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A new high-voltage integrated circuit (HVIC) is described which controls either PWM or Resonant half-bridge circuit topologies for power supply applications at frequencies up to 1 MHz. The HVIC technology allows the two power FETs in half-bridge circuit arrangements to be driven from a single silicon chip thus eliminating external, isolated gate drivers. Isolation for the "upper" FET gate...
This paper describes the development of a 1.4 M H z secondary-side quasi-resonant off-line dc-to-dc converter. The material presented covers operation of the half-bridge circuit, derivation of the circuit equations, a design example, prototype description and comparisons between simulations and actual circuit performance.
In the past few years there has been a need to improve the density of power conversion systems. This need is met by increasing the operating frequency of power converters from hundreds of kilohertz to tens of megahertz. The development of higher frequency power converters has been limited by the control integrated circuits, magnetics, capacitors , and an anticipated lower conversion efficiency.
The half-bridge series resonant, parallel resonant and combination series-parallel resonant converters are compared for use in low output voltage power supply applications. It is shown that the combination series-parallel converter, which takes on the desirable characteristics of the pure series and the pure parallel converter, removes the main disadvantages of those two converters. Analyses and breadboard...
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