Alcoa Fujikura Gesellschaft MIT Beschraenkter Haftung

Flextronics International Kft.

Ignaz Fortmeier

Horst Flock

A control circuit is provided for the power-controlled operation of a load in a portion of a load range. A semiconductor switch is provided which is effective in a load circuit. A drive circuit for the switch generates a control signal. The control signal comprises drive pulses following one another and separated by interpulse periods, for controlling the load in a portion of the load range. In an upper portion of the portion of the load range, the control signal comprises a first pulse signal, with first individual pulses following one another with a first pulse frequency, and a second pulse signal, with second individual pulses following one another with a second pulse frequency in the interpulse periods of the first pulse signal. The second pulse frequency may be greater than the first pulse frequency by at least a factor of 10.

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Ludwigshafen, Germany

Ignaz Fortmeier