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  • Dimming Power LEDs Using a SEPIC Converter and MCP1631 PIC Attach PWM Controller (.pdf)
    Programmable Current Source Reference Design. A Microchip MCP1631 PWM controller and a low-cost PIC16F616 microcontroller are used to manage a SEPIC (Single Ended Primary Inductive Converter) powertrain. The SEPIC topology is then used to drive and dim Light Emitting Diodes (LEDs).
  • Application Note: Driving Color RGB LEDs with the AAT3123
    to 20mA maximum to each of the three red, green, and blue LEDs in a common anode configuration. Color balance and intensity is then controlled via PWM signals to MOSFET switches connected to each LED cathode. Refer to the following application circuit (Figure 1): RGB LEDs have differing forward voltages
  • A Digital Constant Current Power LED Driver
    (64 steps) of duty well for LED applications because the LED presents a cycle resolution at 125 kHz. If this control resolution is constant load to the power stage. Therefore, the not sufficient, the PWM frequency can be lowered or controller does not need to make frequent adjustments. the MCU can
  • Care and Feeding of the PIC16C74 and Its Peripherals
    A/D value may float around. The second trimpot is only used to show a method of changing A/D input pins. If you are using the PICDEM 2 board, then the LED and a current limiting resistor must be connected to the PWM output. When the program is run, the RS-232 terminal will display two A/D values
  • Using a PIC (R) Microcontroller for DMX512 Communication
    mechanism. Hence, it is PWM module to control the brightness of a LED. not suitable for any safety critical application. Data is transmitted at 250k baud rate using a physical interface BACKGROUND compatible with the RS-485 transmission standard

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