Invention Grant
US5909108A Current-sharing circuit for parallel-coupled switches and switch-mode power converter employing the same 失效
并联开关的分流电路和采用该并联开关的开关式功率转换器

Current-sharing circuit for parallel-coupled switches and switch-mode
power converter employing the same
Abstract:
For use in a switch-mode power converter including parallel-coupled first and second switches, the first switch having a temperature-dependent resistance, a circuit for, and method of, distributing current between the first and second switches. In one embodiment, the circuit includes a device having a temperature-dependent characteristic, in thermal communication with the first switch and electrically coupled to a gate of the first switch, that senses a temperature of the first switch, modulates an amplitude of a drive waveform applied to the gate based on the temperature and thereby redistributes the current.
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