Spike control apparatus for DC-DC converter
First Claim
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1. A switching regulator, comprising:
- a main switch;
a synchronous switch, where the main switch and the synchronous switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects when the main switch and the synchronous switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on.
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Abstract
There are disclosed a synchronous rectifying type of DC—DC converter, a DC—DC converter control circuit constituting such a type of DC—DC converter, a monitor circuit for monitoring an operation of a DC—DC converter, and an electronic equipment having a DC—DC converter, considering a conduction current. A DC—DC converter has a main switch and a synchronous rectifying switch, in which said main switch and said synchronous rectifying switch are alternately turned on so that a voltage of a DC electric power is transformed and outputted. A state that said main switch and said synchronous rectifying switch are simultaneously turned on is detected.
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Citations
35 Claims
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1. A switching regulator, comprising:
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a main switch;
a synchronous switch, where the main switch and the synchronous switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects when the main switch and the synchronous switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A switching regulator, comprising:
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a first switch;
an inductor which is connected in series with the first switch;
a second switch disposed between a connecting point of the first switch with the inductor and a ground point, in which the first switch and the second switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects a state that the first switch and the second switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the first switch and the second switch, and detects a voltage across one of the first switch and the second switch to detect the state in which the first switch and the second switch are simultaneously turned on.
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8. A switching regulator, comprising:
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a main switch;
a synchronous switch where the main switch and the synchronous switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a switching control circuit that controls the main switch and the synchronous switch, comprising a detection circuit that detects a state that the main switch and the synchronous switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A switching regulator control circuit, comprising:
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a first switch connected in series to an inductor;
a second switch disposed between a connecting point of the first switch with the inductor and a ground point where the first switch and the second switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects when the first switch and the second switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the first switch and the second switch, and detects a voltage across one of the first switch and the second switch to detect the state in which the first switch and the second switch are simultaneously turned on.
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15. A monitor circuit for a switching regulator, comprising:
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a main switch; and
a synchronous switch, both of which are alternately turned on so that a voltage of a DC electric power is transformed and output, the monitor circuit comprising a detection circuit that detects a state that the main switch and the synchronous switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A monitor circuit for a switching regulator control circuit, comprising:
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a first switch connected in series to an inductor;
a second switch disposed between a connecting point of the first switch with the inductor and a ground point where the first switch and the second switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects when the first switch and the second switch are simultaneously turned on, wherein the detection circuit monitors a driving signal that drives at least one of the first switch and the second switch, and detects a voltage across one of the first switch and the second switch to detect the state in which the first switch and the second switch are simultaneously turned on.
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22. An electronic equipment, comprising:
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a switching regulator;
a main switch;
a synchronous switch, where the main switch and the synchronous switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects when the main switch and the synchronous switch are simultaneously turned on, wherein the electronic equipment is operative with an electronic power from the switching regulator, wherein the detection circuit monitors a driving signal that drives at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on. - View Dependent Claims (23, 24, 25, 26, 27)
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28. An electronic equipment, comprising:
a switching regulator, comprising a first switch;
an inductor which is connected in series with the first switch;
a second switch disposed between a connecting point of the first switch with the inductor and a ground point, in which the first switch and the second switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
a detection circuit that detects a state that the first switch and the second switch are simultaneously turned on, wherein the electronic equipment is operative with an electronic power from the DC—
DC converter,wherein the detection circuit monitors a driving signal that drives at least one of the first switch and the second switch, and detects a voltage across one of the first switch and the second switch to detect the state in which the first switch and the second switch are simultaneously turned on.
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29. A method of monitoring a switching regulator, comprising:
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turning on a main switch;
turning on a synchronous switch, wherein the main switch and the synchronous switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
detecting a state that the main switch and the synchronous rectifying switch are simultaneously turned on is detected, wherein the detecting monitors a driving signal driving at least one of the main switch and the synchronous switch, and detects a voltage across one of the main switch and the synchronous switch to detect a state in which the main switch and the synchronous switch are simultaneously turned on. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A method of monitoring a switching regulator, comprising:
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turning on a first switch and an inductor which are connected in series;
turning on a second switch disposed between a connecting point of the first switch with the inductor and a ground point, wherein the first switch and the second switch are alternately turned on so that a voltage of a DC electric power is transformed and output; and
detecting a voltage across one of the first switch and the second switch to detect a state in which the first switch and the second switch are simultaneously turned on.
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Specification