L6203 PWM: Pulse Width Modulation

The L6203 motor controller has two input pins for feeding the pulse-width modulation (PWM) signal. Pin 5 labelled "In 1" is for feeding the PWM signal, whilst pin 7 labelled "In 2" is for selecting the direction of rotation of the motor shaft. This signal is simply logic 1 for forward and logic 0 for reverse.

The maximum commutation frequency of this IC is 100 kHz; however, for inductive loads the value of around 30 kHz works best.

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