DC/DC converter with inductor current sensing capability
First Claim
1. A DC/DC converter for converting an input voltage to a predetermined output voltage at an output node, comprising:
- a first switch for receiving said input voltage;
an inductor for coupling said first switch to said output node of said DC/DC converter such that said output voltage being generated at said output node;
a first voltage divider coupled to said output node for generating a divided voltage;
a second voltage divider coupled between said first switch and ground;
a capacitor coupled between said first voltage divider and said second voltage divider, the capacitor being capable of measuring a current passing through said inductor by sensing a voltage across said capacitor, anda controller coupled to said first switch for enabling and disenabling said first switch such that power being discontinuously provided from said input voltage to the inductor and said output voltage being adjusted to a predetermined level.
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Accused Products
Abstract
A DC/DC converter for converting an input voltage to an output voltage comprises a switch, an inductor, two voltage dividers, a capacitor, and a controller. The switch coupled to the input voltage. The inductor having a parasitic direct current resistance is used for coupling the switch to an output node of the DC/DC converter so as to generate the output voltage at the output node. The first voltage divider is coupled to the output node for generating a divided voltage of the output voltage. The second voltage divider is coupled to the switch and ground. The capacitor coupled to the first voltage divider and the second divider to measure the current through the inductor by sensing a voltage across the capacitor. The controller coupled to the first switch for enabling and disenabling it so as to discontinuously providing power from the input voltage to the inductor.
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Citations
19 Claims
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1. A DC/DC converter for converting an input voltage to a predetermined output voltage at an output node, comprising:
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a first switch for receiving said input voltage; an inductor for coupling said first switch to said output node of said DC/DC converter such that said output voltage being generated at said output node; a first voltage divider coupled to said output node for generating a divided voltage; a second voltage divider coupled between said first switch and ground; a capacitor coupled between said first voltage divider and said second voltage divider, the capacitor being capable of measuring a current passing through said inductor by sensing a voltage across said capacitor, and a controller coupled to said first switch for enabling and disenabling said first switch such that power being discontinuously provided from said input voltage to the inductor and said output voltage being adjusted to a predetermined level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for converting an input DC voltage to a predetermined DC voltage at an output terminal, comprising the steps of:
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receiving an input DC voltage at a first switch; controlling said first switch to discontinuously coupling said input DC voltage to an inductor for generating an output DC voltage; generating a feedback voltage signal at a first voltage divider coupled to said output terminal, wherein said feedback voltage signal being proportional to a voltage at said output terminal; generating a feedback current signal at a capacitor coupled to said first voltage divider and a second voltage divider, wherein said second voltage divider being coupled to said inductor, and wherein said feedback current signal being proportional to a current through said inductor; and receiving said feedback voltage signal and said feedback current signal such that said output DC voltage being adjusted to a predetermined level. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification