Parameter identification circuit, method and power supply system applying the same
First Claim
1. A parameter identification circuit for a digital power converter having an inductor and a capacitor, the parameter identification circuit comprising:
- a) an inductor parameter circuit configured to receive an inductor current of said inductor, a capacitor voltage of said capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, wherein said inductor parameter circuit is configured to obtain an inductor parameter according to an integrated value of said capacitor voltage, an integrated value of said duty cycle in said start-up stage, and said predetermined inductor current, when said inductor current rises to a level of said predetermined inductor current;
b) a capacitor parameter circuit configured to receive said inductor current, said capacitor voltage, and a predetermined capacitor voltage, wherein said capacitor parameter circuit is configured to obtain a capacitor parameter according to an integrated value of said inductor current and said predetermined capacitor voltage when said capacitor voltage rises to a level of said predetermined capacitor voltage; and
c) wherein said inductor parameter circuit is configured to obtain a product value by multiplying said integrated value of said duty cycle in said start-up stage by an input voltage, and to obtain a difference value by subtracting said integrated value of said capacitor voltage from said product value, wherein said inductor parameter is obtained by dividing said difference value by said predetermined inductor current.
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Accused Products
Abstract
A parameter identification circuit for a digital power converter having an inductor and a capacitor, can include: an inductor parameter circuit that receives an inductor current of the inductor, a capacitor voltage of the capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, where the inductor parameter circuit obtains an inductor parameter according to an integrated value of the capacitor voltage, an integrated value of the duty cycle in the start-up stage, and the predetermined inductor current, when the inductor current rises to a level of the predetermined inductor current; and a capacitor parameter circuit that receives the inductor current, the capacitor voltage, and a predetermined capacitor voltage, where the capacitor parameter circuit obtains a capacitor parameter according to an integrated value of the inductor current and the predetermined capacitor voltage when the capacitor voltage rises to a level of the predetermined capacitor voltage.
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Citations
12 Claims
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1. A parameter identification circuit for a digital power converter having an inductor and a capacitor, the parameter identification circuit comprising:
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a) an inductor parameter circuit configured to receive an inductor current of said inductor, a capacitor voltage of said capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, wherein said inductor parameter circuit is configured to obtain an inductor parameter according to an integrated value of said capacitor voltage, an integrated value of said duty cycle in said start-up stage, and said predetermined inductor current, when said inductor current rises to a level of said predetermined inductor current; b) a capacitor parameter circuit configured to receive said inductor current, said capacitor voltage, and a predetermined capacitor voltage, wherein said capacitor parameter circuit is configured to obtain a capacitor parameter according to an integrated value of said inductor current and said predetermined capacitor voltage when said capacitor voltage rises to a level of said predetermined capacitor voltage; and c) wherein said inductor parameter circuit is configured to obtain a product value by multiplying said integrated value of said duty cycle in said start-up stage by an input voltage, and to obtain a difference value by subtracting said integrated value of said capacitor voltage from said product value, wherein said inductor parameter is obtained by dividing said difference value by said predetermined inductor current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of identifying parameters of a digital power converter having an inductor and a capacitor, the method comprising:
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a) setting a predetermined inductor current and a predetermined capacitor voltage; b) obtaining an inductor current of said inductor, a capacitor voltage of said capacitor, and a duty cycle in a start-up stage of said digital power converter; c) obtaining an inductor parameter according to an integrated value of said capacitor voltage, an integrated value of said duty cycle in said start-up stage, and said predetermined inductor current, when said inductor current rises to a level of said predetermined inductor current; d) obtaining a capacitor parameter according to an integrated value of said inductor current and said predetermined capacitor voltage when said capacitor voltage rises to a level of said predetermined capacitor voltage; e) obtaining a product value by multiplying said integrated value of said duty cycle in said start-up stage by an input voltage; f) obtaining a difference value by subtracting said integrated value of said capacitor voltage from said product value; and g) generating said inductor parameter by dividing said difference value by said predetermined inductor current. - View Dependent Claims (8)
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9. A parameter identification circuit for a digital power converter having an inductor and a capacitor, the parameter identification circuit comprising:
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a) an inductor parameter circuit configured to receive an inductor current of said inductor, a capacitor voltage of said capacitor, a duty cycle in a start-up stage, and a predetermined inductor current, wherein said inductor parameter circuit is configured to obtain an inductor parameter according to an integrated value of said capacitor voltage, an integrated value of said duty cycle in said start-up stage, and said predetermined inductor current, when said inductor current rises to a level of said predetermined inductor current; b) a capacitor parameter circuit configured to receive said inductor current, said capacitor voltage, and a predetermined capacitor voltage, wherein said capacitor parameter circuit is configured to obtain a capacitor parameter according to an integrated value of said inductor current and said predetermined capacitor voltage when said capacitor voltage rises to a level of said predetermined capacitor voltage, wherein said capacitor parameter comprises a quotient of said integrated value of said inductor current and said predetermined capacitor voltage; and c) wherein said capacitor parameter circuit comprises a second comparator configured to receive said capacitor voltage and said predetermined capacitor voltage, and to generate a second comparison signal, a third integrator configured to receive said second comparison signal and said inductor current, and to perform an integrating operation on said inductor current according to a level of said second comparison signal, and a divider configured to receive said integrated value of said inductor current and said predetermined capacitor voltage, and to generate said capacitor parameter by performing a division operation. - View Dependent Claims (10, 11, 12)
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Specification