CONTROL CIRCUIT, SWITCHING POWER SUPPLY AND CONTROL METHOD
First Claim
1. A control circuit configured to control a switch-type converter, the control circuit comprising:
- a) a state detect circuit configured to generate an error amplifying signal according to a feedback voltage and a reference voltage, to compensate said error amplifying signal by a ramp compensation signal having a predetermined frequency, and to generate a state signal by comparing said compensated error amplifying signal against a voltage ripple signal, wherein said voltage ripple signal changes along with an inductor current of said switch-type converter; and
b) a control signal generator configured to generate control signals to control said switch-type converter according to said state signal.
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Accused Products
Abstract
A control circuit configured to control a switch-type converter, can include: (i) a state detect circuit configured to generate an error amplifying signal according to a feedback voltage and a reference voltage, to compensate the error amplifying signal by a ramp compensation signal having a predetermined frequency, and to generate a state signal by comparing the compensated error amplifying signal against a voltage ripple signal, where the voltage ripple signal changes along with an inductor current of the switch-type converter; and (ii) a control signal generator configured to generate control signals to control the switch-type converter according to the state signal.
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Citations
15 Claims
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1. A control circuit configured to control a switch-type converter, the control circuit comprising:
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a) a state detect circuit configured to generate an error amplifying signal according to a feedback voltage and a reference voltage, to compensate said error amplifying signal by a ramp compensation signal having a predetermined frequency, and to generate a state signal by comparing said compensated error amplifying signal against a voltage ripple signal, wherein said voltage ripple signal changes along with an inductor current of said switch-type converter; and b) a control signal generator configured to generate control signals to control said switch-type converter according to said state signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling a switch-type converter, the method comprising:
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a) generating an error amplifying signal according to a feedback voltage and a reference voltage; b) compensating said error amplifying signal by a ramp compensation signal having a predetermined frequency; c) generating a state signal by comparing said compensated error amplifying signal against a voltage ripple signal, wherein said voltage ripple signal changes along with an inductor current of said switch-type converter; and d) generating control signals for controlling said switch-type converter according to said state signal. - View Dependent Claims (14, 15)
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Specification