A novel integrated buck-flyback non isolated power factor (PF) correction (PFC) converter is proposed in this paper. This new converter is an inherent integration of a buck converter and a flyback converter, which operates in either flyback mode or buck mode according to whether the input voltage is lower or higher than the output voltage. In this way, the dead zones of ac input current in trad...

Anaemia is a problem of global public health importance. This case control study investigated the prevalence and socio-economic factors associated with anaemia in UDUTH Sokoto, Nigeria. A total of 403 women attending ANC in in Sokoto, Nigeria constituted the subjects. Controls included 200 aged-matched and non-pregnant women. Haematocrit and the haemoglobin concentration was determined using th...

Controlling of DC-DC converter is vital task in power conversion. DC-DC converters are used in many applications like solar charger, computer power supplies, switching mode regulators, aircrafts etc. Focus of this paper is to model a controlling system for buck converter which controls output of buck converter constant instead of changing load and input supply to buck converter. Controlling met...

Cdv/dt induced turn-on of the synchronous MOSFET deteriorates performance in synchronous buck regulators. We will discuss this problem and provide several solutions that can reduce the effects. SYNCHRONOUS BUCK REGULATOR Synchronous buck topology is becoming popular in powering ultra-fast CPU cores. A standard buck circuit is shown in Figure 1(a) and a synchronous buck is shown in Figure 1(b). ...

AIM A cross-sectional study was conducted to determine the seroprevalence of bovine brucellosis among cattle slaughtered at three municipal abattoirs of Gombe State, Nigeria. MATERIALS AND METHODS A total of 200 blood samples collected from slaughtered cattle of different breeds (Sokoto Gudali - 50, White Fulani - 102, Red bororo - 34, and Crossbreeds - 14), sex (males - 19 and females - 181)...

This paper presents, linear peak current mode controller for the control of DC/DC buck converter is designed and analyzed. Dynamic equations describing the buck converter are derived and linear peak current mode controller is designed. The buck converter, the voltage mode and current mode controller are modeled and are evaluated by computer simulations. The proposed technique has the advantages...