Power converter with dynamic preload
AssigneeDialog Semiconductor GmbH
InventorsJianming Yao, Yimin Chen, Dickson T. Wong, Yong Li
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Abstract
A power converter with a dynamic preload. The power converter includes a magnetic component coupled between an input and an output of the power converter. The output of the power converter has an output voltage for providing power to a load. A switch is adapted to control current through the magnetic component according to on and off times of the switch. A dynamic preload circuit is coupled to the output of the power converter. The dynamic preload has loading characteristics that are adjusted responsive to a signal indicative of an output voltage at the output of the power converter.
Claims20
A power converter comprising:
- a magnetic component coupled between an input and an output of the power converter, the output of the power converter having an output voltage for providing power to a load;
- a switch to control current through the magnetic component according to on and off times of the switch;
- and
- a dynamic preload circuit coupled to the output of the power converter, the dynamic preload circuit dissipating power from the output of the power converter and presenting a resistance to the output of the power converter that is adjusted responsive to a signal indicative of the output voltage at the output of the power converter.
A power converter comprising:
- a magnetic component coupled between an input and an output of the power converter, the output of the power converter having an output voltage for providing power to a load;
- a switch to control current through the magnetic component according to on and off times of the switch;
- and
- a dynamic preload circuit coupled to the output of the power converter, the dynamic preload circuit adapted to draw current from the output of the power converter and adapted to adjust the current drawn from the output of the power converter based on a signal indicative of the output voltage at the output of the power converter.
A method of operation in a power converter having a magnetic component coupled between an input and an output of the power converter, the method comprising:
- regulating an output voltage at the output of the power converter for providing power to a load by switching current through the magnetic component, the output of the power converter coupled to a dynamic preload circuit that dissipates power from the output of the power converter;
- and
- adjusting one of:
- a resistance presented by the dynamic preload circuit to the output of the power converter based on a signal indicative of the output voltage at the output of the power converter, or
- a current drawn from the output of the power converter by the dynamic preload circuit based on a signal indicative of the output voltage at the output of the power converter.
Dependencies are inferred from the claim text.