Patent ID: 9188628
Filing Date: 2015-11-17
Classification: G01R

Abstract:
1. A load apparatus for testing an LED driving circuit, comprising: a first comparison circuit, receiving an input voltage provided by the LED driving circuit from an input terminal and obtaining a first sensing voltage according to the input voltage, and comparing whether the first sensing voltage is greater than a first reference voltage for providing a first sensing signal to determine whether the input voltage is greater than a forward bias of an LED; a switch circuit and a voltage-dividing load circuit, wherein a control terminal of the switch circuit receives the first sensing signal, a first terminal of the switch circuit receives the input voltage, and at least one terminal of the switch circuit is coupled to the voltage-dividing load circuit, the switch circuit guides the input voltage to the voltage-dividing load circuit according to the first sensing signal, and the voltage-dividing load circuit generates a second sensing voltage according to an input current generated at the input terminal and a load of the voltage-dividing load circuit; and a second comparison circuit, coupled to the voltage-dividing load circuit, and comparing whether the input current is greater than a reference current according to the second sensing voltage to determine whether the input current complies with a preset current value, so as to provide a testing signal.