A Class-E/Fodd high power amplifier (PA) using the distributed active transformer (DAT) is demonstrated at 29MHz. The DAT combines the output power from four VDMOS push-pull pairs. The zero voltage switching (ZVS) condition is investigated and modified for the Class-E/Fodd amplifier with a non-ideal output transformer. All lumped elements including the DAT and the transistor package are modeled...

A single-stage LED driver based on interleaved buck-boost circuit and LLC resonant converter is proposed. The buck-boost circuit and LLC resonant converter are integrated by sharing switches, which can decrease the system cost and improve system efficiency. The input voltage of the buck-boost circuit is half of the rectified voltage, and two buckboost circuits are formed with the two half-bridg...

There has been an increasing interest in the soft-switching power conversion technologies in order to overcome the limitations of the hard-switching technologies [1]-[7]. Soft-switching (SS) converters had many advantages over hard-switching (HS) converters. For example, SS converters lower switching losses, reduce voltage/current stress, reduce EMI, and allow a greater high switching frequency...

This paper proposes a new converter topology that interfaces four ports: two sources, one bi-directional storage port and one isolated load port. In order to improve the efficiency of energy conversion, a sot switching boost converter using a simple auxiliary resonant circuit(SARC) which is composed of an auxiliary switch, a diode, a resonant inductor and a resonant capacitor is adopted. The co...

This paper proposes a novel auto-reset forward DC-DC converter with inductor-switching technique to obtain the high performance by means of zero voltage switching and the fast transient response at steep load variations. The performance of the forward converter is strongly depending on the transformer reset-method. The Auto-reset method is used to recover the energy stored in leakage inductance...

In this paper, class DE inverter with second order constant K band-pass filter is proposed. In the proposed inverter, the band-pass filter is used instead of the resonant filter in class DE inverter presented at the previous papers. By using band-pass filter, two important results can be gotten. One is the sensitivity of the output voltage to the operating frequency is suppressed by using band-...