Charging circuit interrupt devices with self-test and methods thereof
First Claim
1. A charging circuit interrupt device for coupling a first power line of a power system to a first output power line of an output system and coupling a second input power line of the power system to a second output power line of the output system, such that the power system applies an input voltage to the output system, comprising:
- a current-detecting unit, executing a leakage-detecting function, wherein the current-detecting unit generates a leakage signal when a current difference in a section of the first input power line and the second input power line is detected;
a self-test device, generating a bypass path according to a detection enable signal, such that a test current flows from a first node of the first input power line to a second node of the second input power line, and there is the current difference in the section; and
a controller, generating the detection enable signal when the controller operates in a self-test mode, wherein when the controller receives the leakage signal, the controller determines that the leakage-detecting function is normal, stops generating the detection enable signal, and enters a normal mode to apply the input voltage to the output system, wherein the controller determines, according to a voltage signal, a voltage range of the input voltage to output a state signal, and the self-test device operates in either a first mode or a second mode according to the state signal, wherein the bypass path has a first resistance when the self-test device operates in the first mode, wherein the bypass path has a second resistance when the self-test device operates in the second mode.
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Accused Products
Abstract
A charging circuit interrupting device for applying an input voltage provided by first and second input power lines of a power system to first and second output power lines of an output system includes a current-detecting unit, a self-test device, and a controller. The current-detecting unit executes a leakage-detection function and generates a leakage signal when the current difference between the first and second power lines is detected. The self-test device generates a bypass path according to the detection enable signal so that there is a current difference between the first and the second input power lines. When operating in a self-test mode, the controller generates the detection enable signal, determines that the leakage-detecting function is normal, and enters a normal mode to apply the input voltage to the output system when the leakage signal is received.
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Citations
18 Claims
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1. A charging circuit interrupt device for coupling a first power line of a power system to a first output power line of an output system and coupling a second input power line of the power system to a second output power line of the output system, such that the power system applies an input voltage to the output system, comprising:
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a current-detecting unit, executing a leakage-detecting function, wherein the current-detecting unit generates a leakage signal when a current difference in a section of the first input power line and the second input power line is detected; a self-test device, generating a bypass path according to a detection enable signal, such that a test current flows from a first node of the first input power line to a second node of the second input power line, and there is the current difference in the section; and a controller, generating the detection enable signal when the controller operates in a self-test mode, wherein when the controller receives the leakage signal, the controller determines that the leakage-detecting function is normal, stops generating the detection enable signal, and enters a normal mode to apply the input voltage to the output system, wherein the controller determines, according to a voltage signal, a voltage range of the input voltage to output a state signal, and the self-test device operates in either a first mode or a second mode according to the state signal, wherein the bypass path has a first resistance when the self-test device operates in the first mode, wherein the bypass path has a second resistance when the self-test device operates in the second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A charging circuit self-test method, adapted for a charging circuit interrupt device coupling a first input power line of a power system to a first output power line of an output system and coupling a second input power line of the power system to a second output power line of the output system, such that the power system applies an input voltage to the output system, comprising:
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generating a detection enable signal when the charging circuit interrupt device operates in a self-test mode, wherein the self-test mode is configured to self-detect a leakage-detecting function; generating a bypass path by a self-test device according to the detection enable signal, such that a test current flows from a first node of the first input power line to a second node of the second input power line, and there is a current difference in a section of the first input power line and the second input power line, wherein the step of generating the bypass path by the self-test device according to the detection enable signal further comprises; determining, according to a voltage signal, a voltage range of the input voltage to generate a state signal; and operating the self-test device in either a first mode or a second mode according to the state signal, wherein the bypass path has a first resistance when the self-test device operates in the first mode, wherein the bypass path has a second resistance when the self-test device operates in the second mode; generating a leakage signal when the current difference in the section is detected; determining the leakage-detecting function is normal when the leakage signal is received; operating the charging circuit interrupt device in a normal mode; and applying the input voltage to the output system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification