DC/DC converter, method for providing an output voltage on the basis of an input voltage and computer program
First Claim
Patent Images
1. A DC/DC converter, comprising:
- a switch mode converter configured to provide an output voltage based on an input voltage; and
a drive signal generator configured to provide a drive signal for the switch mode converter,wherein the drive signal generator is configured to switch between a non-pulse-skipping mode and a pulse-skipping mode,wherein the drive signal generator is configured to adapt a setting of a pulse generation such that a length of a first pulse following a pulse skipping in the pulse-skipping mode is larger than a minimum length of a pulse in the non-pulse-skipping mode,wherein upon occurrence of an immediately subsequent pulse in the next switching cycle after the first pulse, a length of the immediately subsequent pulse is less than the length of the first pulse, andwherein the drive signal generator is configured to selectively omit provision of a pulse of the drive signal if a desired duty cycle information is smaller than or equal to a first threshold duty cycle value represented by a first threshold duty cycle information, and increase in a step-wise fashion the desired duty cycle information from a value below the first threshold duty cycle value to a value above a second threshold duty cycle value in response to an omission of provision of a pulse of the drive signal, such that a length of the first pulse following the pulse skipping is larger than the minimum length of the pulse in the non-pulse-skipping mode.
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Abstract
A DC/DC converter includes a switch mode converter for providing an output voltage based on an input voltage and a drive signal generator configured to provide a drive signal for the switch mode converter. The drive signal generator is configured to switch between a non-pulse-skipping mode and a pulse-skipping mode. Moreover, the drive signal generator is configured to adapt a setting of a pulse generation such that a length of a first pulse following a pulse skipping is larger than a minimum length of a pulse in the non-pulse-skipping mode.
12 Citations
22 Claims
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1. A DC/DC converter, comprising:
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a switch mode converter configured to provide an output voltage based on an input voltage; and a drive signal generator configured to provide a drive signal for the switch mode converter, wherein the drive signal generator is configured to switch between a non-pulse-skipping mode and a pulse-skipping mode, wherein the drive signal generator is configured to adapt a setting of a pulse generation such that a length of a first pulse following a pulse skipping in the pulse-skipping mode is larger than a minimum length of a pulse in the non-pulse-skipping mode, wherein upon occurrence of an immediately subsequent pulse in the next switching cycle after the first pulse, a length of the immediately subsequent pulse is less than the length of the first pulse, and wherein the drive signal generator is configured to selectively omit provision of a pulse of the drive signal if a desired duty cycle information is smaller than or equal to a first threshold duty cycle value represented by a first threshold duty cycle information, and increase in a step-wise fashion the desired duty cycle information from a value below the first threshold duty cycle value to a value above a second threshold duty cycle value in response to an omission of provision of a pulse of the drive signal, such that a length of the first pulse following the pulse skipping is larger than the minimum length of the pulse in the non-pulse-skipping mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A DC/DC converter, comprising:
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means for providing an output voltage based on an input voltage; and means for providing a drive signal for the means for providing the output voltage, wherein the means for providing the drive signal is configured to switch between a non-pulse-skipping mode and a pulse-skipping mode, wherein the means for providing the drive signal is configured to adapt a setting of a pulse generation such that a length of a first pulse following a pulse skipping in the pulse-skipping mode is larger than a minimum length of a pulse in the non-pulse-skipping mode, wherein the means for providing the drive signal is further configured to adapt a setting of the pulse generation such that upon occurrence of an immediately subsequent pulse in the next switching cycle after the first pulse, a length of the immediately subsequent pulse is less than the length of the first pulse, and wherein the means for providing the drive signal is further configured to selectively omit provision of a pulse of the drive signal if a desired duty cycle information is smaller than or equal to a first threshold duty cycle value represented by a first threshold duty cycle information, and increase in a step-wise fashion the desired duty cycle information from a value below the first threshold duty cycle value to a value above a second threshold duty cycle value in response to the omission of provision of a pulse of the drive signal, such that a length of the first pulse following the pulse skipping is larger than the minimum length of the pulse in the non-pulse-skipping mode. - View Dependent Claims (16)
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17. A DC/DC converter, comprising:
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a switch mode converter configured to provide an output voltage based on an input voltage; and a drive signal generator configured to provide a drive signal for the switch mode converter, wherein the drive signal generator is configured to switch between a non-pulse-skipping mode and a pulse-skipping mode, wherein the drive signal generator is configured to adapt a setting of a pulse generation such that a length of a first pulse following a pulse skipping mode is larger than a minimum length of a pulse in the non-pulse-skipping mode; wherein the DC/DC converter is a synchronous DC/DC converter, wherein the DC/DC converter comprises a timing generator configured to define a sequence of switching cycles, wherein the drive signal generator is configured to provide a pulse of the drive signal for each switching cycle in the non-pulse-skipping mode, and wherein the drive signal generator is configured to omit provision of a pulse of the drive signal in one or more switching cycles in the pulse-skipping mode, to thereby perform a pulse skipping; wherein the drive signal generator is configured to adjust a duty cycle of the pulses of the drive signal in the non-pulse-skipping mode based on a comparison or difference formation between the output voltage and a reference voltage, such that the minimum length of a pulse is obeyed; wherein the drive signal generator is configured to obtain a desired duty cycle information based on the comparison or difference formation between the output voltage and the reference voltage both in the pulse-skipping mode and in the non-pulse-skipping mode; wherein the drive signal generator is configured to compare the desired duty cycle information with a first fixed threshold duty cycle value, and to switch from the non-pulse-skipping mode to the pulse-skipping mode if the desired duty cycle information is smaller than or equal to the first fixed threshold duty cycle value; wherein the drive signal generator is configured to selectively omit provision of a pulse of the drive signal if the desired duty cycle information is smaller than or equal to the first fixed threshold duty cycle value, and increase in a step-wise fashion the desired duty cycle information from a value below the first fixed threshold duty cycle value to a value above a second fixed threshold duty cycle value in response to the omission of provision of a pulse of the drive signal, such that a length of a first pulse following the pulse skipping in the pulse-skipping mode is larger than the minimum length of a pulse in the non-pulse-skipping mode, and wherein upon occurrence of an immediately subsequent pulse in the next switching cycle after the first pulse, a length of the immediately subsequent pulse is less than the length of the first pulse. - View Dependent Claims (18)
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19. A method for providing an output voltage based on an input voltage using a switch mode converter, the method comprising:
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providing a drive signal for a switch mode converter; and switching a switch of the switch mode converter based on the drive signal to provide the output voltage based on the input voltage, wherein providing the drive signal comprises providing the drive signal in a non-pulse-skipping mode and providing the drive signal in a pulse-skipping mode; wherein a switching is performed between the non-pulse-skipping mode and the pulse-skipping mode; wherein a setting of a pulse generation of the drive signal is adapted such that a length of a first pulse following a pulse skipping in the pulse-skipping mode is larger than a minimum length of a pulse in the non-pulse-skipping mode, wherein the setting of the pulse generation of the drive signal is further adapted such that upon occurrence of an immediately subsequent pulse in the next switching cycle after the first pulse, a length of the immediately subsequent pulse is less than the length of the first pulse, and wherein a desired duty cycle information is increased in a step-wise fashion from a value below a first fixed threshold duty cycle value to a value above a second fixed threshold duty cycle value in response to the omission of the provision of the pulse of the drive signal, such that a provision of one or more pulses of the drive signal is only resumed after the omission of the provision of one or more pulses of the drive signal when the desired duty cycle information reaches or exceeds the second fixed threshold duty cycle value. - View Dependent Claims (20, 21, 22)
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Specification