Buck converter and boost converter with dead time adjustment
AssigneeSamsung Electronics Co., Ltd.
InventorsGwang-Yol Noh, Yus Ko, Dongjin Keum, Hwayeal Yu
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Abstract
A voltage converter includes first and second charging elements, first and second switches, and first and second switch controllers. The first switch controller adjusts a first activation timing of a first control signal in response to a pulse width modulation signal, a switch signal, and a first control signal. The first control signal is a signal for controlling the first switch. The second switch controller adjusts a second activation timing of a second control signal in response to the pulse width modulation signal, the first control signal, and a second control signal. The second control signal is a signal for controlling the second switch.
Claims19
A voltage converter comprising:
- a first charging element connected between an output node and a switch node;
- a second charging element connected between the output node and a ground node;
- a first switch configured to control a connection between an input node supplied with an input voltage and the switch node in response to a first control signal;
- a second switch configured to control a connection between the switch node and the ground node in response to a second control signal;
- a first switch controller configured to adjust a first activation timing of the first control signal in response to a pulse width modulation signal, the first control signal, and the second control signal, and to activate the first control signal using the adjusted first activation timing, the first control signal and the second control signal being input to the first switch controller directly;
- and
- a second switch controller configured to adjust a second activation timing of the second control signal in response to the pulse width modulation signal, a switch signal of the switch node, and the second control signal, and to activate the second control signal using the adjusted second activation timing, the switch signal and the second control signal being input to the second switch controller directly.
A voltage converter comprising:
- a first charging element connected between an input node, supplied with an input voltage, and a switch node;
- a second charging element connected between an output node and a ground node;
- a first switch configured to control a connection between the output node and the switch node in response to a first control signal;
- a second switch configured to control a connection between the switch node and the ground node in response to a second control signal;
- a first switch controller configured to adjust a first activation timing of the first control signal in response to a pulse width modulation signal, a switch signal of the switch node, and the first control signal and to activate the first control signal using the adjusted first activation timing, the switch signal and the first control signal being input to the first switch controller directly;
- and
- a second switch controller configured to adjust a second activation timing of the second control signal in response to the pulse width modulation signal, the first control signal, and the second control signal and to activate the second control signal using the adjusted second activation timing, the first control signal and the second control signal being input to the second switch controller directly.
A method of operating a voltage converter including a first switch and a second switch serially connected to the first switch via a switch node, the method comprising:
- detecting, by a switch controller of the first and second switches, a first signal for controlling the first switch, a second signal for controlling the second switch, and a third signal at the switch node;
- controlling, by the switch controller, a turn-on timing of the first switch based on whether the first signal is delayed from the second signal;
- and
- controlling, by the switch controller, a turn-on timing of the second switch based on whether the third signal is lower than a ground voltage,
- wherein the switch controller receives the first and second signals directly to control the turn-on timing of the first switch, and receives and compares the second and third signals directly to control the turn-on timing of the second switch.
Dependencies are inferred from the claim text.