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  • A Digital Constant Current Power LED Driver
    AN1138 A Digital Constant Current Power LED Driver drive current for this type of LED would be 350 mA and Author: Stephen Bowling a typical forward voltage would be 3.5V. Secondly, we Microchip Technology Inc. will assume that the circuit input voltage is 12V. The inductor value will be chosen
  • Increase the Number of Series White LEDs with a "Constant Voltage" OVP Circuit
    A unique over-voftage protection (OVP) circuit is presented for use with the AAT123I, an inductive boast con. stant current wtute LED driver.. The circuit allows transition from constant current to constant voilage at the. OVP threshold, maintaining the programmed output voltage and current during
  • Technical Article: Constant Voltage Transformer Operation
    The CVT (ferro) uses the unique principle of ferroresonance: operation of a transformer in the region of magnetic saturation. When the iron core of a transformer is in saturation, relatively large changes in winding current results in very small changes in magnetic flux. Winding current
  • Circut Ideas: LED driver lights three LED strings and provides constant voltage supply
    of producing regulated electrical power. This eliminates the need for extra circuitry otherwise used with a separate power supply. In the accompanying diagram, an LT3476 drives three constant-current RGB LED strings. Its fourth channel serves as a constant-voltage source. A typical application
  • Voltage-dependent Dynamic FRET Signals from the Transverse Tubules
    was demonstrated. to correspond to the voltage-dependent translocation of the charged acceptors, which manifest as nonlinear. components in current records. For DPA, both electrical and QRET data were predicted by radial cable model. simulations in which the maximal time constant of charge translocation
  • High Voltage, Life Critical, Glove Inflator Redesign
    A prospective customer approached the Field team with a request for a quote on a fastener. Prior to quoting the fastener, Field requested to walk the customer's production floor to review the application of the fastener. The current design required the operator to count out six stainless steel
  • Optimizing Low Voltage Buck DC/DC Converter Efficiency
    by the control circuitry quiescent current. In some instances, lnjit load noise requiremenl:s may supercede efficiency requirements. For Ihis type of appli. cation, constant frequency PWM may be necessary for all load conditions.
  • What type of LED driver or power supply do I need?
    Conventional AC-DC power supplies and DC-DC converters provide an output that is regulated to provide a "constant-voltage." However, LEDs work most efficiently and safest with a "constant-current" drive. As a result, many new devices have been developed to provide this type of LED drive. LED power
  • Thermal Considerations for Driving LEDs in Automotive Applications
    This application note discusses the temperature and power considerations for devices operating from typical currents of 20 mA to 30 mA in automotive applications where a constant current is needed to maintain luminosity under varying voltage conditions.
  • Tips for selecting relays
    Relays from Magnecraft & Struthers-Dunn come in a variety of shapes, sizes, and ratings including socket or DIN-rail mountable versions. Capacitive loads want to remain at constant voltage. When the contacts are closed, a current surge can weld the contacts together. Inductive loads want to keep

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