Pulse width modulation controller of DC-DC converter
First Claim
Patent Images
1. A Pulse Width Modulation (PWM) controller of a DC-DC converter, comprising:
- a first comparator, receiving a compensated error signal and a ramp signal, wherein when the compensated error signal exceeds the ramp signal, the first comparator generates a trigger signal;
a PWM generator coupled to the first comparator, providing a timing signal according to the trigger signal to control the operation of the DC-DC converter; and
a compensation unit, compensating an error signal and causing an included angle between the compensated error signal and the ramp signal to increase.
0 Assignments
0 Petitions
Accused Products
Abstract
A DC-DC converter including a Pulse Width Modulation (PWM) controller for converting an input voltage into an output voltage is provided. The PWM controller includes a first comparator, receiving a compensated error signal and a ramp signal, wherein when the compensated error signal exceeds the ramp signal, the first comparator generates a trigger signal. The PWM controller further includes a PWM generator coupled to the first comparator, providing a timing signal according to the trigger signal to control the operation of the DC-DC converter.
-
Citations
14 Claims
-
1. A Pulse Width Modulation (PWM) controller of a DC-DC converter, comprising:
-
a first comparator, receiving a compensated error signal and a ramp signal, wherein when the compensated error signal exceeds the ramp signal, the first comparator generates a trigger signal; a PWM generator coupled to the first comparator, providing a timing signal according to the trigger signal to control the operation of the DC-DC converter; and a compensation unit, compensating an error signal and causing an included angle between the compensated error signal and the ramp signal to increase. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A Pulse Width Modulation (PWM) controller of a DC-DC converter, comprising:
-
a sense unit, generating a sensing signal corresponding to an output current of the DC-DC converter; a compensation unit coupled to the sense unit, generating a compensated signal according to the sensing signal and a ramp signal; a first comparator, receiving the compensated signal and an error signal, wherein when the error signal exceeds the compensated signal, the first comparator generates a trigger signal; a PWM generator coupled to the first comparator, providing a timing signal according to the trigger signal; and a ramp generator coupled to the PWM generator, generating the ramp signal according to the timing signal.
-
-
9. A Pulse Width Modulation (PWM) controller of a DC-DC converter, comprising:
-
a sense unit, generating a sensing signal corresponding to an output current of the DC-DC converter; a compensation unit coupled to the sense unit, compensating one of an error signal and a ramp signal to generate a compensated signal according to the sensing signal; a first comparator coupled to the compensation unit, generating a trigger signal according to the compensated signal and another of the error signal and the ramp signal; and a PWM generator coupled to the first comparator, providing a timing signal according to the trigger signal, wherein the compensation unit comprises; a resistor coupled between the sense unit and the first comparator; and a current source coupled between the resistor and a ground, sinking a current corresponding to the sensing signal from the resistor to the ground. - View Dependent Claims (10, 11, 12, 13, 14)
-
Specification