本論文旨在研製一全橋變流器之控制晶片，以變頻調變之控制方式，使此全橋變流器可操作於柔性切換，藉此降低電路之切換損失。以本晶片之固定脈波調變訊號導通/截止時間的控制方式，搭配變流器串聯諧振的特性，此全橋變流器之四個功率開關可操作於零電流切換模式。此控制晶片最大特色為將控制電路積體化，以CMOS電路將原有之離散元件式控制電路取代，如此，原控制電路之面積可縮減至一顆IC之大小。
文中將闡述如何運用CMOS電路完成變流器之控制電路，配合一般全橋變流器之規格，本晶片可產生8k~200kHz之四組變頻控制訊號，且其責任週期可調整範圍為1μs~10μs。

The controller for Full-Bridge Series-Resonant Inverter (FB-SRI) is proposed. Using frequency modulation control method, the FB-SRI can operate at soft-switching mode, so the switching loss is reduced. The fixed on-time/off-time control signal combined with the characteristic of series-resonant circuits makes all the power switches of FB-SRI can operate at zero-current switching (ZCS) mode.
The most special feature of this chip is that it reduces the controller’s area by making all the control circuits on-chip. That is, the area of the controller can be narrow down to only one chip.
The realization of the controller will be discussed in detail. To fit for normal FB-SRI’s specification, the controller can produce four 8kHz ~ 200kHz frequency modulated signals, and the changeable range of their on-time/off-time is 1μs~ 10μs.

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