Replication of a drive signal across a galvanic isolation barrier
First Claim
1. A control system, the control system comprising:
- a first voltage domain circuit, the first voltage domain circuit including circuitry for operating in a first voltage domain;
a second voltage domain circuit, the second voltage domain circuit including circuitry for operating in a second voltage domain, the second voltage domain circuit comprising;
a driver circuit, the driver circuit for providing a control terminal driving signal to make conductive a power switch;
a replication circuit, the replication circuit having an output to provide a replicated signal of the control terminal driving signal;
a galvanic isolation barrier signal path between the first voltage domain circuit and the second voltage domain circuit, wherein the replicated signal is provided by the second voltage domain circuit to the first voltage domain circuit via the galvanic isolation barrier signal path.
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Abstract
In one embodiment, a control system includes a first voltage domain circuit. The first voltage domain circuit includes circuitry for operating in a first voltage domain. The control system includes a second voltage domain circuit. The second voltage domain circuit includes circuitry for operating in a second voltage domain. The second voltage domain circuit includes a driver circuit. The driver circuit for providing a control terminal driving signal to make conductive a power switch. The second voltage domain circuit includes a replication circuit, the replication circuit having an output to provide a replicated signal of the control terminal driving signal. The control system includes a galvanic isolation barrier signal path between the first voltage domain circuit and the second voltage domain circuit. The replicated signal is provided by the second voltage domain circuit to the first voltage domain circuit via the galvanic isolation barrier signal path.
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Citations
20 Claims
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1. A control system, the control system comprising:
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a first voltage domain circuit, the first voltage domain circuit including circuitry for operating in a first voltage domain; a second voltage domain circuit, the second voltage domain circuit including circuitry for operating in a second voltage domain, the second voltage domain circuit comprising; a driver circuit, the driver circuit for providing a control terminal driving signal to make conductive a power switch; a replication circuit, the replication circuit having an output to provide a replicated signal of the control terminal driving signal; a galvanic isolation barrier signal path between the first voltage domain circuit and the second voltage domain circuit, wherein the replicated signal is provided by the second voltage domain circuit to the first voltage domain circuit via the galvanic isolation barrier signal path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a power switch, the method comprising:
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providing by a first voltage domain circuit a drive signal to a control terminal of a power switch to control the conductivity of the power switch; utilizing, by the first voltage domain circuit, the drive signal to generate a replicated signal of the drive signal; providing by the first voltage domain circuit, the replicated signal to a second voltage domain circuit via a galvanic isolation barrier signal path between the first voltage domain circuit and the second voltage domain circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A control system, the control system comprising:
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a first die, the first die including an evaluation circuit; a second die, the second die comprising; a driver circuit, the driver circuit including circuitry utilized in the generation of a control terminal driving signal from a pulse width modulated signal to make conductive a power switch; a replication circuit, the replication circuit having an output to provide a replicated signal of the control terminal driving signal; a first galvanic isolation barrier signal path between the first die and the second die, the first die operable to provide the pulse width modulated signal to the second die via the first galvanic isolation barrier signal path; a second galvanic isolation barrier signal path between the first die and the second die, wherein the replicated signal is provided by the second die to the first die via the second galvanic isolation barrier signal path; wherein the evaluation circuit compares the pulse width modulated signal with the replicated signal to determine whether the second die is operating properly in the generation of the control terminal driving signal.
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Specification