UC3844 base motor speed controller

UC3844 is popular current mode controller which is commonly found on DC-to-DC converter circuits and switch mode power supplies. This motor speed controller is also based on UC3844 and it is specifically design to drive 20V – 24V DC motors.

UC3844 base motor speed controller

In this given configuration UC3844 produces (approx.) 50kHz to 240kHz PWM output and this range can be adjust by changing the value of C2 timing capacitor. As per the datasheet UC3844 is capable to produce PWM output frequency up to 1MHz.

This circuit is quiet sensitive to the noises, and to get the accurate output construct this circuit on PCB. As per our observations long wires on oscillator circuit may change the stability of the output signal.


For more detail: UC3844 base motor speed controller

Current Project / Post can also be found using:

  • esr lcd 3315/3310
  • uc3844 based projects
  • uc3844 with microcontroller
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