Patent ID: 11935719
Assignee: SILICONBRITE TECHNOLOGIES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A power switch controller comprising:
a condition detector with one or more sense inputs and a condition result output;
a zero crossing detector with a zero input, and a zero crossing indicator output;
a retimer with a condition result input coupled with the condition result output to receive a detected conditions signal, a zero crossing input coupled with the zero crossing indicator output, and one or more retimed signal outputs; and
a driver with an input coupled with the one or more retimed signal outputs, and one or more coil outputs;
wherein:
the detected conditions signal includes a must-make value and a must-break value;
the one or more sense inputs, the zero input and the one or more coil outputs are coupled with external terminals of the power switch controller;
the condition detector includes a threshold detector and/or a window detector;
the condition detector generates the detected conditions signal in response to a sense signal on the sense input by comparing a sense signal value with a threshold in the threshold detector and/or by comparing the sense signal value with a window in the window detector;
the zero crossing detector is configured to detect times of zero transitions in an AC power signal;
the retimer is configured to output a retimed signal in response to a change in the detected conditions signal by waiting for a time of a zero transition in the AC power signal and outputting a retimed must-make value after a first delay time after the zero transition in the AC power signal or outputting a retimed must-break value after a second delay time after the zero transition in the AC power signal;
the driver is configured to output a first shaped pulse on one of the one or more coil outputs in response to a retimed must-make value and to output a second shaped pulse on one of the one or more coil outputs in response to a retimed must-break value;
the first shaped pulse and the second shaped pulse each have a duration shorter than 20 milliseconds; and
the first shaped pulse begins at least 50 milliseconds after a prior second shaped pulse has ended.