IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0021689
(2008-01-29)
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등록번호 |
US-8138733
(2012-03-20)
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우선권정보 |
EP-07300753 (2007-01-30) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Wolf, Greenfield & Sacks, P.C.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
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A method of controlling at least one transistor of a DC voltage converter to regulate an output voltage of the DC converter, the method including determining whether the output voltage of the DC converter is within a first or second voltage range, the second voltage range including a desired value o
A method of controlling at least one transistor of a DC voltage converter to regulate an output voltage of the DC converter, the method including determining whether the output voltage of the DC converter is within a first or second voltage range, the second voltage range including a desired value of the output voltage; if the output voltage is in the first voltage range, generating a control signal using a first control method performed by a first controller, the first controller receiving the output voltage and determining the control signal based on the value of the output voltage in the first voltage range; and if the output voltage is in the second range, generating a control signal using a second control method performed by a second controller, the second controller receiving the output voltage and determining the control signal based on the value of the output voltage in the second voltage range.
대표청구항
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1. A method of controlling at least one transistor of a DC voltage converter to regulate an output voltage of the DC converter, the method comprising: determining whether the output voltage of the DC converter is within a first or second voltage range;if said output voltage is within said first volt
1. A method of controlling at least one transistor of a DC voltage converter to regulate an output voltage of the DC converter, the method comprising: determining whether the output voltage of the DC converter is within a first or second voltage range;if said output voltage is within said first voltage range, generating a first control signal using a first control method performed by a first controller, said first controller receiving a first feedback signal indicative of the output voltage and determining the first control signal for restoring a desired output voltage value, the first control signal based on a value of the first feedback signal; andif said output voltage is within said second range, generating a second control signal using a second control method performed by a second controller, said second controller receiving the output voltage and determining the second control signal for restoring the desired output voltage value, the second control signal based on a value of the second feedback signal. 2. The method of claim 1, wherein the first control method comprises an element selected from the following group: a look-up table, fuzzy control, and a combination thereof. 3. The method of claim 1, wherein the first control method determines said control signal based on an error signal equal to a difference between said output voltage and a desired value of the output voltage. 4. The method of claim 1, wherein the second control method comprises the use of dither control. 5. The method of claim 1, further comprising providing a pulse width modulated control signal to said transistor, the pulse width modulated control signal determined by the first or second control signal. 6. Digital control circuitry adapted for controlling at least one transistor of a DC voltage converter and regulating the output voltage of the DC converter, the digital control circuitry comprising: a controller determination block configured to determine whether an output voltage of the DC converter is within a first or second voltage range;a first control block configured to receive a first feedback signal indicative of said output voltage, and to generate, when the output voltage is in said first voltage range, a first control signal for restoring a desired output voltage value, the first control signal based on a value of the first feedback signal; anda second control block configured to receive a second feedback signal indicative of said output voltage, and to generate a second control signal for restoring the desired output voltage value, the second control signal based on a value of the second feedback signal. 7. The digital control circuitry of claim 6, wherein the first control block comprises an element selected form the group consisting of: a look-up table, fuzzy logic, and a combination thereof. 8. The digital control circuitry of claim 7, wherein the second control signal comprises a dither control signal. 9. The digital control circuitry of claim 6, further comprising a pulse width modulator configured to provide a pulse width modulated signal to said transistor. 10. A DC voltage converter for boosting a voltage comprising the digital control circuitry of claim 6. 11. A DC voltage converter comprising: a controller determination block adapted to determine which voltage range of a plurality of voltage ranges an output voltage of the DC voltage converter falls within;a first feedback control circuit, configured to generate a first control signal for restoring a desired output voltage value of the converter, the first control signal based on a value of a first feedback signal; anda second feedback control circuit, configured to generate a second control signal for restoring the desired output voltage value of the converter, the second control signal based on a value of a second feedback signal;wherein the controller determination block is adapted to activate the first feedback control circuit or the second feedback control circuit depending on which voltage range the output voltage of the DC voltage converter falls within. 12. The DC voltage converter of claim 11, wherein the first and second feedback control circuits are configured to operate independently of each other. 13. The DC voltage converter of claim 11, wherein the controller determination block is adapted to receive a reference voltage value relating to the output voltage. 14. The DC voltage converter of claim 11, the first feedback control circuit comprising an element selected from the group consisting of: a look-up table, a fuzzy logic circuit, and a combination thereof. 15. The DC voltage converter of claim 11, the DC voltage converter comprising a converter selected from the group consisting of: buck converter, boost converter, and buck-boost converter. 16. The DC voltage converter of claim 11, wherein the DC voltage converter is incorporated in a device selected from the group consisting of: a computer, a mobile communication device, a media player, and a personal digital assistant. 17. The DC voltage converter of claim 11, wherein the controller determination block is adapted to provide a signal representative of the output voltage of the DC voltage converter to the activated first or second feedback control circuit. 18. The DC voltage converter of claim 17, wherein the first or second feedback control circuit is adapted to generate a control signal based on the value of the signal representative of the output voltage of the DC voltage converter. 19. The DC voltage converter of claim 18, wherein the control signal is provided to control a pulse width modulator for controlling at least one transistor of the DC voltage converter. 20. The DC voltage converter of claim 19, wherein the second feedback control circuit comprises a dither control circuit. 21. The DC voltage converter of claim 20, wherein the dither control circuit comprises: a dither logic block configured to provide one or plural duty cycle values in a group for the control signal; anda register configured to provide a previous group of duty cycle values to the dither logic block, whereinthe dither logic block determines the one or plural duty cycle values based upon the previous group of duty cycle values and the signal representative of the output voltage of the DC voltage converter. 22. The DC voltage converter of claim 20, wherein the dither control circuit is adapted to perform dithering at a speed determined by the value of the signal representative of the output voltage of the DC voltage converter. 23. The DC voltage converter of claim 20, wherein the dither control circuit is adapted to provide a continuous mode of operation, a slow dither mode of operation, and a fast dither mode of operation, each mode of operation selected based on the value of the signal representative of the output voltage of the DC voltage converter. 24. The DC voltage converter of claim 23 configured such that the continuous mode of operation is provided when the signal representative of the output voltage of the DC voltage converter corresponds to an output voltage of the DC voltage converter within a voltage range having a value between about ±0.1 percent and about ±5 percent of a reference voltage value and the signal for controlling a pulse width modulator does not change when the dither control circuit provides a continuous mode of operation. 25. The DC voltage converter of claim 11, the first feedback control circuit comprising: a plurality of look-up tables;a plurality of buffers; andan adder. 26. The DC voltage converter of claim 25, wherein the adder is configured to add at least a previous duty cycle value to one value obtained from the plurality of look-up tables, the one value obtained based on a current or previous error value, the error value representative of an error between the output voltage of the DC voltage converter and a selected reference voltage. 27. The DC voltage converter of claim 11, the first feedback control circuit comprising a fuzzy controller adapted to receive as input a signal representative of a current error value and a signal representative of a difference between the current error value and a previous error value, each error value representative of an error between the output voltage of the DC voltage converter and a selected reference voltage. 28. A method for controlling the output voltage of a DC voltage converter comprising: determining, by a controller determination block, which voltage range of a plurality of voltage ranges the output voltage of the DC voltage converter falls within; andactivating, responsive to determining that the output voltage falls within a first voltage range, a first feedback control circuit configured to restore an operating voltage according to a first method; andactivating, responsive to determining that the output voltage falls within a second voltage range, a second feedback control circuit configured to restore the operating voltage according to a second method. 29. The method of claim 28, wherein the first and second feedback control circuits are configured to operate independently of each other. 30. The method of claim 28 further comprising receiving, by the controller determination block or the first or second feedback control circuits, a reference voltage value relating to the output voltage. 31. The method of claim 28, the first feedback control circuit comprising an element selected from the group consisting of: a look-up table, a fuzzy logic circuit, and a combination thereof. 32. The method of claim 28, the DC voltage converter comprising a converter selected from the group consisting of: buck converter, boost converter, and buck-boost converter. 33. The method of claim 28 wherein the DC voltage converter is incorporated in a device selected from the group consisting of: a computer, a mobile communication device, a media player, and a personal digital assistant. 34. The method of claim 28 further comprising providing, by the controller determination block, a signal representative of the output voltage of the DC voltage converter to the activated first or second feedback control circuit. 35. The method of claim 34 further comprising generating, by the first or second feedback control circuit, a control signal based on the value of the signal representative of the output voltage of the DC voltage converter. 36. The method of claim 35, wherein the control signal is provided to control a pulse width modulator for controlling at least one transistor of the DC voltage converter. 37. The method of claim 34, wherein the second feedback control circuit comprises a dither control circuit. 38. The method of claim 37, wherein the dither control circuit comprises: a dither logic block configured to provide one or plural duty cycle values in a group for the control signal; anda register configured to provide a previous group of duty cycle values to the dither logic block, whereinthe dither logic block determines the one or plural duty cycle values based upon the previous group of duty cycle values and the signal representative of the output voltage of the DC voltage converter. 39. The method of claim 37, wherein the dither control circuit is further adapted to perform dithering at a speed determined by the value of the signal representative of the output voltage of the DC voltage converter. 40. The method of claim 37, wherein the dither control circuit is adapted to provide a continuous mode of operation, a slow dither mode of operation, and a fast dither mode of operation, each mode of operation selected based on the value of the signal representative of the output voltage of the DC voltage converter. 41. The method of claim 40, wherein the continuous mode of operation is provided when the signal representative of the output voltage of the DC voltage converter corresponds to an output voltage of the DC voltage converter within a voltage range having a value between about ±0.1 percent and about ±5 percent of a reference voltage value and the signal for controlling a pulse width modulator does not change when the dither control circuit provides a continuous mode of operation. 42. The method of claim 28, the first feedback control circuit comprising: a plurality of look-up tables;a plurality of buffers; andan adder. 43. The method of claim 42 further comprising adding, by the adder, at least a previous duty cycle value to one value obtained from the plurality of look-up tables, the one value obtained based on a current or previous error value, the error value representative of an error between the output voltage of the DC voltage converter and a selected reference voltage. 44. The method of claim 28, wherein the first feedback control circuit comprises a fuzzy controller, and further comprising: receiving, by the fuzzy controller, a signal representative of a current error value and a signal representative of a difference between the current error value and a previous error value, each error value representative of an error between the output voltage of the DC voltage converter and a selected reference voltage.
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