Off-line converter with digital control
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Abstract
A DC to DC converter comprising an energy storage element comprising an energy storage element input and an energy storage element output, the energy storage element input coupled to receive a first power level and the energy storage element output providing a second power level. The converter also comprises a feedback circuit comprising a feedback input and a feedback output, the feedback input coupled to the energy storage element output. The converter further comprises a regulator circuit comprising a regulator circuit feedback input and a regulator circuit output, the regulator circuit feedback input coupled to the feedback output and the regulator circuit output coupled to the energy storage element input, the regulator circuit regulating the input of the first power level to the energy storage element input. When a signal at the regulator circuit feedback input is above a threshold level the regulator circuit ceasing operation and when the signal at the regulator circuit feedback input is below the threshold level the regulator circuit is enabled.
296 Citations
45 Claims
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1-37. -37. (canceled)
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38. A circuit, comprising:
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switching means for coupling and decoupling first and second terminals of a power supply, one of the first and second terminals to be coupled to an input of the power supply, the other of the first and second terminals to be coupled to an energy transfer element of the power supply;
controlling means coupled to the switching means for controlling the switching means, the controlling means coupled to the switching means and to a third terminal of the power supply, the third terminal to receive a feedback signal representative of an output level of the power supply, the feedback signal having a first feedback state that represents an output level that is above a threshold level and a second feedback state that represents an output level that is below the threshold level; and
oscillating means for providing an oscillating signal, the oscillating signal to oscillate at a first frequency under a first set of conditions and at a second frequency under a second set of conditions, the controlling means for controlling the switching means in response to the feedback signal and the oscillating signal. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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Specification