An E-capless AC-DC CRM Flyback LED Driver with Variable On-time Control

Design Guideline of Single-Stage Flyback AC-DC Converter Using FAN7530 for LED Lighting

Design Guideline of Single-Stage Flyback AC-DC Converter Using FAN7530 for LED Lighting

This application note describes the single-stage power factor correction (PFC) and presents the design guidelines of a 75W universal-input, single-stage PFC for LED lighting applications. Flyback converter topology controlled by the critical conduction mode control IC, FAN7530 is applied and several functions; such as CV/CC mode feedback circuits, cycle-by-cycle current limit, soft-starting fun...

Design of Flicker-Free Electrolytic Capacitor-Less Ac-Dc Led Driver

The life of LED driver is mainly dependent on the component used in it. Elimination of electrolytic capacitor is done so that the life of LED driver will increase, if an ac-dc LED driver with power factor correction control is used than the output will be a pulsating current for driving the LED. Since the pulsating current will introduce light flicker that varies double the power line frequency...

An Overview of the AC-DC and DC-DC Converters for LED Lighting Applications

High-Brightness Light Emitting Diodes (HB-LEDs) are considered the future trend in lighting not only due to their high efficiency and high reliability, but also due to their other outstanding characteristics: chromatic variety, shock and vibration resistance, etc. Nevertheless, they need the development of new power supplies especially designed for boosting and taking advantage of their aforeme...

A Highly Efficient SEPIC-Flyback Integrated Converter as an LED Driver

Light-emitting diodes (LEDs) have been widely used for various lighting applications. A high power factor single-stage single-switch driver can be used to supply LEDs without using an electrolytic capacitor. By integrating the single-ended primary inductor converter (SEPIC) and flyback converter, LED driver could achieve nearly a unity power factor and low total harmonic distortion (THD). Since...