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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).
  • How to Select a PWM Controller
    In high voltage applications where a lower output voltage is required, designers have traditionally relied on modules that increase system cost, or two stage DC/DC solutions that increase solution footprint and complexity. This white paper looks at the trends influencing narrow on-time point-of-load
  • Multiple PWM Output Soft-Start Controller For Switching Power Supplies
    This Technical Brief describes a microcontroller-based soft-start controller for power supplies in systems with multiple voltages. Sometimes applications have devices with multiple voltage requirements (e.g., core voltages, I/O voltages, etc). The sequence in which these voltages rise is important
  • Interfacing the MCP2122 to the Host Controller
    unit (MCU) as the Host Controller, the signals are the transmitted and received data (TX and Capture/Compare/PWM (CCP) and Timer2 modules RX), the 16XCLK signal and the RESET signal. can be used to generate the 16XCLK signal. This is (R) accomplished using the CCP module in PWM mode. The MCP2122
  • Interfacing Microchip's Fan Speed Controllers to a SPI TM
    Microchip's TC642, TC643, and TC646 are the world's first integrated circuits dedicated for controlling and monitoring fan speed. The new family of fan speed controllers modulate fan speed to compensate for changes in system temperature. This means the fan runs at full speed only when necessary
  • Digital Current Loops and Direct PWM Control
    to provide a very powerful, yet cost-effective, digital current-loop algorithm in its PMAC2 and Turbo PMAC2 line of controllers. There are typically some disadvantages to digital control. First, the fact that the system is "sampled" at discrete intervals, and only one control decision is made per sample
  • Incompatibility of Power Factor Correction Capacitors with AC PWM Drives
    factor as seen by the user's line. A bank of these oil-filled or dry type AC capacitors usually reside in a conspicuously placed metal enclosure nearby the motor. Beware of retrofitting any AC controllers (including VVI and CSI types) to existing induction motors! If the installation is not thoroughly
  • Sensorless Field Oriented Control of PMSM Motors using dsPIC30F or dsPIC33F Digital Signal Controllers
    . They are also electrically less noisy than DC trol algorithms is now a reality thanks to the new motors, since brushes are not used. generation of Digital Signal Controllers (DSCs). An air conditioner, for example, requires fast response Why Use Digital Signal Controllers for for speed changes in the motor

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