Dual motor drive วงจร Drive Motor 5.9V to 40V 17A

dual motor drive is composed of a single H- bridge driver IC plus four external N- channel MOS tube.It is compact , supports 5.9V to 40V wide voltage input, continuous current can reach 17A , support 100%pulse width modulation. Module through the direction of the DIR pin and speed PWM pin to achieve the motor is positive, reverse and speed control.

   The control terminal supports 1.8V - 5V logic input, and the driver IC integrates the PWM current regulation function, thus limiting the motor surge current. When the SLP pin is low, the MD01 drive module can enter the low power mode, resulting in a lower quiescent current loss of approximately 9uA .

Operating voltage: 5.9 - 40V

Working current: 17A

Logic input: 1.8V , 3.3V , 5V ( max )

PWM frequency: 100kHz

Current detection: 50mV / A CS pin

Reverse voltage protection: none ( VM and GND can not be reversed)

Undervoltage protection: Yes

Short circuit protection: Yes

Control truth table

  SLP pin default low, the normal use of the SLP pin need to set high, you can directly connected to the logic power of the positive, but also through the microcontroller IO port control. (Two logical values ​​are the same)

Note: The table H , L , respectively, said high and low level, the logic drive part of the maximum input voltage shall not exceed 5.5V . 1.8V , 3.3V , 5V system are applicable.

PWM frequency
 motor drive up to 100KHz the PWM frequency is to be noted that the switching loss of the driving circuit will be proportional PWM frequency. So in general, we recommend using a 10 - 30KHz drive motor.

Current detection and current limiting

  motor driver current detection pin for the CS , the output voltage is proportional to the motor side current. Approximately 50mV / A , plus 50mV about offset, that is, when both ends of the motor current is zero, CS voltage pin is approximately 50mV ; when the CS terminal current reaches 10A when, V CS  = 50mV / A * 10 + 0.05V = 0.55V . It should be noted that the current detection function will not detect the peak current generated by the motor starting and stopping instantaneously, only when the drive is operating in positive / reverse mode.

The drive current limit is achieved by the V ref resistor , which is set to 30A by default .