CONTROL SYSTEM FOR A POWER CONVERTER AND METHOD OF OPERATING THE SAME
First Claim
1. A control system, comprising:
- an opto-isolator circuit, including a resistor coupled between an optical isolator of said opto-isolator circuit and a feedback node of said control system, said opto-isolator circuit configured to receive an output signal from a power converter and provide a feedback signal to said feedback node to provide a switch control signal for a power switch of said power converter; and
a comparator coupled to said feedback node and configured to enable a hiccup mode of operation of said power converter when a voltage at said feedback node exceeds a threshold level.
1 Assignment
0 Petitions
Accused Products
Abstract
A power converter employing a control system configured to make multiple functional use of a circuit node therein and method of operating the same. In one embodiment, the power converter includes a power train including at least one power switch. The power converter also includes a control system including an opto-isolator circuit, including a resistor, configured to receive an output signal from the power converter and provide a feedback signal to a feedback node for the control system to provide a switch control signal for the at least one power switch. The control system also includes a current source configured to produce multiple voltage levels at the feedback node in accordance with the resistor, thereby enabling multiple functional uses of the feedback node.
25 Citations
20 Claims
-
1. A control system, comprising:
-
an opto-isolator circuit, including a resistor coupled between an optical isolator of said opto-isolator circuit and a feedback node of said control system, said opto-isolator circuit configured to receive an output signal from a power converter and provide a feedback signal to said feedback node to provide a switch control signal for a power switch of said power converter; and a comparator coupled to said feedback node and configured to enable a hiccup mode of operation of said power converter when a voltage at said feedback node exceeds a threshold level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method, comprising:
-
to receiving an output signal from a power converter; providing a feedback signal to a feedback node to provide a switch control signal for a power switch of said power converter; and enabling a hiccup mode of operation of said power converter when a voltage at said feedback node exceeds a threshold level. - View Dependent Claims (11, 12, 13)
-
-
14. A power converter, comprising:
-
a power train including at least one power switch; and a control system, including; an opto-isolator circuit, including a resistor coupled between an optical isolator of said opto-isolator circuit and a feedback node of said control system, said opto-isolator circuit configured to receive an output signal from said power converter and provide a feedback signal to said feedback node to provide a switch control signal for said at least one power switch of said power converter, and a comparator coupled to said feedback node and configured to enable a hiccup mode of operation of said power converter when a voltage at said feedback node exceeds a threshold level. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification