ADAPTIVE DEAD TIME CONTROL
First Claim
1. A system comprising:
- a dead time detector that detects when a dead time occurs and that generates an output signal based on a duration of the dead time, wherein the dead time is a period of time during which a high-side switch and a low-side switch of a switching regulator are turned off;
a first circuit that generates a first turn-on signal to turn on the high-side switch and a first turn-off signal to turn off the low-side switch based on the output signal in response to a first edge of a pulse width modulated pulse;
a second circuit that generates a second turn-on signal to turn on the low-side switch and a second turn-off signal to turn off the high-side switch based on the output signal in response to a second edge of the pulse width modulated pulse; and
a controller that generates a first gate drive signal to drive the high-side switch and a second gate drive signal to drive the low-side switch based on the first and second turn-on and turn-off signals.
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Accused Products
Abstract
A dead time detector detects when a dead time occurs in a switching regulator comprising a high-side switch and a low-side switch and generates an output signal based on a duration of the dead time. A first circuit generates a first turn-on signal to turn on the high-side switch and a first turn-off signal to turn off the low-side switch based on the output signal in response to a first edge of a pulse width modulated pulse. A second circuit generates a second turn-on signal to turn on the low-side switch and a second turn-off signal to turn off the high-side switch based on the output signal in response to a second edge of the pulse width modulated pulse. A controller generates drive signals to drive the high-side and low-side switches based on the first and second turn-on and turn-off signals.
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Citations
22 Claims
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1. A system comprising:
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a dead time detector that detects when a dead time occurs and that generates an output signal based on a duration of the dead time, wherein the dead time is a period of time during which a high-side switch and a low-side switch of a switching regulator are turned off; a first circuit that generates a first turn-on signal to turn on the high-side switch and a first turn-off signal to turn off the low-side switch based on the output signal in response to a first edge of a pulse width modulated pulse; a second circuit that generates a second turn-on signal to turn on the low-side switch and a second turn-off signal to turn off the high-side switch based on the output signal in response to a second edge of the pulse width modulated pulse; and a controller that generates a first gate drive signal to drive the high-side switch and a second gate drive signal to drive the low-side switch based on the first and second turn-on and turn-off signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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detecting when a dead time occurs, wherein the dead time is a period of time during which a high-side switch and a low-side switch of a switching regulator are turned off; generating an output signal based on a duration of the dead time; generating a first turn-on signal to turn on the high-side switch and a first turn-off signal to turn off the low-side switch based on the output signal in response to a first edge of a pulse width modulated pulse; generating a second turn-on signal to turn on the low-side switch and a second turn-off signal to turn off the high-side switch based on the output signal in response to a second edge of the pulse width modulated pulse; and generating a first gate drive signal to drive the high-side switch and a second gate drive signal to drive the low-side switch based on the first and second turn-on and turn-off signals. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification