Buck converter having pulse skipping mode and related method of operation
AssigneeSamsung Electronics Co., Ltd.
InventorsJINHYUCK YU, MINKYU SONG
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Abstract
A buck converter comprises a switching unit configured to control a connection between a power terminal and a load terminal, a PWM controller configured to provide a PWM signal to the switching unit, and a control signal generator configured to generate a first control signal and a second control signal based on a current flowing to the load terminal, wherein the first control signal controls generation of the PWM signal and the second control signal controls a pulse width of the PWM signal.
Claims20
A buck converter having a pulse skipping mode, comprising:
- a switching unit configured to control a connection between a power terminal and a load terminal;
- a PWM controller configured to provide a PWM signal to the switching unit;
- and
- a control signal generator configured to generate a first control signal and a second control signal based on a current flowing to the load terminal, wherein the first control signal controls generation of the PWM signal and the second control signal controls a pulse width of the PWM signal.
A method of controlling a buck converter having a pulse skipping mode, comprising:
- controlling a PWM controller to provide a PWM signal based on a current flowing to a load terminal;
- expanding or narrowing a pulse width of the PWM signal;
- and
- selectively connecting a power terminal and the load terminal based on the PWM signal of which a pulse width is expanded or narrowed.
A buck converter, comprising:
- a switching unit configured to control a connection between a power terminal and a load terminal;
- a PWM controller configured to provide a PWM signal to the switching unit;
- and
- a control signal generator configured to generate a first control signal and a second control signal based on a current flowing to the load terminal, wherein the control signal generator generates the first control signal with a first value to cause the PWM controller to provide the PWM signal to the switching unit, and generates the first control signal with a second value to prevent the PWM controller from providing the PWM signal to the switching unit, and wherein the control signal generator generates the second control signal to control a duty cycle of the PWM signal.
Dependencies are inferred from the claim text.