Driver circuit for controlling a resonant converter
First Claim
1. A driver circuit for controlling upper and lower switching means for converting a direct voltage into a clocked output voltage for a resonant converter with a high-voltage section for controlling the upper switching means and a low-voltage section for controlling the lower switching means which switch the switching means on alternately, the switch-on phases of the switching means being separated from one another by dead-time phases, characterized in that there is provided a first circuit section which controls the duty cycle of the upper switching means as a function of the duty cycle a-of the lower switching means and receives control signals from the low-voltage section exclusively during the duty cycle of the lower switching means.
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Accused Products
Abstract
In order to improve the efficiency of a driver circuit for controlling upper and lower switching means (T3, T4) for converting a direct voltage Ud into a clocked output voltage Ua for a resonant converter with a high-voltage section (HT) for controlling the upper switching means (T3) and a low-voltage section (NT) for controlling the lower switching means (T4), which switch the switching means (T3, T4) on alternately to one another, the switch-on phases of the switching means (T3, T4) being separated from one another by dead-time phases, there is provided a first circuit section which controls the duty cycle Δtein3 of the upper switching means (T3) as a function of the duty cycle Δtein4 of the lower switching means (T4), and receives control signals from the low-voltage section (NT) exclusively during the duty cycle Δtein4 of the lower switching means (T4).
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Citations
12 Claims
- 1. A driver circuit for controlling upper and lower switching means for converting a direct voltage into a clocked output voltage for a resonant converter with a high-voltage section for controlling the upper switching means and a low-voltage section for controlling the lower switching means which switch the switching means on alternately, the switch-on phases of the switching means being separated from one another by dead-time phases, characterized in that there is provided a first circuit section which controls the duty cycle of the upper switching means as a function of the duty cycle a-of the lower switching means and receives control signals from the low-voltage section exclusively during the duty cycle of the lower switching means.
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12. A resonant converter with a driver circuit for controlling upper and lower switching means for converting a direct voltage into a clocked output voltage for the resonant converter with a high-voltage section for controlling the upper switching means and a low-voltage section for controlling the lower switching means which switch the switching means on alternately, the switch-on phases of the switching means being separated from one another by dead-time phases, characterized by a first circuit section, which controls the duty cycle of the upper switching means as a function of the duty cycle of the lower switching means and receives control signals from the low-voltage section exclusively during the duty cycle of the lower switching means.
Specification