Patent
Circuit arrangement for controlling power transistors of a power converter
Mario Mauerer,Johann W. Kolar +1 more
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TLDR
In this article, a first and a second isolator are configured to galvanically isolate transmission of the PWM signal and the clock signal into a high-voltage portion of the power converter so as to produce a galvanically isolated PWM and an isolated clock signal.Abstract:
A circuit arrangement for controlling power transistors of a power converter includes a logic circuit configured to generate a pulse-width modulation (PWM) signal and a clock generator configured to generate a clock signal. A first and a second isolator are configured to galvanically isolate transmission of the PWM signal and the clock signal into a high-voltage portion of the power converter so as to produce a galvanically isolated PWM signal and a galvanically isolated clock signal. The first isolator for the PWM signal is configured transmit both DC voltage signals and AC voltage signals. A correction circuit is configured to correct jitter of the galvanically isolated PWM signal based on the galvanically isolated clock signal. The second isolator for the clock signal exhibits a jitter lower than that of the first isolator by a factor of at least two.read more
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