Brushed DC Motor Driver with Integrated Current Regulation
The highly efficient DC brushed motor driver including an onboard shunt resistor for current regulation presented here is built using the DRV8251 chip. The operating supply voltage range of the project is 4.5V to 48V DC and the default output current capability is 2.1A. A trimmer potentiometer PR1 is provided to adjust the current regulation threshold. The device includes under-voltage lockout (UVLO), Latched overcurrent protection (OCP), and thermal shutdown (TSD). Output is disabled and latched when over current/stall current condition occurs. For direction control of the motor use IN1 and IN2 as logic inputs and for speed control these inputs can be connected to a PWM source with duty cycle 0 to 100% and frequency 20Khz.
Connections and Other details
- CN1: Pin 1 Output 1, Pin 2 Output 2 (Motor Connections)
- CN2: Pin 1 VCC 5V DC for V-REF, Pin 2 Input 1 PWM or Logic, Pin 3 Input 2 PWM or Logic, Pin 4 GND
- CN3: Pin 1 VM Motor Supply 4.5V to 48V DC, Pin 2 GND
- LED: D2, D3 Motor Direction Indicator
- LED: D1 Power LED
- PR1 Trimmer Potentiometer: Current Regulation Threshold Adjust
Features
- 5V to 48V operating supply voltage range
- VCC Supply 5V DC 10mA (V-Ref = 4V for 2.1A Adjust Using PR1)
- Load Current Up to 2.1Amp
- Motor Trip Point 1.9 Amp
- Pin-to-pin, RDS (on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
- PWM control interface, PWM Frequency 20Khz (Range Up to 200Khz)
- Supports 1.8-V, 3.3-V, and 5-V logic inputs, IN1 and IN2
- Integrated current regulation
- Low-power sleep mode
- Integrated protection features, VM under-voltage lockout (UVLO), Latched overcurrent protection (OCP)
- Thermal shutdown (TSD)
- PCB Dimensions 55.25 x 37.47mm
- 4 x 3mm Mounting Holes
Video
https://www.youtube.com/watch?v=r6nJbBUHoXM
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The highly efficient DC brushed motor driver including an onboard shunt resistor for current regulation presented here is built using the DRV8251 chip. The operating supply voltage range of the project is 4.5V to 48V DC and the default output current capability is 2.1A. A trimmer potentiometer PR1 is provided to adjust the current regulation threshold. The device includes under-voltage lockout (UVLO), Latched overcurrent protection (OCP), and thermal shutdown (TSD). Output is disabled and latched when over current/stall current condition occurs. For direction control of the motor use IN1 and IN2 as logic inputs and for speed control these inputs can be connected to a PWM source with duty cycle 0 to 100% and frequency 20Khz.
Connections and Other details
- CN1: Pin 1 Output 1, Pin 2 Output 2 (Motor Connections)
- CN2: Pin 1 VCC 5V DC for V-REF, Pin 2 Input 1 PWM or Logic, Pin 3 Input 2 PWM or Logic, Pin 4 GND
- CN3: Pin 1 VM Motor Supply 4.5V to 48V DC, Pin 2 GND
- LED: D2, D3 Motor Direction Indicator
- LED: D1 Power LED
- PR1 Trimmer Potentiometer: Current Regulation Threshold Adjust
Features
- 5V to 48V operating supply voltage range
- VCC Supply 5V DC 10mA (V-Ref = 4V for 2.1A Adjust Using PR1)
- Load Current Up to 2.1Amp
- Motor Trip Point 1.9 Amp
- Pin-to-pin, RDS (on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
- PWM control interface, PWM Frequency 20Khz (Range Up to 200Khz)
- Supports 1.8-V, 3.3-V, and 5-V logic inputs, IN1 and IN2
- Integrated current regulation
- Low-power sleep mode
- Integrated protection features, VM under-voltage lockout (UVLO), Latched overcurrent protection (OCP)
- Thermal shutdown (TSD)
- PCB Dimensions 55.25 x 37.47mm
- 4 x 3mm Mounting Holes
Video
https://www.youtube.com/watch?v=r6nJbBUHoXM
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