An AC–DC PFC Single-Stage Dual Inductor Current-Fed Push–Pull for HB-LED Lighting Applications

Abstract

An ac-dc single-stage driver for High Brightness Light-Emitting Diodes with galvanic isolation is presented in this paper. The driver is based on a Dual Inductor Current-Fed Push-Pull converter with each inductor operating in Boundary Conduction Mode. The interleaving between the two inductors enables the converter to reduce the high input current ripple inherent to a BCM. Moreover, it is fully compliant with IEC 1000-3-2 Class C and it is able to achieve a high Power Factor. Its low component count, simplicity and overall outstanding characteristics make this current-fed topology suitable for medium power range HB-LED drivers in low cost applications. The proposed topology has been tested on a 100W prototype for the full range of the US single-phase line voltage, feeding several HB-LED strings, with an output voltage equivalent to 48V at full load. The prototype achieves a maximum efficiency of 92% with a 0.99 power factor, 8% THD at full load while guaranteeing good quality light.

A Review on Flicker-Free AC–DC LED Drivers for Single-Phase and Three-Phase AC Power Grids

“…Nonetheless, some works of single-stage ac-dc currentfed isolated converters have been proposed in literature, such as, a current-fed push-pull [135], see Fig. 11, a dual inductor current-fed push-pull [136], or a current-fed full-bridge [137]. In the previous literature, the use of these topologies to implement ac-dc LED drivers can be found, particularly a push-pull converter in [138] and a dual inductor current-fed push-pull in [136].…”

“…11, a dual inductor current-fed push-pull [136], or a current-fed full-bridge [137]. In the previous literature, the use of these topologies to implement ac-dc LED drivers can be found, particularly a push-pull converter in [138] and a dual inductor current-fed push-pull in [136]. The first proposal does not address any of the aforementioned issues, achieving a very low efficiency while suffering at the same time from high voltage stress on the main switches.…”

“…Active: single-stage -> 25 W [47]- [50], [53], [60], [73]- [75], [77], [108], [110]- [114], [136], [138], [196]…”

Pulse width modulation converter for light‐emitting diode tube light applications

“…Such ripple minimization methods were discussed in recent research articles The single‐stage LED driver has been examined for a long time, which comprises of a PFC stage and a dc‐dc converter by sharing dynamic control switches and control circuits . Among these single‐stage converters, series‐parallel resonant circuit (also known as LLC) is a broadly utilized topology for its delicate exchanging qualities.…”

“…7,8 The single-stage LED driver has been examined for a long time, which comprises of a PFC stage and a dc-dc converter by sharing dynamic control switches and control circuits. [9][10][11][12][13][14][15] Among these single-stage converters, seriesparallel resonant circuit (also known as LLC) is a broadly utilized topology for its delicate exchanging qualities. In those places where the line voltage is 220-230 V ac, it is important to reduce the amplitude of the dc transport voltage.…”