Controller for power converter
AssigneeRenesas Design (UK) Limited
InventorsJun MIN, Kai WAN, Keyue SHAN, Guang FENG, Yong LI
Life of this patent
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Abstract
A controller for a power converter for receiving an input voltage at a primary side and generating an output voltage at a secondary side, the power converter including a first primary side switch configured to be switchable between an on state and an off state, a second primary side switch configured to be switchable between the on state and the off state, and an energy transfer element configured to transfer energy from the input voltage to the secondary side. The controller is configured to operate in a first control state and a second control state.
Claims23
A controller for a power converter for receiving an input voltage at a primary side and generating an output voltage at a secondary side, the power converter comprising:
- a first primary side switch configured to be switchable between an on state and an off state;
- a second primary side switch configured to be switchable between the on state and the off state;
- and
- an energy transfer element configured to transfer energy from the input voltage to the secondary side;
- wherein:
- the controller is configured to:
- operate in a first control state, wherein the controller, whilst operating in the first control state, is configured to:
- i) switch the first primary side switch to the on state for a first on time duration;
- and
- ii) switch each of the first and second primary side switches to the off state for a first off time duration, after the first on time duration;
- and
- operate in a second control state, wherein the controller, whilst operating in the second control state, is configured to:
- i) switch the second primary side switch to the on state for a second on time duration;
- and
- ii) switch each of the first and second primary side switches to the off state for a second off time duration, after the second on time duration.
A power converter system comprising:
- a power converter for receiving an input voltage at a primary side and generating an output voltage at a secondary side, the power converter comprising:
- a first primary side switch configured to be switchable between an on state and an off state;
- a second primary side switch configured to be switchable between the on state and the off state;
- and
- an energy transfer element configured to transfer energy from the input voltage to the secondary side;
- and
- a controller is configured to:
- operate in a first control state, wherein the controller, whilst operating in the first control state, is configured to:
- i) switch the first primary side switch to the on state for a first on time duration;
- and
- ii) switch each of the first and second primary side switches to the off state for a first off time duration, after the first on time duration;
- and
- operate in a second control state, wherein the controller, whilst operating in the second control state, is configured to:
- i) switch the second primary side switch to the on state for a second on time duration;
- and
- ii) switch each of the first and second primary side switches to the off state for a second off time duration, after the second on time duration.
A method of controlling a power converter for receiving an input voltage at a primary side and generating an output voltage at a secondary side, the power converter comprising:
- a first primary side switch configured to be switchable between an on state and an off state;
- a second primary side switch configured to be switchable between the on state and the off state;
- and
- an energy transfer element configured to transfer energy from the input voltage to the secondary side;
- the method comprising:
- operating a controller in a first control state by:
- i) switching the first primary side switch to the on state for a first on time duration;
- and
- ii) switching each of the first and second primary side switches to the off state for a first off time duration, after the first on time duration;
- and
- operating the controller in a second control state by:
- i) switching the second primary side switch to the on state for a second on time duration;
- and
- ii) switching each of the first and second primary side switches to the off state for a second off time duration, after the second on time duration.
Dependencies are inferred from the claim text.