40 V). | |
| GND | System ground for motor and logic (controller and motor power ground must be connected). | |
| VM | Pin giving access to the motor power supply after the MOSFET reverse voltage protection operates. It can be used to power other elements of the system with reverse polarity protection. | |
| OUT1 | Motor 1 output. | |
| OUT2 | Motor 2 output. | |
| IN1 | LOW | Control input for OUT1. PWM can be used for control. |
| IN2 | LOW | Control input for OUTy. PWM can be used for control. |
| FAULT | FLOATING | Open-drain, fault output activated by a low state. Pin goes to low state when current or voltage exceeds allowable. Must be pulled up with a resistor to default to the high state. |
| SLEEP | LOW | The SLEEP input causes the controller to go into a low power state when the low state is applied. This pin can also be toggled to clear a locked overcurrent or overtemperature fault. |
| VREF | Current limiting threshold reference voltage. | |
DRV8256P motor controller specifications
- Number of channels: 1
- Supply voltage: 4.5 V to 48 V
- Continuous current per channel: 1.9 A
- Instantaneous current per channel: 6,4 A
- Maximum PWM frequency: 100 Hz
- Minimum logic voltage: 1.8 V
- Maximum logic voltage: 5,5 V
- Reverse polarity protection
- Dimensions: 15.2 x 15.2 mm
- Weight: 0,6 g
Diagram of the DRV8256P controller.
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