Current detection device

Abstract

The embodiment of the invention provides a current detection device which comprises a current mutual inductance circuit, a first comparator, a latch, a second comparator and an alarm; wherein the input end of the current mutual inductance circuit is connected with the output end of an LED light source controller; the first input end of the first comparator is connected with the output end of the current mutual inductance circuit, and the second input end of the first comparator is connected with first threshold voltage, the output end of the first comparator is connected with the input end ofthe latch, the first comparator is used for starting the latch according to a comparison result of the first voltage signal and the first threshold voltage; the output end of the latch is connected with the first input end of the second comparator, the second input end of the second comparator accesses to second threshold voltage, the output end of the second comparator is connected with the alarm, and the second comparator is used for triggering the alarm according to the comparison result of the second voltage signal and the second threshold voltage, so as to alarm abnormal output current ofthe light source controller.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a current detection device. Background technique [0002] Nowadays, light emitting diode (Light Emitting Diode, LED for short) light sources have been widely used in various industrial and civil lighting fields. In order to realize the precise control of the brightness and on-off time of the LED light source, a dedicated light source controller is often configured. [0003] However, in practical applications, the LED light source may work abnormally, and the cause of the abnormal work may be due to the abnormality of the light source controller or the abnormality of the LED light source. Therefore, it is necessary to find out the abnormality of the LED light source in time. situation in order to deal with it in a timely manner. Contents of the invention [0004] In view of this, an embodiment of the present invention provides a current detection device, which is used to d...

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Problems solved by technology

[0003] However, in practical applications, the LED light source may work abnormally, and the cause of the abnormal work may be due to the abnormality of the light source controller or the abnormality of the LED light source. Therefore, it is necessary to find out the abnormality of the LED light source in time. situation in order to deal with it in a timely manner

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