DC-to-DC converter with adaptive dead-time control
First Claim
1. A DC-to-DC converter comprising:
- first and second switches that are connected to each other at a node, that are connected in series across first and second potentials, and that are biased by pulse-width modulated (PWM) pulses;
an inductance connected between the node and a load;
a timing module that determines a first time difference between a first edge of a first signal at the node and a first edge of a second signal at a control terminal of the first switch and that determines a second time difference between a second edge of the first signal at the node and a second edge of the second signal at the control terminal of the first switch, wherein the first and second edges of the second signal correspond to first and second edges of one of the PWM pulses, respectively;
a delay module that delays the first and second edges of the second signal at the control terminal of the first switch based on the first and second time differences, respectively; and
a charge pump that outputs a voltage,wherein the delay module delays an edge of one of the PWM pulses based on an amount of change in the voltage output by the charge pump.
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Accused Products
Abstract
A DC-to-DC converter includes first and second switches connected to each other at a node and biased by PWM pulses. A timing module determines a first time difference between a first edge of a first signal at the node and a first edge of a second signal at a control terminal of the first switch, and a second time difference between a second edge of the first signal and a second edge of the second signal. The first and second edges of the second signal correspond to first and second edges of one of the PWM pulses, respectively. A delay module delays the first and second edges of the second signal based on the first and second time differences, respectively. The delay module delays an edge of one of the PWM pulses based on an amount of change in a voltage output by a charge pump.
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Citations
16 Claims
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1. A DC-to-DC converter comprising:
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first and second switches that are connected to each other at a node, that are connected in series across first and second potentials, and that are biased by pulse-width modulated (PWM) pulses; an inductance connected between the node and a load; a timing module that determines a first time difference between a first edge of a first signal at the node and a first edge of a second signal at a control terminal of the first switch and that determines a second time difference between a second edge of the first signal at the node and a second edge of the second signal at the control terminal of the first switch, wherein the first and second edges of the second signal correspond to first and second edges of one of the PWM pulses, respectively; a delay module that delays the first and second edges of the second signal at the control terminal of the first switch based on the first and second time differences, respectively; and a charge pump that outputs a voltage, wherein the delay module delays an edge of one of the PWM pulses based on an amount of change in the voltage output by the charge pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A DC-to-DC converter comprising:
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first and second switches that are connected to each other at a node, that are connected in series across a supply voltage and a reference potential, and that are biased by pulse-width modulated (PWM) pulses; an inductance connected between the node and a load; a timing module that determines a first time difference between a first edge of a first signal at the node and a first edge of a second signal at a control terminal of the first switch, a second time difference between a second edge of the first signal at the node and a second edge of the second signal at the control terminal of the first switch, a third time difference between the second edge of the first signal at the node and a first edge of a third signal at the control terminal of the second switch, and a fourth time difference between the first edge of the first signal at the node and a second edge of the third signal at the control terminal of the second switch, wherein the first and second edges of the second signal and the second and first edges of the third signal respectively correspond to first and second edges of one of the PWM pulses; a plurality of charge pumps that output respective voltages based on the first, second, third, and fourth time differences; and a delay module that delays the first and second edges of the second signal at the control terminal of the first switch based on the first and second time differences, respectively, that delays the first and second edges of the third signal at the control terminal of the second switch based on the third and fourth time differences, respectively. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification