Electronic circuit control element with tap element
First Claim
1. An electronic circuit control element, comprising:
- a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a voltage between the fourth and second terminals of the power transistor is substantially proportional to a current flowing between the first and second terminals when a voltage between the first and second terminals is less than a pinch off voltage, wherein the voltage between the fourth and second terminals of the power transistor is substantially constant and less than the voltage between the first and second terminals when the voltage between the first and second terminals is greater than the pinch off voltage.
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Accused Products
Abstract
A technique for controlling a power supply with power supply control element with a tap element. In one embodiment, a power supply regulator includes a power transistor having first, second, third and fourth terminals. A control circuit is included, which is coupled to the third and fourth terminals of the power transistor. The power transistor is configured to switch a current between the first and second terminals in response a control signal received from the control circuit at the third terminal. A voltage between the fourth and second terminals of the power transistor is substantially proportional to a current flowing between the first and second terminals when a voltage between the first and second terminals is less than a pinch off voltage. The voltage between the fourth and second terminals of the power transistor is substantially constant and less than the voltage between the first and second terminals when the voltage between the first and second terminals is greater than the pinch off voltage.
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Citations
37 Claims
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1. An electronic circuit control element, comprising:
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a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a voltage between the fourth and second terminals of the power transistor is substantially proportional to a current flowing between the first and second terminals when a voltage between the first and second terminals is less than a pinch off voltage, wherein the voltage between the fourth and second terminals of the power transistor is substantially constant and less than the voltage between the first and second terminals when the voltage between the first and second terminals is greater than the pinch off voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power supply regulator, comprising:
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a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a voltage between the fourth and second terminals is substantially proportional to a current flowing between the first and second terminals when a voltage between the first and second terminals is less than a pinch off voltage, wherein the voltage between the fourth and second terminals is substantially constant and less than the voltage between the first and second terminals when the voltage between the first and second terminals is greater than the pinch off voltage. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A power supply control element, comprising:
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a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a current provided at the fourth terminal of the power transistor is to be drawn from at least one of the first and second terminals of the power transistor to provide power to the control circuit. - View Dependent Claims (14, 15, 16)
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17. A power supply control element, comprising:
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a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a voltage between the fourth and second terminals is substantially proportional to a current flowing between the first and second terminals, the voltage between the fourth and second terminals providing an input signal to a current limit function of the control circuit. - View Dependent Claims (18, 19)
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20. A power supply control element, comprising:
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a power transistor having first, second, third and fourth terminals; and
a control circuit coupled to the third and fourth terminals of the power transistor, wherein a voltage at the fourth terminal is coupled to provide an input signal to a line sense function of the control circuit. - View Dependent Claims (21, 22, 23)
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24. A high voltage transistor, comprising:
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a drain region of a first conductivity type;
a source region of the first conductivity type;
a tap region of the first conductivity type;
a body region of a second conductivity type opposite to the first conductivity type, the body region adjoining the source region;
a drift region of the first conductivity type extending from the drain region to the body region;
a tap drift region of the first conductivity type extending from the drain region to the tap region; and
an insulated gate adjacent the body region. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification