Isolated power transfer with integrated transformer and voltage control
First Claim
1. An isolated power transfer device having a primary side and a secondary side isolated from the primary side by an isolation barrier, the isolated power transfer device comprising:
- a first power supply node;
a second power supply node;
a secondary-side conductive coil;
a secondary-side circuit comprising;
a rectifier circuit coupled to the secondary-side conductive coil, the first power supply node, and the second power supply node;
a first resistor coupled to the first power supply node and a terminal node;
a second resistor coupled to the terminal node and the second power supply node; and
a first circuit configured to generate a feedback signal in response to a predetermined reference voltage and a signal on the terminal node, the feedback signal having a hysteretic band defined by a first resistance of the first resistor and a second resistance of the second resistor,wherein the secondary-side circuit is configured as an AC/DC power converter circuit that provides, on the first power supply node, an output DC signal having a voltage level based on a ratio of the first resistance to the second resistance.
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Accused Products
Abstract
An isolated power transfer device has a primary side and a secondary side isolated from the primary side by an isolation barrier. A secondary-side circuit includes a rectifier circuit coupled to a secondary-side conductive coil. The secondary-side circuit includes a first resistor coupled to a first power supply node and a terminal node. The secondary-side circuit includes a second resistor coupled to the terminal node and a second power supply node. The secondary-side circuit includes a first circuit to generate a feedback signal in response to a reference voltage and a signal on the terminal node. The feedback signal has a hysteretic band defined by the first resistor and the second resistor. The secondary-side circuit is configured as an AC/DC power converter that provides, on the first power supply node, an output DC signal having a voltage level based on a ratio of the first resistor to the second resistor.
40 Citations
21 Claims
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1. An isolated power transfer device having a primary side and a secondary side isolated from the primary side by an isolation barrier, the isolated power transfer device comprising:
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a first power supply node; a second power supply node; a secondary-side conductive coil; a secondary-side circuit comprising; a rectifier circuit coupled to the secondary-side conductive coil, the first power supply node, and the second power supply node; a first resistor coupled to the first power supply node and a terminal node; a second resistor coupled to the terminal node and the second power supply node; and a first circuit configured to generate a feedback signal in response to a predetermined reference voltage and a signal on the terminal node, the feedback signal having a hysteretic band defined by a first resistance of the first resistor and a second resistance of the second resistor, wherein the secondary-side circuit is configured as an AC/DC power converter circuit that provides, on the first power supply node, an output DC signal having a voltage level based on a ratio of the first resistance to the second resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating an isolated power transfer device having a primary side and a secondary side isolated from the primary side by an isolation barrier, the method comprising:
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rectifying an AC signal received from a secondary-side conductive coil to generate an output DC signal having a voltage level based on a ratio of a first resistance of a first resistor to a second resistance of a second resistor, the first resistor and the second resistor being coupled to a terminal node of the isolated power transfer device; and generating a feedback signal in response to a predetermined reference voltage and a signal on the terminal node, the feedback signal having a hysteretic band defined by the first resistance and the second resistance. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. An isolated power transfer device comprising:
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an integrated circuit package comprising; a multi-layer substrate; a first conductive structure formed using the multi-layer substrate; and a first die held by the integrated circuit package and disposed on the first conductive structure, the first die comprising; a substrate formed of an insulating material; and a transformer formed on the substrate, the transformer comprising; a first conductive coil comprising a center tap coupled to an input power supply node of the integrated circuit package; and a second conductive coil electrically isolated from the first conductive coil, wherein the first conductive coil is configured to transfer power via the second conductive coil from the input power supply node to an output power supply node, the input power supply node being electrically isolated from the output power supply node. - View Dependent Claims (19, 20, 21)
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Specification