DCM Boost PFC for High Brightness LED Driver Applications

Interleaved Dcm Single-stage Pfc Converter with Reduced Emi and Boost Inductor Sizes

Buck-Boost LED Driver Using the PIC16F785 MCU

• The on-chip op amp of the PIC16F785 is used to amplify the voltage across the current sensing resistor. This allows a much smaller sensing resistor to be used and reduces power dissipation. • The PIC16HV785 device can be used, which eliminates the requirement for an external 5V regulator when operating from higher supply voltages. • This application has unused analog resources which could be ...

Three Level Boost PFC Converter for High Voltage AC-DC Applications

In the present situation, the evolution of growing in of computers, laptops, uninterrupted power supplies, telecom and biomedical equipment has become overpowering. Hence the utilization of such equipment results high power consumption and small power density which provided a large market to Distributed Power System (DPS). Power conditioning, typically rectification is essential usually for ele...

Analysis and Design of the Integrated Double Buck-Boost Converter as a High-Power-Factor Driver for Power-LED Lamps

The IDBB converter features just one controlled switch and two inductors and is able to supply a solid-state lamp from the mains providing high power factor and good efficiency. And with a careful design of the converter the filter capacitances can be made small enough so that film capacitors may be used. Thus the converter mean time between failures can be made as high as that of the solid-sta...

A low-power, LED-based, high-brightness anomaloscope

Color matches made with a Nagel anomaloscope are used in the differentiation of color vision deficiencies. When these color matches are made over a wide range of retinal illuminances, the changes in the color match provide information about the regeneration kinetics and the absorption spectra of the middle- and long-wavelength cone photopigments. These steady-state color matches vary with a var...