Power supply system
First Claim
1. A power supply system for supplying power from a power source circuit to a load circuit through a respective power line, comprising:
- a breaker element provided for said power line, which is turned ON and OFF in response to external control signals, to connect and disconnect said power source circuit to and from said load circuit;
overcurrent detection means provided for said power line for detecting an overcurrent in said load circuit;
a short-circuit protection controller provided for said power line, which turns OFF said breaker element to disconnect said power line from said load circuit if a signal from said overcurrent detection means indicates that there is an overcurrent in said load circuit;
a control circuit connected to said power line of said load circuit, for controlling said load circuit; and
current limit means connected in parallel with said breaker element, for passing a small current while said breaker element if OFF, said control circuit being sufficiently driven with the small current.
3 Assignments
0 Petitions
Accused Products
Abstract
A power supply system includes load circuits connected to a power source circuit through respective power lines. Each of the power lines is provided with a breaker element such as a FET that connects and disconnects the power line to and from the load circuit, and an overcurrent detection resistor for detecting an overcurrent in the load circuit. If an overcurrent is detected according to a signal from the overcurrent detection resistor, a short-circuit protection controller opens the breaker element to cut off the power line from the load circuit. A voltage monitor circuit monitors the voltage of the load circuit, and a control circuit controls the load circuit.
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Citations
20 Claims
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1. A power supply system for supplying power from a power source circuit to a load circuit through a respective power line, comprising:
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a breaker element provided for said power line, which is turned ON and OFF in response to external control signals, to connect and disconnect said power source circuit to and from said load circuit; overcurrent detection means provided for said power line for detecting an overcurrent in said load circuit; a short-circuit protection controller provided for said power line, which turns OFF said breaker element to disconnect said power line from said load circuit if a signal from said overcurrent detection means indicates that there is an overcurrent in said load circuit; a control circuit connected to said power line of said load circuit, for controlling said load circuit; and current limit means connected in parallel with said breaker element, for passing a small current while said breaker element if OFF, said control circuit being sufficiently driven with the small current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power supply system for supplying power from a power source circuit to a load circuit through a respective power line, comprising:
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a breaker element provided for said power line, which is turned ON and OFF in response to external control signals, to connect and disconnect said power source circuit to and from said load circuit; a short-circuit protection controller provided for said power line, which turns OFF said breaker element to disconnect said power line from said load circuit in response to an overcurrent signal indicating that there is an overcurrent in said load circuit; a control circuit connected to said power line of said load circuit, for controlling said load circuit; and current limit means connected in parallel with said breaker element, for passing a small current while said breaker element is OFF, said control circuit being sufficiently driven with the small current. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification