Method and apparatus for intelligently setting dead time
First Claim
1. Apparatus for setting dead time between ON times of two series connected switches of a power converter circuit connected across a supply potential, the apparatus comprising:
- a circuit for monitoring a power converter circuit parameter and providing an output corresponding to the circuit parameter;
a memory addressed by a signal related to the output of the monitoring circuit, the memory having values stored therein related to the dead times and associated with values of the circuit parameter;
a processor providing an output of the memory associated with the value of the circuit parameter to set the dead time corresponding to the stored value in the memory, and a dead time implementing stage for implementing the dead time in accordance with the output of the memory.
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Accused Products
Abstract
Apparatus for setting dead time between ON times of two series connected switches of a power converter circuit connected across a supply potential, the apparatus comprising a circuit for monitoring a power converter circuit parameter and providing an output corresponding to the circuit parameter; a memory addressed by a signal related to the output of the monitoring circuit, the memory having values stored therein related to the dead times and associated with values of the circuit parameter; a processor providing an output of the memory associated with the value of the circuit parameter to set the dead time corresponding to the stored value in the memory, and a dead time implementing stage for implementing the dead time in accordance with the output of the memory.
45 Citations
53 Claims
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1. Apparatus for setting dead time between ON times of two series connected switches of a power converter circuit connected across a supply potential, the apparatus comprising:
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a circuit for monitoring a power converter circuit parameter and providing an output corresponding to the circuit parameter;
a memory addressed by a signal related to the output of the monitoring circuit, the memory having values stored therein related to the dead times and associated with values of the circuit parameter;
a processor providing an output of the memory associated with the value of the circuit parameter to set the dead time corresponding to the stored value in the memory, and a dead time implementing stage for implementing the dead time in accordance with the output of the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for setting dead time between ON times of two series connected switches of a power converter circuit connected across a supply potential, the method comprising:
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monitoring a power converter circuit parameter and providing an output corresponding to the circuit parameter;
addressing a memory with a signal related to the output and having values stored therein related to the dead times and associated with values of the circuit parameter;
providing an output of the memory associated with the value of the circuit parameter to set the dead time corresponding to the stored value in the memory, and implementing the dead time in accordance with the output of the memory. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. Apparatus for minimizing power losses associated with dead time between ON times of two series connected switches of a power converter connected across a supply potential, the apparatus comprising:
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a control arrangement for monitoring a selected parameter associated with power loss during the dead time of the converter;
the control arrangement changing the dead time from a first dead time to a second dead time and comparing power loss associated with the selected parameter for the first and second dead times and determining which of the power losses associated with the two dead times is smaller;
a dead time implementing stage for implementing the two dead times; and
the control arrangement selecting the dead time associated with the smaller power loss and providing a signal to the dead time implementing stage to set the selected dead time, and wherein the selected parameter comprises an error signal output from an error amplifier providing a modulation input to a circuit for generating a PWM signal supplied to at least one of the switches.
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Specification