Self-excited push-pull converter
AssigneeMornsun Guangzhou Science & Technology Co., Ltd.
InventorBaojun Wang
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Abstract
A self-excited push-pull converter, where between the bases of the push-pull converter's transistors (TR1, TR2) and the effective power suppler there is provided a constant current source (II), which provides a constant current to the bases of the transistors. With the working voltage increases, the circuit enters into an operating mode not based on the core-saturation working mode, because the transistors' base current is limited by the constant current source and consequently the transistors' collector current cannot increase.
Claims18
A method of producing a self-excited push-pull oscillation in a converter comprising providing a constant current source between bases of push-pull transistors and an effective power supply end so that combined base current of said transistors is limited and remains constant in an event when operating voltage fluctuates.
A self-excited push-pull converter, comprising an input end, an output end, a transformer, a pair of push-pull switching transistors each of which has a base, and a constant current source located between said input end and said base of said transistors.
Dependencies are inferred from the claim text.