Power output device with protection function for short...

Details Power output device with protection function for short... Power output device with protection function for short...

2007-11-13

2007-11-13

Riley, Shawn (Department: 2838)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

11456093

ABSTRACT:
A power output device includes a bridged output stage, a reference voltage generator and a detecting unit to compare the output voltages from the aforementioned two units. The bridged output stage may be implemented by a full-bridge or a half-bridge configuration. The reference voltage generator is symmetric to the bridged output stage to generate a reference voltage, which is served as a reference voltage range for the voltage difference of the two terminals of the turned-on transistors in the bridged output stage during operation. When the detecting unit detects the voltages across the two terminals of the turned-on transistors in the bridged output stage exceed the reference voltage range, all the transistors are turned off and no power is outputted to the load. Therefore, the circuit is capable of preventing damages caused by a large current due to overload or short circuit.

REFERENCES:
patent: 6452766 (2002-09-01), Carper

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